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index optimizations

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This commit is contained in:
Josh Baker 2017-08-10 17:32:40 -07:00
parent 81ef8218fb
commit cd057088d9
49 changed files with 13467 additions and 859 deletions
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12
controller/collection/collection.go
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@ -113,7 +113,7 @@ func (c *Collection) TotalWeight() int {
}
// Bounds returns the bounds of all the items in the collection.
func (c *Collection) Bounds() (minX, minY, minZ, maxX, maxY, maxZ float64) {
func (c *Collection) Bounds() (minX, minY, maxX, maxY float64) {
return c.index.Bounds()
}
@ -357,12 +357,8 @@ func (c *Collection) ScanGreaterOrEqual(id string, desc bool,
}
func (c *Collection) geoSearch(bbox geojson.BBox, iterator func(id string, obj geojson.Object, fields []float64) bool) bool {
return c.index.Search(bbox.Min.Y, bbox.Min.X, bbox.Max.Y, bbox.Max.X, bbox.Min.Z, bbox.Max.Z, func(item index.Item) bool {
var iitm *itemT
iitm, ok := item.(*itemT)
if !ok {
return true // just ignore
}
return c.index.Search(bbox.Min.Y, bbox.Min.X, bbox.Max.Y, bbox.Max.X, bbox.Min.Z, bbox.Max.Z, func(item interface{}) bool {
iitm := item.(*itemT)
if !iterator(iitm.id, iitm.object, c.getFieldValues(iitm.id)) {
return false
}
@ -534,7 +530,7 @@ func (c *Collection) Intersects(sparse uint8, obj geojson.Object, minLat, minLon
}
func (c *Collection) NearestNeighbors(lat, lon float64, iterator func(id string, obj geojson.Object, fields []float64) bool) bool {
return c.index.NearestNeighbors(lat, lon, func(item index.Item) bool {
return c.index.NearestNeighbors(lat, lon, func(item interface{}) bool {
var iitm *itemT
iitm, ok := item.(*itemT)
if !ok {

4
controller/crud.go
View File

@ -74,7 +74,7 @@ func (c *Controller) cmdBounds(msg *server.Message) (string, error) {
if msg.OutputType == server.JSON {
buf.WriteString(`{"ok":true`)
}
minX, minY, minZ, maxX, maxY, maxZ := col.Bounds()
minX, minY, maxX, maxY := col.Bounds()
bbox := geojson.New2DBBox(minX, minY, maxX, maxY)
if msg.OutputType == server.JSON {
@ -85,12 +85,10 @@ func (c *Controller) cmdBounds(msg *server.Message) (string, error) {
resp.ArrayValue([]resp.Value{
resp.FloatValue(minX),
resp.FloatValue(minY),
resp.FloatValue(minZ),
}),
resp.ArrayValue([]resp.Value{
resp.FloatValue(maxX),
resp.FloatValue(maxY),
resp.FloatValue(maxZ),
}),
}))
}

5
controller/search.go
View File

@ -323,6 +323,7 @@ func (c *Controller) cmdNearby(msg *server.Message) (res string, err error) {
o: o,
fields: fields,
distance: distance,
noLock: true,
})
}
if s.knn {
@ -416,6 +417,7 @@ func (c *Controller) cmdWithinOrIntersects(cmd string, msg *server.Message) (res
id: id,
o: o,
fields: fields,
noLock: true,
})
},
)
@ -429,6 +431,7 @@ func (c *Controller) cmdWithinOrIntersects(cmd string, msg *server.Message) (res
id: id,
o: o,
fields: fields,
noLock: true,
})
},
)
@ -485,6 +488,7 @@ func (c *Controller) cmdSearch(msg *server.Message) (res string, err error) {
id: id,
o: o,
fields: fields,
noLock: true,
})
},
)
@ -498,6 +502,7 @@ func (c *Controller) cmdSearch(msg *server.Message) (res string, err error) {
id: id,
o: o,
fields: fields,
noLock: true,
})
},
)

1
index/.gitignore vendored Normal file
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@ -0,0 +1 @@
*.png

107
index/index.go
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@ -2,6 +2,7 @@ package index
import (
"math"
"unsafe"
"github.com/tidwall/tile38/index/rtree"
)
@ -32,14 +33,14 @@ type Index struct {
r *rtree.RTree
nr map[*rtree.Rect]Item // normalized points
nrr map[Item][]*rtree.Rect // normalized points
mulm map[Item]bool // store items that contain multiple rects
mulm map[interface{}]bool // store items that contain multiple rects
}
// New create a new index
func New() *Index {
return &Index{
r: rtree.New(),
mulm: make(map[Item]bool),
mulm: make(map[interface{}]bool),
nr: make(map[*rtree.Rect]Item),
nrr: make(map[Item][]*rtree.Rect),
}
@ -96,7 +97,7 @@ func (ix *Index) Remove(item Item) {
// Count counts all items in the index.
func (ix *Index) Count() int {
count := 0
ix.Search(-90, -180, 90, 180, math.Inf(-1), math.Inf(+1), func(item Item) bool {
ix.Search(-90, -180, 90, 180, math.Inf(-1), math.Inf(+1), func(_ interface{}) bool {
count++
return true
})
@ -104,7 +105,7 @@ func (ix *Index) Count() int {
}
// Bounds returns the minimum bounding rectangle of all items in the index.
func (ix *Index) Bounds() (MinX, MinY, MinZ, MaxX, MaxY, MaxZ float64) {
func (ix *Index) Bounds() (MinX, MinY, MaxX, MaxY float64) {
return ix.r.Bounds()
}
@ -113,70 +114,90 @@ func (ix *Index) RemoveAll() {
ix.r.RemoveAll()
}
func (ix *Index) getRTreeItem(item rtree.Item) Item {
switch item := item.(type) {
case Item:
return item
case *rtree.Rect:
return ix.nr[item]
}
return nil
type UintptrInterface struct {
Type uintptr
Ptr uintptr
}
type UnsafePointerInterface struct {
Type uintptr
Ptr unsafe.Pointer
}
func (ix *Index) NearestNeighbors(lat, lon float64, iterator func(item Item) bool) bool {
func GetUintptrInterface(v interface{}) UintptrInterface {
return *(*UintptrInterface)(unsafe.Pointer(&v))
}
func GetUnsafePointerInterface(v interface{}) UnsafePointerInterface {
return *(*UnsafePointerInterface)(unsafe.Pointer(&v))
}
var rectType = func() uintptr {
var rrrr rtree.Rect
return GetUintptrInterface(&rrrr).Type
}()
func (ix *Index) getRTreeItem(item interface{}) interface{} {
uzi := GetUnsafePointerInterface(item)
if uzi.Type == rectType {
return ix.nr[(*rtree.Rect)(uzi.Ptr)]
}
return item
}
func (ix *Index) NearestNeighbors(lat, lon float64, iterator func(item interface{}) bool) bool {
x, y, _ := normPoint(lat, lon)
return ix.r.NearestNeighbors(x, y, 0, func(item rtree.Item, dist float64) bool {
iitm := ix.getRTreeItem(item)
if item == nil {
return true
}
return iterator(iitm)
return ix.r.NearestNeighbors(x, y, func(item interface{}, dist float64) bool {
return iterator(ix.getRTreeItem(item))
})
}
// Search returns all items that intersect the bounding box.
func (ix *Index) Search(swLat, swLon, neLat, neLon, minZ, maxZ float64, iterator func(item Item) bool) bool {
func (ix *Index) Search(swLat, swLon, neLat, neLon, minZ, maxZ float64,
iterator func(item interface{}) bool,
) bool {
var keepon = true
var idm = make(map[Item]bool)
var idm = make(map[interface{}]bool)
mins, maxs, _ := normRect(swLat, swLon, neLat, neLon)
// Points
if len(mins) == 1 {
// There is only one rectangle.
// It's possible that a r rect may span multiple entries. Check mulm map for spanning rects.
if keepon {
ix.r.Search(mins[0][0], mins[0][1], minZ, maxs[0][0], maxs[0][1], maxZ, func(item rtree.Item) bool {
iitm := ix.getRTreeItem(item)
if iitm != nil {
if ix.mulm[iitm] {
if !idm[iitm] {
idm[iitm] = true
keepon = iterator(iitm)
ix.r.Search(mins[0][0], mins[0][1], minZ, maxs[0][0], maxs[0][1], maxZ,
func(v interface{}) bool {
item := ix.getRTreeItem(v)
if len(ix.mulm) > 0 && ix.mulm[item] {
if !idm[item] {
idm[item] = true
keepon = iterator(item)
}
} else {
keepon = iterator(iitm)
keepon = iterator(item)
}
}
return keepon
})
return keepon
},
)
}
} else {
// There are multiple rectangles. Duplicates might occur.
for i := range mins {
if keepon {
ix.r.Search(mins[i][0], mins[i][1], minZ, maxs[i][0], maxs[i][1], maxZ, func(item rtree.Item) bool {
iitm := ix.getRTreeItem(item)
if iitm != nil {
if ix.mulm[iitm] {
if !idm[iitm] {
idm[iitm] = true
ix.r.Search(mins[i][0], mins[i][1], minZ, maxs[i][0], maxs[i][1], maxZ,
func(item interface{}) bool {
iitm := ix.getRTreeItem(item)
if iitm != nil {
if ix.mulm[iitm] {
if !idm[iitm] {
idm[iitm] = true
keepon = iterator(iitm)
}
} else {
keepon = iterator(iitm)
}
} else {
keepon = iterator(iitm)
}
}
return keepon
})
return keepon
},
)
}
}
}

22
index/index_test.go
View File

@ -60,9 +60,9 @@ func TestRandomInserts(t *testing.T) {
}
count = 0
items := make([]Item, 0, l)
tr.Search(-90, -180, 90, 180, 0, 0, func(item Item) bool {
tr.Search(-90, -180, 90, 180, 0, 0, func(item interface{}) bool {
count++
items = append(items, item)
items = append(items, item.(Item))
return true
})
if count != l {
@ -70,7 +70,7 @@ func TestRandomInserts(t *testing.T) {
}
start = time.Now()
count1 := 0
tr.Search(33, -115, 34, -114, 0, 0, func(item Item) bool {
tr.Search(33, -115, 34, -114, 0, 0, func(item interface{}) bool {
count1++
return true
})
@ -79,7 +79,7 @@ func TestRandomInserts(t *testing.T) {
start = time.Now()
count2 := 0
tr.Search(33-180, -115-360, 34-180, -114-360, 0, 0, func(item Item) bool {
tr.Search(33-180, -115-360, 34-180, -114-360, 0, 0, func(item interface{}) bool {
count2++
return true
})
@ -87,7 +87,7 @@ func TestRandomInserts(t *testing.T) {
start = time.Now()
count3 := 0
tr.Search(-10, 170, 20, 200, 0, 0, func(item Item) bool {
tr.Search(-10, 170, 20, 200, 0, 0, func(item interface{}) bool {
count3++
return true
})
@ -99,16 +99,16 @@ func TestRandomInserts(t *testing.T) {
fmt.Printf("Searched %d items in %s.\n", count2, searchdur2.String())
fmt.Printf("Searched %d items in %s.\n", count3, searchdur3.String())
tr.Search(-10, 170, 20, 200, 0, 0, func(item Item) bool {
lat1, lon1, _, lat2, lon2, _ := item.Rect()
tr.Search(-10, 170, 20, 200, 0, 0, func(item interface{}) bool {
lat1, lon1, _, lat2, lon2, _ := item.(Item).Rect()
if lat1 == lat2 && lon1 == lon2 {
return false
}
return true
})
tr.Search(-10, 170, 20, 200, 0, 0, func(item Item) bool {
lat1, lon1, _, lat2, lon2, _ := item.Rect()
tr.Search(-10, 170, 20, 200, 0, 0, func(item interface{}) bool {
lat1, lon1, _, lat2, lon2, _ := item.(Item).Rect()
if lat1 != lat2 || lon1 != lon2 {
return false
}
@ -173,8 +173,8 @@ func TestInsertVarious(t *testing.T) {
t.Fatalf("count = %d, expect 1", count)
}
found := false
tr.Search(-90, -180, 90, 180, 0, 0, func(item2 Item) bool {
if item2 == item {
tr.Search(-90, -180, 90, 180, 0, 0, func(item2 interface{}) bool {
if item2.(Item) == item {
found = true
}
return true

60
index/rtree/knn.go
View File

@ -1,60 +0,0 @@
package rtree
import (
"github.com/tidwall/tinyqueue"
)
type queueItem struct {
node *d3nodeT
data interface{}
isItem bool
dist float64
}
func (item *queueItem) Less(b tinyqueue.Item) bool {
return item.dist < b.(*queueItem).dist
}
func boxDistPoint(point []float64, childBox d3rectT) float64 {
var dist float64
for i := 0; i < len(point); i++ {
d := axisDist(point[i], float64(childBox.min[i]), float64(childBox.max[i]))
dist += d * d
}
return dist
}
func axisDist(k, min, max float64) float64 {
if k < min {
return min - k
}
if k <= max {
return 0
}
return k - max
}
// NearestNeighbors gets the closest Spatials to the Point.
func (tr *RTree) NearestNeighbors(x, y, z float64, iter func(item Item, dist float64) bool) bool {
knnPoint := []float64{x, y, z}
queue := tinyqueue.New(nil)
node := tr.tr.root
for node != nil {
for i := 0; i < node.count; i++ {
child := node.branch[i]
dist := boxDistPoint(knnPoint, node.branch[i].rect)
queue.Push(&queueItem{node: child.child, data: child.data, isItem: node.isLeaf(), dist: dist})
}
for queue.Len() > 0 && queue.Peek().(*queueItem).isItem {
item := queue.Pop().(*queueItem)
if !iter(item.data.(Item), item.dist) {
return false
}
}
last := queue.Pop()
if last != nil {
node = last.(*queueItem).node
} else {
node = nil
}
}
return true
}

52
index/rtree/rtree.go
View File

@ -1,5 +1,7 @@
package rtree
import "github.com/tidwall/tile38/index/rtreebase"
// Item is an rtree item
type Item interface {
Rect() (minX, minY, minZ, maxX, maxY, maxZ float64)
@ -17,33 +19,38 @@ func (item *Rect) Rect() (minX, minY, minZ, maxX, maxY, maxZ float64) {
// RTree is an implementation of an rtree
type RTree struct {
tr *d3RTree
tr *rtreebase.RTree
}
// New creates a new RTree
func New() *RTree {
return &RTree{
tr: d3New(),
tr: rtreebase.New(),
}
}
// Insert inserts item into rtree
func (tr *RTree) Insert(item Item) {
minX, minY, minZ, maxX, maxY, maxZ := item.Rect()
tr.tr.Insert([3]float64{minX, minY, minZ}, [3]float64{maxX, maxY, maxZ}, item)
minX, minY, _, maxX, maxY, _ := item.Rect()
tr.tr.Insert([2]float64{minX, minY}, [2]float64{maxX, maxY}, item)
}
// Remove removes item from rtree
func (tr *RTree) Remove(item Item) {
minX, minY, minZ, maxX, maxY, maxZ := item.Rect()
tr.tr.Remove([3]float64{minX, minY, minZ}, [3]float64{maxX, maxY, maxZ}, item)
minX, minY, _, maxX, maxY, _ := item.Rect()
tr.tr.Remove([2]float64{minX, minY}, [2]float64{maxX, maxY}, item)
}
// Search finds all items in bounding box.
func (tr *RTree) Search(minX, minY, minZ, maxX, maxY, maxZ float64, iterator func(item Item) bool) {
tr.tr.Search([3]float64{minX, minY, minZ}, [3]float64{maxX, maxY, maxZ}, func(data interface{}) bool {
return iterator(data.(Item))
func (tr *RTree) Search(minX, minY, minZ, maxX, maxY, maxZ float64, iterator func(data interface{}) bool) {
// start := time.Now()
// var count int
tr.tr.Search([2]float64{minX, minY}, [2]float64{maxX, maxY}, func(data interface{}) bool {
// count++
return iterator(data)
})
// dur := time.Since(start)
// fmt.Printf("%s %d\n", dur, count)
}
// Count return the number of items in rtree.
@ -53,21 +60,18 @@ func (tr *RTree) Count() int {
// RemoveAll removes all items from rtree.
func (tr *RTree) RemoveAll() {
tr.tr.RemoveAll()
tr.tr = rtreebase.New()
}
func (tr *RTree) Bounds() (minX, minY, minZ, maxX, maxY, maxZ float64) {
var rect d3rectT
if tr.tr.root != nil {
if tr.tr.root.count > 0 {
rect = tr.tr.root.branch[0].rect
for i := 1; i < tr.tr.root.count; i++ {
rect2 := tr.tr.root.branch[i].rect
rect = d3combineRect(&rect, &rect2)
}
}
}
minX, minY, minZ = float64(rect.min[0]), float64(rect.min[1]), float64(rect.min[2])
maxX, maxY, maxZ = float64(rect.max[0]), float64(rect.max[1]), float64(rect.max[2])
return
// Bounds returns the bounds of the R-tree
func (tr *RTree) Bounds() (minX, minY, maxX, maxY float64) {
min, max := tr.tr.Bounds()
return min[0], min[1], max[0], max[1]
}
// NearestNeighbors gets the closest Spatials to the Point.
func (tr *RTree) NearestNeighbors(x, y float64, iter func(item interface{}, dist float64) bool) bool {
return tr.tr.KNN([2]float64{x, y}, [2]float64{x, y}, true, func(item interface{}, dist float64) bool {
return iter(item, dist)
})
}

16
index/rtree/rtree_test.go
View File

@ -52,8 +52,8 @@ func TestA(t *testing.T) {
tr.Insert(item1)
tr.Insert(item2)
var itemA Item
tr.Search(21, 20, 0, 25, 25, 0, func(item Item) bool {
itemA = item
tr.Search(21, 20, 0, 25, 25, 0, func(item interface{}) bool {
itemA = item.(Item)
return true
})
if tr.Count() != 2 {
@ -83,13 +83,13 @@ func TestBounds(t *testing.T) {
tr.Insert(wpp(10, 30, 0))
tr.Insert(wpp(20, 10, 0))
tr.Insert(wpp(30, 10, 0))
minX, minY, minZ, maxX, maxY, maxZ := tr.Bounds()
if minX != 10 || minY != 10 || minZ != 0 || maxX != 30 || maxY != 30 || maxZ != 0 {
t.Fatalf("expected 10,10,0 30,30,0, got %v,%v %v,%v\n", minX, minY, minZ, maxX, maxY, maxZ)
minX, minY, maxX, maxY := tr.Bounds()
if minX != 10 || minY != 10 || maxX != 30 || maxY != 30 {
t.Fatalf("expected 10,10 30,30, got %v,%v %v,%v\n", minX, minY, maxX, maxY)
}
}
func TestKNN(t *testing.T) {
x, y, z := 20., 20., 0.
x, y := 20., 20.
tr := New()
tr.Insert(wpp(5, 5, 0))
tr.Insert(wpp(19, 19, 0))
@ -97,8 +97,8 @@ func TestKNN(t *testing.T) {
tr.Insert(wpp(-5, 5, 0))
tr.Insert(wpp(33, 21, 0))
var items []Item
tr.NearestNeighbors(x, y, z, func(item Item, dist float64) bool {
items = append(items, item)
tr.NearestNeighbors(x, y, func(item interface{}, dist float64) bool {
items = append(items, item.(Item))
return true
})
var res string

698
index/rtree/rtreed.go
View File

@ -1,698 +0,0 @@
package rtree
import "math"
type float float64
const d3roundValues = false // only set to true when using 32-bit floats
func d3fmin(a, b float) float {
if a < b {
return a
}
return b
}
func d3fmax(a, b float) float {
if a > b {
return a
}
return b
}
const (
d3numDims = 3
d3maxNodes = 13
d3minNodes = d3maxNodes / 2
d3useSphericalVolume = true // Better split classification, may be slower on some systems
)
var d3unitSphereVolume = []float64{
0.000000, 2.000000, 3.141593, // Dimension 0,1,2
4.188790, 4.934802, 5.263789, // Dimension 3,4,5
5.167713, 4.724766, 4.058712, // Dimension 6,7,8
3.298509, 2.550164, 1.884104, // Dimension 9,10,11
1.335263, 0.910629, 0.599265, // Dimension 12,13,14
0.381443, 0.235331, 0.140981, // Dimension 15,16,17
0.082146, 0.046622, 0.025807, // Dimension 18,19,20
}[d3numDims]
type d3RTree struct {
root *d3nodeT ///< Root of tree
}
/// Minimal bounding rectangle (n-dimensional)
type d3rectT struct {
min [d3numDims]float ///< Min dimensions of bounding box
max [d3numDims]float ///< Max dimensions of bounding box
}
/// May be data or may be another subtree
/// The parents level determines this.
/// If the parents level is 0, then this is data
type d3branchT struct {
rect d3rectT ///< Bounds
child *d3nodeT ///< Child node
data interface{} ///< Data Id or Ptr
}
/// d3nodeT for each branch level
type d3nodeT struct {
count int ///< Count
level int ///< Leaf is zero, others positive
branch [d3maxNodes]d3branchT ///< Branch
}
func (node *d3nodeT) isInternalNode() bool {
return (node.level > 0) // Not a leaf, but a internal node
}
func (node *d3nodeT) isLeaf() bool {
return (node.level == 0) // A leaf, contains data
}
// Rounding constants for float32 -> float64 conversion.
const d3RNDTOWARDS = (1.0 - 1.0/8388608.0) // Round towards zero
const d3RNDAWAY = (1.0 + 1.0/8388608.0) // Round away from zero
// Convert an sqlite3_value into an RtreeValue (presumably a float)
// while taking care to round toward negative or positive, respectively.
func d3rtreeValueDown(d float64) float {
if !d3roundValues {
return float(d)
}
f := float(d)
if float64(f) > d {
if d < 0 {
f = float(d * d3RNDAWAY)
} else {
f = float(d * d3RNDTOWARDS)
}
}
return f
}
func d3rtreeValueUp(d float64) float {
if !d3roundValues {
return float(d)
}
f := float(d)
if float64(f) < d {
if d < 0 {
f = float(d * d3RNDTOWARDS)
} else {
f = float(d * d3RNDAWAY)
}
}
return f
}
/// A link list of nodes for reinsertion after a delete operation
type d3listNodeT struct {
next *d3listNodeT ///< Next in list
node *d3nodeT ///< Node
}
const d3notTaken = -1 // indicates that position
/// Variables for finding a split partition
type d3partitionVarsT struct {
partition [d3maxNodes + 1]int
total int
minFill int
count [2]int
cover [2]d3rectT
area [2]float
branchBuf [d3maxNodes + 1]d3branchT
branchCount int
coverSplit d3rectT
coverSplitArea float
}
func d3New() *d3RTree {
// We only support machine word size simple data type eg. integer index or object pointer.
// Since we are storing as union with non data branch
return &d3RTree{
root: &d3nodeT{},
}
}
/// Insert entry
/// \param a_min Min of bounding rect
/// \param a_max Max of bounding rect
/// \param a_dataId Positive Id of data. Maybe zero, but negative numbers not allowed.
func (tr *d3RTree) Insert(min, max [d3numDims]float64, dataId interface{}) {
var branch d3branchT
branch.data = dataId
for axis := 0; axis < d3numDims; axis++ {
branch.rect.min[axis] = d3rtreeValueDown(min[axis])
branch.rect.max[axis] = d3rtreeValueUp(max[axis])
}
d3insertRect(&branch, &tr.root, 0)
}
/// Remove entry
/// \param a_min Min of bounding rect
/// \param a_max Max of bounding rect
/// \param a_dataId Positive Id of data. Maybe zero, but negative numbers not allowed.
func (tr *d3RTree) Remove(min, max [d3numDims]float64, dataId interface{}) {
var rect d3rectT
for axis := 0; axis < d3numDims; axis++ {
rect.min[axis] = d3rtreeValueDown(min[axis])
rect.max[axis] = d3rtreeValueUp(max[axis])
}
d3removeRect(&rect, dataId, &tr.root)
}
/// Find all within d3search rectangle
/// \param a_min Min of d3search bounding rect
/// \param a_max Max of d3search bounding rect
/// \param a_searchResult d3search result array. Caller should set grow size. Function will reset, not append to array.
/// \param a_resultCallback Callback function to return result. Callback should return 'true' to continue searching
/// \param a_context User context to pass as parameter to a_resultCallback
/// \return Returns the number of entries found
func (tr *d3RTree) Search(min, max [d3numDims]float64, resultCallback func(data interface{}) bool) int {
var rect d3rectT
for axis := 0; axis < d3numDims; axis++ {
rect.min[axis] = d3rtreeValueDown(min[axis])
rect.max[axis] = d3rtreeValueUp(max[axis])
}
foundCount, _ := d3search(tr.root, rect, 0, resultCallback)
return foundCount
}
/// Count the data elements in this container. This is slow as no internal counter is maintained.
func (tr *d3RTree) Count() int {
var count int
d3countRec(tr.root, &count)
return count
}
/// Remove all entries from tree
func (tr *d3RTree) RemoveAll() {
// Delete all existing nodes
tr.root = &d3nodeT{}
}
func d3countRec(node *d3nodeT, count *int) {
if node.isInternalNode() { // not a leaf node
for index := 0; index < node.count; index++ {
d3countRec(node.branch[index].child, count)
}
} else { // A leaf node
*count += node.count
}
}
// Inserts a new data rectangle into the index structure.
// Recursively descends tree, propagates splits back up.
// Returns 0 if node was not split. Old node updated.
// If node was split, returns 1 and sets the pointer pointed to by
// new_node to point to the new node. Old node updated to become one of two.
// The level argument specifies the number of steps up from the leaf
// level to insert; e.g. a data rectangle goes in at level = 0.
func d3insertRectRec(branch *d3branchT, node *d3nodeT, newNode **d3nodeT, level int) bool {
// recurse until we reach the correct level for the new record. data records
// will always be called with a_level == 0 (leaf)
if node.level > level {
// Still above level for insertion, go down tree recursively
var otherNode *d3nodeT
//var newBranch d3branchT
// find the optimal branch for this record
index := d3pickBranch(&branch.rect, node)
// recursively insert this record into the picked branch
childWasSplit := d3insertRectRec(branch, node.branch[index].child, &otherNode, level)
if !childWasSplit {
// Child was not split. Merge the bounding box of the new record with the
// existing bounding box
node.branch[index].rect = d3combineRect(&branch.rect, &(node.branch[index].rect))
return false
} else {
// Child was split. The old branches are now re-partitioned to two nodes
// so we have to re-calculate the bounding boxes of each node
node.branch[index].rect = d3nodeCover(node.branch[index].child)
var newBranch d3branchT
newBranch.child = otherNode
newBranch.rect = d3nodeCover(otherNode)
// The old node is already a child of a_node. Now add the newly-created
// node to a_node as well. a_node might be split because of that.
return d3addBranch(&newBranch, node, newNode)
}
} else if node.level == level {
// We have reached level for insertion. Add rect, split if necessary
return d3addBranch(branch, node, newNode)
} else {
// Should never occur
return false
}
}
// Insert a data rectangle into an index structure.
// d3insertRect provides for splitting the root;
// returns 1 if root was split, 0 if it was not.
// The level argument specifies the number of steps up from the leaf
// level to insert; e.g. a data rectangle goes in at level = 0.
// InsertRect2 does the recursion.
//
func d3insertRect(branch *d3branchT, root **d3nodeT, level int) bool {
var newNode *d3nodeT
if d3insertRectRec(branch, *root, &newNode, level) { // Root split
// Grow tree taller and new root
newRoot := &d3nodeT{}
newRoot.level = (*root).level + 1
var newBranch d3branchT
// add old root node as a child of the new root
newBranch.rect = d3nodeCover(*root)
newBranch.child = *root
d3addBranch(&newBranch, newRoot, nil)
// add the split node as a child of the new root
newBranch.rect = d3nodeCover(newNode)
newBranch.child = newNode
d3addBranch(&newBranch, newRoot, nil)
// set the new root as the root node
*root = newRoot
return true
}
return false
}
// Find the smallest rectangle that includes all rectangles in branches of a node.
func d3nodeCover(node *d3nodeT) d3rectT {
rect := node.branch[0].rect
for index := 1; index < node.count; index++ {
rect = d3combineRect(&rect, &(node.branch[index].rect))
}
return rect
}
// Add a branch to a node. Split the node if necessary.
// Returns 0 if node not split. Old node updated.
// Returns 1 if node split, sets *new_node to address of new node.
// Old node updated, becomes one of two.
func d3addBranch(branch *d3branchT, node *d3nodeT, newNode **d3nodeT) bool {
if node.count < d3maxNodes { // Split won't be necessary
node.branch[node.count] = *branch
node.count++
return false
} else {
d3splitNode(node, branch, newNode)
return true
}
}
// Disconnect a dependent node.
// Caller must return (or stop using iteration index) after this as count has changed
func d3disconnectBranch(node *d3nodeT, index int) {
// Remove element by swapping with the last element to prevent gaps in array
node.branch[index] = node.branch[node.count-1]
node.branch[node.count-1].data = nil
node.branch[node.count-1].child = nil
node.count--
}
// Pick a branch. Pick the one that will need the smallest increase
// in area to accommodate the new rectangle. This will result in the
// least total area for the covering rectangles in the current node.
// In case of a tie, pick the one which was smaller before, to get
// the best resolution when searching.
func d3pickBranch(rect *d3rectT, node *d3nodeT) int {
var firstTime bool = true
var increase float
var bestIncr float = -1
var area float
var bestArea float
var best int
var tempRect d3rectT
for index := 0; index < node.count; index++ {
curRect := &node.branch[index].rect
area = d3calcRectVolume(curRect)
tempRect = d3combineRect(rect, curRect)
increase = d3calcRectVolume(&tempRect) - area
if (increase < bestIncr) || firstTime {
best = index
bestArea = area
bestIncr = increase
firstTime = false
} else if (increase == bestIncr) && (area < bestArea) {
best = index
bestArea = area
bestIncr = increase
}
}
return best
}
// Combine two rectangles into larger one containing both
func d3combineRect(rectA, rectB *d3rectT) d3rectT {
var newRect d3rectT
for index := 0; index < d3numDims; index++ {
newRect.min[index] = d3fmin(rectA.min[index], rectB.min[index])
newRect.max[index] = d3fmax(rectA.max[index], rectB.max[index])
}
return newRect
}
// Split a node.
// Divides the nodes branches and the extra one between two nodes.
// Old node is one of the new ones, and one really new one is created.
// Tries more than one method for choosing a partition, uses best result.
func d3splitNode(node *d3nodeT, branch *d3branchT, newNode **d3nodeT) {
// Could just use local here, but member or external is faster since it is reused
var localVars d3partitionVarsT
parVars := &localVars
// Load all the branches into a buffer, initialize old node
d3getBranches(node, branch, parVars)
// Find partition
d3choosePartition(parVars, d3minNodes)
// Create a new node to hold (about) half of the branches
*newNode = &d3nodeT{}
(*newNode).level = node.level
// Put branches from buffer into 2 nodes according to the chosen partition
node.count = 0
d3loadNodes(node, *newNode, parVars)
}
// Calculate the n-dimensional volume of a rectangle
func d3rectVolume(rect *d3rectT) float {
var volume float = 1
for index := 0; index < d3numDims; index++ {
volume *= rect.max[index] - rect.min[index]
}
return volume
}
// The exact volume of the bounding sphere for the given d3rectT
func d3rectSphericalVolume(rect *d3rectT) float64 {
var sumOfSquares float64 = 0
var radius float64
for index := 0; index < d3numDims; index++ {
halfExtent := float64(rect.max[index]-rect.min[index]) * 0.5
sumOfSquares += halfExtent * halfExtent
}
radius = math.Sqrt(sumOfSquares)
// Pow maybe slow, so test for common dims just use x*x, x*x*x.
switch d3numDims {
default:
return (math.Pow(radius, d3numDims) * d3unitSphereVolume)
case 2:
return (radius * radius * d3unitSphereVolume)
case 3:
return (radius * radius * radius * d3unitSphereVolume)
case 4:
return (radius * radius * radius * radius * d3unitSphereVolume)
case 5:
return (radius * radius * radius * radius * radius * d3unitSphereVolume)
}
}
// Use one of the methods to calculate retangle volume
func d3calcRectVolume(rect *d3rectT) float {
if d3useSphericalVolume {
return float(d3rectSphericalVolume(rect)) // Slower but helps certain merge cases
} else { // RTREE_USE_SPHERICAL_VOLUME
return d3rectVolume(rect) // Faster but can cause poor merges
} // RTREE_USE_SPHERICAL_VOLUME
}
// Load branch buffer with branches from full node plus the extra branch.
func d3getBranches(node *d3nodeT, branch *d3branchT, parVars *d3partitionVarsT) {
// Load the branch buffer
for index := 0; index < d3maxNodes; index++ {
parVars.branchBuf[index] = node.branch[index]
}
parVars.branchBuf[d3maxNodes] = *branch
parVars.branchCount = d3maxNodes + 1
// Calculate rect containing all in the set
parVars.coverSplit = parVars.branchBuf[0].rect
for index := 1; index < d3maxNodes+1; index++ {
parVars.coverSplit = d3combineRect(&parVars.coverSplit, &parVars.branchBuf[index].rect)
}
parVars.coverSplitArea = d3calcRectVolume(&parVars.coverSplit)
}
// Method #0 for choosing a partition:
// As the seeds for the two groups, pick the two rects that would waste the
// most area if covered by a single rectangle, i.e. evidently the worst pair
// to have in the same group.
// Of the remaining, one at a time is chosen to be put in one of the two groups.
// The one chosen is the one with the greatest difference in area expansion
// depending on which group - the rect most strongly attracted to one group
// and repelled from the other.
// If one group gets too full (more would force other group to violate min
// fill requirement) then other group gets the rest.
// These last are the ones that can go in either group most easily.
func d3choosePartition(parVars *d3partitionVarsT, minFill int) {
var biggestDiff float
var group, chosen, betterGroup int
d3initParVars(parVars, parVars.branchCount, minFill)
d3pickSeeds(parVars)
for ((parVars.count[0] + parVars.count[1]) < parVars.total) &&
(parVars.count[0] < (parVars.total - parVars.minFill)) &&
(parVars.count[1] < (parVars.total - parVars.minFill)) {
biggestDiff = -1
for index := 0; index < parVars.total; index++ {
if d3notTaken == parVars.partition[index] {
curRect := &parVars.branchBuf[index].rect
rect0 := d3combineRect(curRect, &parVars.cover[0])
rect1 := d3combineRect(curRect, &parVars.cover[1])
growth0 := d3calcRectVolume(&rect0) - parVars.area[0]
growth1 := d3calcRectVolume(&rect1) - parVars.area[1]
diff := growth1 - growth0
if diff >= 0 {
group = 0
} else {
group = 1
diff = -diff
}
if diff > biggestDiff {
biggestDiff = diff
chosen = index
betterGroup = group
} else if (diff == biggestDiff) && (parVars.count[group] < parVars.count[betterGroup]) {
chosen = index
betterGroup = group
}
}
}
d3classify(chosen, betterGroup, parVars)
}
// If one group too full, put remaining rects in the other
if (parVars.count[0] + parVars.count[1]) < parVars.total {
if parVars.count[0] >= parVars.total-parVars.minFill {
group = 1
} else {
group = 0
}
for index := 0; index < parVars.total; index++ {
if d3notTaken == parVars.partition[index] {
d3classify(index, group, parVars)
}
}
}
}
// Copy branches from the buffer into two nodes according to the partition.
func d3loadNodes(nodeA, nodeB *d3nodeT, parVars *d3partitionVarsT) {
for index := 0; index < parVars.total; index++ {
targetNodeIndex := parVars.partition[index]
targetNodes := []*d3nodeT{nodeA, nodeB}
// It is assured that d3addBranch here will not cause a node split.
d3addBranch(&parVars.branchBuf[index], targetNodes[targetNodeIndex], nil)
}
}
// Initialize a d3partitionVarsT structure.
func d3initParVars(parVars *d3partitionVarsT, maxRects, minFill int) {
parVars.count[0] = 0
parVars.count[1] = 0
parVars.area[0] = 0
parVars.area[1] = 0
parVars.total = maxRects
parVars.minFill = minFill
for index := 0; index < maxRects; index++ {
parVars.partition[index] = d3notTaken
}
}
func d3pickSeeds(parVars *d3partitionVarsT) {
var seed0, seed1 int
var worst, waste float
var area [d3maxNodes + 1]float
for index := 0; index < parVars.total; index++ {
area[index] = d3calcRectVolume(&parVars.branchBuf[index].rect)
}
worst = -parVars.coverSplitArea - 1
for indexA := 0; indexA < parVars.total-1; indexA++ {
for indexB := indexA + 1; indexB < parVars.total; indexB++ {
oneRect := d3combineRect(&parVars.branchBuf[indexA].rect, &parVars.branchBuf[indexB].rect)
waste = d3calcRectVolume(&oneRect) - area[indexA] - area[indexB]
if waste > worst {
worst = waste
seed0 = indexA
seed1 = indexB
}
}
}
d3classify(seed0, 0, parVars)
d3classify(seed1, 1, parVars)
}
// Put a branch in one of the groups.
func d3classify(index, group int, parVars *d3partitionVarsT) {
parVars.partition[index] = group
// Calculate combined rect
if parVars.count[group] == 0 {
parVars.cover[group] = parVars.branchBuf[index].rect
} else {
parVars.cover[group] = d3combineRect(&parVars.branchBuf[index].rect, &parVars.cover[group])
}
// Calculate volume of combined rect
parVars.area[group] = d3calcRectVolume(&parVars.cover[group])
parVars.count[group]++
}
// Delete a data rectangle from an index structure.
// Pass in a pointer to a d3rectT, the tid of the record, ptr to ptr to root node.
// Returns 1 if record not found, 0 if success.
// d3removeRect provides for eliminating the root.
func d3removeRect(rect *d3rectT, id interface{}, root **d3nodeT) bool {
var reInsertList *d3listNodeT
if !d3removeRectRec(rect, id, *root, &reInsertList) {
// Found and deleted a data item
// Reinsert any branches from eliminated nodes
for reInsertList != nil {
tempNode := reInsertList.node
for index := 0; index < tempNode.count; index++ {
// TODO go over this code. should I use (tempNode->m_level - 1)?
d3insertRect(&tempNode.branch[index], root, tempNode.level)
}
reInsertList = reInsertList.next
}
// Check for redundant root (not leaf, 1 child) and eliminate TODO replace
// if with while? In case there is a whole branch of redundant roots...
if (*root).count == 1 && (*root).isInternalNode() {
tempNode := (*root).branch[0].child
*root = tempNode
}
return false
} else {
return true
}
}
// Delete a rectangle from non-root part of an index structure.
// Called by d3removeRect. Descends tree recursively,
// merges branches on the way back up.
// Returns 1 if record not found, 0 if success.
func d3removeRectRec(rect *d3rectT, id interface{}, node *d3nodeT, listNode **d3listNodeT) bool {
if node.isInternalNode() { // not a leaf node
for index := 0; index < node.count; index++ {
if d3overlap(*rect, node.branch[index].rect) {
if !d3removeRectRec(rect, id, node.branch[index].child, listNode) {
if node.branch[index].child.count >= d3minNodes {
// child removed, just resize parent rect
node.branch[index].rect = d3nodeCover(node.branch[index].child)
} else {
// child removed, not enough entries in node, eliminate node
d3reInsert(node.branch[index].child, listNode)
d3disconnectBranch(node, index) // Must return after this call as count has changed
}
return false
}
}
}
return true
} else { // A leaf node
for index := 0; index < node.count; index++ {
if node.branch[index].data == id {
d3disconnectBranch(node, index) // Must return after this call as count has changed
return false
}
}
return true
}
}
// Decide whether two rectangles d3overlap.
func d3overlap(rectA, rectB d3rectT) bool {
for index := 0; index < d3numDims; index++ {
if rectA.min[index] > rectB.max[index] ||
rectB.min[index] > rectA.max[index] {
return false
}
}
return true
}
// Add a node to the reinsertion list. All its branches will later
// be reinserted into the index structure.
func d3reInsert(node *d3nodeT, listNode **d3listNodeT) {
newListNode := &d3listNodeT{}
newListNode.node = node
newListNode.next = *listNode
*listNode = newListNode
}
// d3search in an index tree or subtree for all data retangles that d3overlap the argument rectangle.
func d3search(node *d3nodeT, rect d3rectT, foundCount int, resultCallback func(data interface{}) bool) (int, bool) {
if node.isInternalNode() {
// This is an internal node in the tree
for index := 0; index < node.count; index++ {
if d3overlap(rect, node.branch[index].rect) {
var ok bool
foundCount, ok = d3search(node.branch[index].child, rect, foundCount, resultCallback)
if !ok {
// The callback indicated to stop searching
return foundCount, false
}
}
}
} else {
// This is a leaf node
for index := 0; index < node.count; index++ {
if d3overlap(rect, node.branch[index].rect) {
id := node.branch[index].data
foundCount++
if !resultCallback(id) {
return foundCount, false // Don't continue searching
}
}
}
}
return foundCount, true // Continue searching
}

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*.png

657
index/rtreebase/base.go Normal file
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package rtreebase
import (
"math"
"unsafe"
)
// D is the number of dimensions
const D = 2
const M = 13
// precalculate infinity
var mathInfNeg = math.Inf(-1)
var mathInfPos = math.Inf(+1)
type treeNode struct {
min, max [D]float64
children [M + 1]*treeNode
count int
height int
leaf bool
}
func (node *treeNode) unsafeItem() *treeItem {
return (*treeItem)(unsafe.Pointer(node))
}
func createNode(children []*treeNode) *treeNode {
n := &treeNode{
height: 1,
leaf: true,
}
if len(children) > 0 {
n.count = len(children)
copy(n.children[:n.count], children)
}
for i := 0; i < D; i++ {
n.min[i] = mathInfPos
n.max[i] = mathInfNeg
}
return n
}
func (node *treeNode) extend(b *treeNode) {
for i := 0; i < len(node.min); i++ {
if b.min[i] < node.min[i] {
node.min[i] = b.min[i]
}
if b.max[i] > node.max[i] {
node.max[i] = b.max[i]
}
}
}
func (node *treeNode) area() float64 {
area := node.max[0] - node.min[0]
for i := 1; i < len(node.min); i++ {
area *= node.max[i] - node.min[i]
}
return area
}
func (node *treeNode) enlargedAreaAxis(b *treeNode, axis int) float64 {
var max, min float64
if b.max[axis] > node.max[axis] {
max = b.max[axis]
} else {
max = node.max[axis]
}
if b.min[axis] < node.min[axis] {
min = b.min[axis]
} else {
min = node.min[axis]
}
return max - min
}
func (node *treeNode) enlargedArea(b *treeNode) float64 {
area := node.enlargedAreaAxis(b, 0)
for i := 1; i < len(node.min); i++ {
area *= node.enlargedAreaAxis(b, i)
}
return area
}
func (node *treeNode) intersectionAreaAxis(b *treeNode, axis int) float64 {
var max, min float64
if node.max[axis] < b.max[axis] {
max = node.max[axis]
} else {
max = b.max[axis]
}
if node.min[axis] > b.min[axis] {
min = node.min[axis]
} else {
min = b.min[axis]
}
if max > min {
return max - min
}
return 0
}
func (node *treeNode) intersectionArea(b *treeNode) float64 {
area := node.intersectionAreaAxis(b, 0)
for i := 1; i < len(node.min); i++ {
area *= node.intersectionAreaAxis(b, i)
}
return area
}
func (node *treeNode) margin() float64 {
margin := node.max[0] - node.min[0]
for i := 1; i < len(node.min); i++ {
margin += node.max[i] - node.min[i]
}
return margin
}
type result int
const (
not result = 0
intersects result = 1
contains result = 2
)
func (node *treeNode) overlaps(b *treeNode) result {
for i := 0; i < len(node.min); i++ {
if b.min[i] > node.max[i] || b.max[i] < node.min[i] {
return not
}
if node.min[i] > b.min[i] || b.max[i] > node.max[i] {
i++
for ; i < len(node.min); i++ {
if b.min[i] > node.max[i] || b.max[i] < node.min[i] {
return not
}
}
return intersects
}
}
return contains
}
func (node *treeNode) intersects(b *treeNode) bool {
for i := 0; i < len(node.min); i++ {
if b.min[i] > node.max[i] || b.max[i] < node.min[i] {
return false
}
}
return true
}
func (node *treeNode) findItem(item interface{}) int {
for i := 0; i < node.count; i++ {
if node.children[i].unsafeItem().item == item {
return i
}
}
return -1
}
func (node *treeNode) contains(b *treeNode) bool {
for i := 0; i < len(node.min); i++ {
if node.min[i] > b.min[i] || b.max[i] > node.max[i] {
return false
}
}
return true
}
func (node *treeNode) childCount() int {
if node.leaf {
return node.count
}
var n int
for i := 0; i < node.count; i++ {
n += node.children[i].childCount()
}
return n
}
type treeItem struct {
min, max [D]float64
item interface{}
}
func (item *treeItem) unsafeNode() *treeNode {
return (*treeNode)(unsafe.Pointer(item))
}
// RTree is an R-tree
type RTree struct {
maxEntries int
minEntries int
data *treeNode // root node
// resusable fields, these help performance of common mutable operations.
reuse struct {
path []*treeNode // for reinsertion path
indexes []int // for remove function
stack []int // for bulk loading
}
}
// New creates a new R-tree
func New() *RTree {
tr := &RTree{}
tr.maxEntries = int(math.Max(4, float64(M)))
tr.minEntries = int(math.Max(2, math.Ceil(float64(tr.maxEntries)*0.4)))
tr.data = createNode(nil)
return tr
}
// Insert inserts an item
func (tr *RTree) Insert(min, max [D]float64, item interface{}) {
if item == nil {
panic("nil item")
}
bbox := treeNode{min: min, max: max}
tr.insert(&bbox, item, tr.data.height-1, false)
}
func (tr *RTree) insert(bbox *treeNode, item interface{}, level int, isNode bool) {
tr.reuse.path = tr.reuse.path[:0]
node, insertPath := tr.chooseSubtree(bbox, tr.data, level, tr.reuse.path)
if item == nil {
// item is only nil when bulk loading a node
if node.leaf {
panic("loading node into leaf")
}
node.children[node.count] = bbox
node.count++
} else {
ti := &treeItem{min: bbox.min, max: bbox.max, item: item}
node.children[node.count] = ti.unsafeNode()
node.count++
}
node.extend(bbox)
for level >= 0 {
if insertPath[level].count > tr.maxEntries {
insertPath = tr.split(insertPath, level)
level--
} else {
break
}
}
tr.adjustParentBBoxes(bbox, insertPath, level)
tr.reuse.path = insertPath
}
func (tr *RTree) adjustParentBBoxes(bbox *treeNode, path []*treeNode, level int) {
// adjust bboxes along the given tree path
for i := level; i >= 0; i-- {
path[i].extend(bbox)
}
}
func (tr *RTree) chooseSubtree(bbox, node *treeNode, level int, path []*treeNode) (*treeNode, []*treeNode) {
var targetNode *treeNode
var area, enlargement, minArea, minEnlargement float64
for {
path = append(path, node)
if node.leaf || len(path)-1 == level {
break
}
minEnlargement = mathInfPos
minArea = minEnlargement
for i := 0; i < node.count; i++ {
child := node.children[i]
area = child.area()
enlargement = bbox.enlargedArea(child) - area
if enlargement < minEnlargement {
minEnlargement = enlargement
if area < minArea {
minArea = area
}
targetNode = child
} else if enlargement == minEnlargement {
if area < minArea {
minArea = area
targetNode = child
}
}
}
if targetNode != nil {
node = targetNode
} else if node.count > 0 {
node = (*treeNode)(node.children[0])
} else {
node = nil
}
}
return node, path
}
func (tr *RTree) split(insertPath []*treeNode, level int) []*treeNode {
var node = insertPath[level]
var M = node.count
var m = tr.minEntries
tr.chooseSplitAxis(node, m, M)
splitIndex := tr.chooseSplitIndex(node, m, M)
spliced := make([]*treeNode, node.count-splitIndex)
copy(spliced, node.children[splitIndex:])
node.count = splitIndex
newNode := createNode(spliced)
newNode.height = node.height
newNode.leaf = node.leaf
tr.calcBBox(node)
tr.calcBBox(newNode)
if level != 0 {
insertPath[level-1].children[insertPath[level-1].count] = newNode
insertPath[level-1].count++
} else {
tr.splitRoot(node, newNode)
}
return insertPath
}
func (tr *RTree) chooseSplitIndex(node *treeNode, m, M int) int {
var i int
var bbox1, bbox2 *treeNode
var overlap, area, minOverlap, minArea float64
var index int
minArea = mathInfPos
minOverlap = minArea
for i = m; i <= M-m; i++ {
bbox1 = tr.distBBox(node, 0, i, nil)
bbox2 = tr.distBBox(node, i, M, nil)
overlap = bbox1.intersectionArea(bbox2)
area = bbox1.area() + bbox2.area()
// choose distribution with minimum overlap
if overlap < minOverlap {
minOverlap = overlap
index = i
if area < minArea {
minArea = area
}
} else if overlap == minOverlap {
// otherwise choose distribution with minimum area
if area < minArea {
minArea = area
index = i
}
}
}
return index
}
func (tr *RTree) calcBBox(node *treeNode) {
tr.distBBox(node, 0, node.count, node)
}
func (tr *RTree) chooseSplitAxis(node *treeNode, m, M int) {
minMargin := tr.allDistMargin(node, m, M, 0)
var minAxis int
for axis := 1; axis < D; axis++ {
margin := tr.allDistMargin(node, m, M, axis)
if margin < minMargin {
minMargin = margin
minAxis = axis
}
}
if minAxis < D {
tr.sortNodes(node, minAxis)
}
}
func (tr *RTree) splitRoot(node, newNode *treeNode) {
tr.data = createNode([]*treeNode{node, newNode})
tr.data.height = node.height + 1
tr.data.leaf = false
tr.calcBBox(tr.data)
}
func (tr *RTree) distBBox(node *treeNode, k, p int, destNode *treeNode) *treeNode {
if destNode == nil {
destNode = createNode(nil)
} else {
for i := 0; i < D; i++ {
destNode.min[i] = mathInfPos
destNode.max[i] = mathInfNeg
}
}
for i := k; i < p; i++ {
if node.leaf {
destNode.extend(node.children[i])
} else {
destNode.extend((*treeNode)(node.children[i]))
}
}
return destNode
}
func (tr *RTree) allDistMargin(node *treeNode, m, M int, axis int) float64 {
tr.sortNodes(node, axis)
var leftBBox = tr.distBBox(node, 0, m, nil)
var rightBBox = tr.distBBox(node, M-m, M, nil)
var margin = leftBBox.margin() + rightBBox.margin()
var i int
if node.leaf {
for i = m; i < M-m; i++ {
leftBBox.extend(node.children[i])
margin += leftBBox.margin()
}
for i = M - m - 1; i >= m; i-- {
leftBBox.extend(node.children[i])
margin += rightBBox.margin()
}
} else {
for i = m; i < M-m; i++ {
child := (*treeNode)(node.children[i])
leftBBox.extend(child)
margin += leftBBox.margin()
}
for i = M - m - 1; i >= m; i-- {
child := (*treeNode)(node.children[i])
leftBBox.extend(child)
margin += rightBBox.margin()
}
}
return margin
}
func (tr *RTree) sortNodes(node *treeNode, axis int) {
sortByAxis(node.children[:node.count], axis)
}
func sortByAxis(items []*treeNode, axis int) {
if len(items) < 2 {
return
}
left, right := 0, len(items)-1
pivotIndex := len(items) / 2
items[pivotIndex], items[right] = items[right], items[pivotIndex]
for i := range items {
if items[i].min[axis] < items[right].min[axis] {
items[i], items[left] = items[left], items[i]
left++
}
}
items[left], items[right] = items[right], items[left]
sortByAxis(items[:left], axis)
sortByAxis(items[left+1:], axis)
}
// Search searches the tree for items in the input rectangle
func (tr *RTree) Search(min, max [D]float64, iter func(item interface{}) bool) bool {
bbox := &treeNode{min: min, max: max}
if !tr.data.intersects(bbox) {
return true
}
return tr.search(tr.data, bbox, iter)
}
func (tr *RTree) search(node, bbox *treeNode, iter func(item interface{}) bool) bool {
if node.leaf {
for i := 0; i < node.count; i++ {
if bbox.intersects(node.children[i]) {
if !iter(node.children[i].unsafeItem().item) {
return false
}
}
}
} else {
for i := 0; i < node.count; i++ {
r := bbox.overlaps(node.children[i])
if r == intersects {
if !tr.search(node.children[i], bbox, iter) {
return false
}
} else if r == contains {
if !scan(node.children[i], iter) {
return false
}
}
}
}
return true
}
// Remove removes an item from the R-tree.
func (tr *RTree) Remove(min, max [D]float64, item interface{}) {
bbox := &treeNode{min: min, max: max}
tr.remove(bbox, item)
}
func (tr *RTree) remove(bbox *treeNode, item interface{}) {
path := tr.reuse.path[:0]
indexes := tr.reuse.indexes[:0]
var node = tr.data
var i int
var parent *treeNode
var index int
var goingUp bool
for node != nil || len(path) != 0 {
if node == nil {
node = path[len(path)-1]
path = path[:len(path)-1]
if len(path) == 0 {
parent = nil
} else {
parent = path[len(path)-1]
}
i = indexes[len(indexes)-1]
indexes = indexes[:len(indexes)-1]
goingUp = true
}
if node.leaf {
index = node.findItem(item)
if index != -1 {
// item found, remove the item and condense tree upwards
copy(node.children[index:], node.children[index+1:])
node.children[node.count-1] = nil
node.count--
path = append(path, node)
tr.condense(path)
goto done
}
}
if !goingUp && !node.leaf && node.contains(bbox) { // go down
path = append(path, node)
indexes = append(indexes, i)
i = 0
parent = node
node = (*treeNode)(node.children[0])
} else if parent != nil { // go right
i++
if i == parent.count {
node = nil
} else {
node = (*treeNode)(parent.children[i])
}
goingUp = false
} else {
node = nil
}
}
done:
tr.reuse.path = path
tr.reuse.indexes = indexes
return
}
func (tr *RTree) condense(path []*treeNode) {
// go through the path, removing empty nodes and updating bboxes
var siblings []*treeNode
for i := len(path) - 1; i >= 0; i-- {
if path[i].count == 0 {
if i > 0 {
siblings = path[i-1].children[:path[i-1].count]
index := -1
for j := 0; j < len(siblings); j++ {
if siblings[j] == path[i] {
index = j
break
}
}
copy(siblings[index:], siblings[index+1:])
siblings[len(siblings)-1] = nil
path[i-1].count--
//siblings = siblings[:len(siblings)-1]
//path[i-1].children = siblings
} else {
tr.data = createNode(nil) // clear tree
}
} else {
tr.calcBBox(path[i])
}
}
}
// Count returns the number of items in the R-tree.
func (tr *RTree) Count() int {
return tr.data.childCount()
}
// Traverse iterates over the entire R-tree and includes all nodes and items.
func (tr *RTree) Traverse(iter func(min, max [D]float64, level int, item interface{}) bool) bool {
return tr.traverse(tr.data, iter)
}
func (tr *RTree) traverse(node *treeNode, iter func(min, max [D]float64, level int, item interface{}) bool) bool {
if !iter(node.min, node.max, int(node.height), nil) {
return false
}
if node.leaf {
for i := 0; i < node.count; i++ {
child := node.children[i]
if !iter(child.min, child.max, 0, child.unsafeItem().item) {
return false
}
}
} else {
for i := 0; i < node.count; i++ {
child := node.children[i]
if !tr.traverse(child, iter) {
return false
}
}
}
return true
}
// Scan iterates over the entire R-tree
func (tr *RTree) Scan(iter func(item interface{}) bool) bool {
return scan(tr.data, iter)
}
func scan(node *treeNode, iter func(item interface{}) bool) bool {
if node.leaf {
for i := 0; i < node.count; i++ {
child := node.children[i]
if !iter(child.unsafeItem().item) {
return false
}
}
} else {
for i := 0; i < node.count; i++ {
child := node.children[i]
if !scan(child, iter) {
return false
}
}
}
return true
}
// Bounds returns the bounding box of the entire R-tree
func (tr *RTree) Bounds() (min, max [D]float64) {
if tr.data.count > 0 {
min, max = tr.data.min, tr.data.max
}
return
}
// Complexity returns the complexity of the R-tree. The higher the value, the
// more complex the tree. The value of 1 is the lowest.
func (tr *RTree) Complexity() float64 {
var nodeCount int
var itemCount int
tr.Traverse(func(_, _ [D]float64, level int, _ interface{}) bool {
if level == 0 {
itemCount++
} else {
nodeCount++
}
return true
})
return float64(tr.maxEntries*nodeCount) / float64(itemCount)
}

554
index/rtreebase/base_test.go Normal file
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@ -0,0 +1,554 @@
package rtreebase
import (
"fmt"
"log"
"math"
"math/rand"
"runtime"
"sort"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
type Rect struct {
min, max [D]float64
item interface{}
}
func ptrMakePoint(vals ...float64) *Rect {
var r Rect
for i := 0; i < D && i < len(vals); i++ {
r.min[i] = vals[i]
r.max[i] = vals[i]
}
r.item = &r
return &r
}
func ptrMakeRect(vals ...float64) *Rect {
var r Rect
for i := 0; i < D && i < len(vals); i++ {
r.min[i] = vals[i]
r.max[i] = vals[i+D]
}
r.item = &r
return &r
}
func TestRTree(t *testing.T) {
tr := New()
p := ptrMakePoint(10, 10)
tr.Insert(p.min, p.max, p.item)
}
func TestPtrBasic2D(t *testing.T) {
if D != 2 {
return
}
tr := New()
p1 := ptrMakePoint(-115, 33)
p2 := ptrMakePoint(-113, 35)
tr.Insert(p1.min, p1.max, p1.item)
tr.Insert(p2.min, p2.max, p2.item)
assert.Equal(t, 2, tr.Count())
var points []*Rect
bbox := ptrMakeRect(-116, 32, -114, 34)
tr.Search(bbox.min, bbox.max, func(item interface{}) bool {
points = append(points, item.(*Rect))
return true
})
assert.Equal(t, 1, len(points))
tr.Remove(p1.min, p1.max, p1.item)
assert.Equal(t, 1, tr.Count())
points = nil
bbox = ptrMakeRect(-116, 33, -114, 34)
tr.Search(bbox.min, bbox.max, func(item interface{}) bool {
points = append(points, item.(*Rect))
return true
})
assert.Equal(t, 0, len(points))
tr.Remove(p2.min, p2.max, p2.item)
assert.Equal(t, 0, tr.Count())
}
func getMemStats() runtime.MemStats {
runtime.GC()
time.Sleep(time.Millisecond)
runtime.GC()
var ms runtime.MemStats
runtime.ReadMemStats(&ms)
return ms
}
func ptrMakeRandom(what string) *Rect {
if what == "point" {
vals := make([]float64, D)
for i := 0; i < D; i++ {
if i == 0 {
vals[i] = rand.Float64()*360 - 180
} else if i == 1 {
vals[i] = rand.Float64()*180 - 90
} else {
vals[i] = rand.Float64()*100 - 50
}
}
return ptrMakePoint(vals...)
} else if what == "rect" {
vals := make([]float64, D)
for i := 0; i < D; i++ {
if i == 0 {
vals[i] = rand.Float64()*340 - 170
} else if i == 1 {
vals[i] = rand.Float64()*160 - 80
} else {
vals[i] = rand.Float64()*80 - 30
}
}
rvals := make([]float64, D*2)
for i := 0; i < D; i++ {
rvals[i] = vals[i] - rand.Float64()*10
rvals[D+i] = vals[i] + rand.Float64()*10
}
return ptrMakeRect(rvals...)
}
panic("??")
}
func TestPtrRandom(t *testing.T) {
t.Run(fmt.Sprintf("%dD", D), func(t *testing.T) {
t.Run("point", func(t *testing.T) { ptrTestRandom(t, "point", 10000) })
t.Run("rect", func(t *testing.T) { ptrTestRandom(t, "rect", 10000) })
})
}
func ptrTestRandom(t *testing.T, which string, n int) {
fmt.Println("-------------------------------------------------")
fmt.Printf("Testing Random %dD %ss\n", D, which)
fmt.Println("-------------------------------------------------")
rand.Seed(time.Now().UnixNano())
tr := New()
min, max := tr.Bounds()
assert.Equal(t, make([]float64, D), min[:])
assert.Equal(t, make([]float64, D), max[:])
// create random objects
m1 := getMemStats()
objs := make([]*Rect, n)
for i := 0; i < n; i++ {
objs[i] = ptrMakeRandom(which)
}
// insert the objects into tree
m2 := getMemStats()
start := time.Now()
for _, r := range objs {
tr.Insert(r.min, r.max, r.item)
}
durInsert := time.Since(start)
m3 := getMemStats()
assert.Equal(t, len(objs), tr.Count())
fmt.Printf("Inserted %d random %ss in %dms -- %d ops/sec\n",
len(objs), which, int(durInsert.Seconds()*1000),
int(float64(len(objs))/durInsert.Seconds()))
fmt.Printf(" total cost is %d bytes/%s\n", int(m3.HeapAlloc-m1.HeapAlloc)/len(objs), which)
fmt.Printf(" tree cost is %d bytes/%s\n", int(m3.HeapAlloc-m2.HeapAlloc)/len(objs), which)
fmt.Printf(" tree overhead %d%%\n", int((float64(m3.HeapAlloc-m2.HeapAlloc)/float64(len(objs)))/(float64(m3.HeapAlloc-m1.HeapAlloc)/float64(len(objs)))*100))
fmt.Printf(" complexity %f\n", tr.Complexity())
start = time.Now()
// count all nodes and leaves
var nodes int
var leaves int
var maxLevel int
tr.Traverse(func(min, max [D]float64, level int, item interface{}) bool {
if level != 0 {
nodes++
}
if level == 1 {
leaves++
}
if level > maxLevel {
maxLevel = level
}
return true
})
fmt.Printf(" nodes: %d, leaves: %d, level: %d\n", nodes, leaves, maxLevel)
// verify mbr
for i := 0; i < D; i++ {
min[i] = math.Inf(+1)
max[i] = math.Inf(-1)
}
for _, o := range objs {
for i := 0; i < D; i++ {
if o.min[i] < min[i] {
min[i] = o.min[i]
}
if o.max[i] > max[i] {
max[i] = o.max[i]
}
}
}
minb, maxb := tr.Bounds()
assert.Equal(t, min, minb)
assert.Equal(t, max, maxb)
// scan
var arr []*Rect
tr.Scan(func(item interface{}) bool {
arr = append(arr, item.(*Rect))
return true
})
assert.True(t, ptrTestHasSameItems(objs, arr))
// search
ptrTestSearch(t, tr, objs, 0.10, true)
ptrTestSearch(t, tr, objs, 0.50, true)
ptrTestSearch(t, tr, objs, 1.00, true)
// knn
ptrTestKNN(t, tr, objs, int(float64(len(objs))*0.01), true)
ptrTestKNN(t, tr, objs, int(float64(len(objs))*0.50), true)
ptrTestKNN(t, tr, objs, int(float64(len(objs))*1.00), true)
// remove all objects
indexes := rand.Perm(len(objs))
start = time.Now()
for _, i := range indexes {
tr.Remove(objs[i].min, objs[i].max, objs[i].item)
}
durRemove := time.Since(start)
assert.Equal(t, 0, tr.Count())
fmt.Printf("Removed %d random %ss in %dms -- %d ops/sec\n",
len(objs), which, int(durRemove.Seconds()*1000),
int(float64(len(objs))/durRemove.Seconds()))
min, max = tr.Bounds()
assert.Equal(t, make([]float64, D), min[:])
assert.Equal(t, make([]float64, D), max[:])
}
func ptrTestHasSameItems(a1, a2 []*Rect) bool {
if len(a1) != len(a2) {
return false
}
for _, p1 := range a1 {
var found bool
for _, p2 := range a2 {
if *p1 == *p2 {
found = true
break
}
}
if !found {
return false
}
}
return true
}
func ptrTestSearch(t *testing.T, tr *RTree, objs []*Rect, percent float64, check bool) {
var found int
var start time.Time
var stop time.Time
defer func() {
dur := stop.Sub(start)
fmt.Printf("Searched %.0f%% (%d/%d items) in %dms -- %d ops/sec\n",
percent*100, found, len(objs), int(dur.Seconds()*1000),
int(float64(1)/dur.Seconds()),
)
}()
min, max := tr.Bounds()
vals := make([]float64, D*2)
for i := 0; i < D; i++ {
vals[i] = ((max[i]+min[i])/2 - ((max[i]-min[i])*percent)/2)
vals[D+i] = ((max[i]+min[i])/2 + ((max[i]-min[i])*percent)/2)
}
var arr1 []*Rect
var box *Rect
if percent == 1 {
box = ptrMakeRect(append(append([]float64{}, min[:]...), max[:]...)...)
} else {
box = ptrMakeRect(vals...)
}
start = time.Now()
tr.Search(box.min, box.max, func(item interface{}) bool {
if check {
arr1 = append(arr1, item.(*Rect))
}
found++
return true
})
stop = time.Now()
if !check {
return
}
var arr2 []*Rect
for _, obj := range objs {
if ptrTestIntersects(obj, box) {
arr2 = append(arr2, obj)
}
}
assert.Equal(t, len(arr1), len(arr2))
for _, o1 := range arr1 {
var found bool
for _, o2 := range arr2 {
if *o2 == *o1 {
found = true
break
}
}
if !found {
t.Fatalf("not found")
}
}
}
func ptrTestKNN(t *testing.T, tr *RTree, objs []*Rect, n int, check bool) {
var start time.Time
var stop time.Time
defer func() {
dur := stop.Sub(start)
fmt.Printf("KNN %d items in %dms -- %d ops/sec\n",
n, int(dur.Seconds()*1000),
int(float64(1)/dur.Seconds()),
)
}()
min, max := tr.Bounds()
pvals := make([]float64, D)
for i := 0; i < D; i++ {
pvals[i] = (max[i] + min[i]) / 2
}
point := ptrMakePoint(pvals...)
// gather the results, make sure that is matches exactly
var arr1 []Rect
var dists1 []float64
pdist := math.Inf(-1)
start = time.Now()
tr.KNN(point.min, point.max, false, func(item interface{}, dist float64) bool {
if len(arr1) == n {
return false
}
arr1 = append(arr1, Rect{min: min, max: max, item: item})
dists1 = append(dists1, dist)
if dist < pdist {
panic("dist out of order")
}
pdist = dist
return true
})
stop = time.Now()
assert.True(t, n > len(objs) || n == len(arr1))
// get the KNN for the original array
nobjs := make([]*Rect, len(objs))
copy(nobjs, objs)
sort.Slice(nobjs, func(i, j int) bool {
idist := ptrTestBoxDist(pvals, nobjs[i].min, nobjs[i].max)
jdist := ptrTestBoxDist(pvals, nobjs[j].min, nobjs[j].max)
return idist < jdist
})
arr2 := nobjs[:len(arr1)]
var dists2 []float64
for i := 0; i < len(arr2); i++ {
dist := ptrTestBoxDist(pvals, arr2[i].min, arr2[i].max)
dists2 = append(dists2, dist)
}
// only compare the distances, not the objects because rectangles with
// a dist of zero will not be ordered.
assert.Equal(t, dists1, dists2)
}
func ptrTestBoxDist(point []float64, min, max [D]float64) float64 {
var dist float64
for i := 0; i < len(point); i++ {
d := ptrTestAxisDist(point[i], min[i], max[i])
dist += d * d
}
return dist
}
func ptrTestAxisDist(k, min, max float64) float64 {
if k < min {
return min - k
}
if k <= max {
return 0
}
return k - max
}
func ptrTestIntersects(obj, box *Rect) bool {
for i := 0; i < D; i++ {
if box.min[i] > obj.max[i] || box.max[i] < obj.min[i] {
return false
}
}
return true
}
// func TestPtrInsertFlatPNG2D(t *testing.T) {
// fmt.Println("-------------------------------------------------")
// fmt.Println("Generating Cities PNG 2D (flat-insert-2d.png)")
// fmt.Println("-------------------------------------------------")
// tr := New()
// var items []*Rect
// c := cities.Cities
// for i := 0; i < len(c); i++ {
// x := c[i].Longitude
// y := c[i].Latitude
// items = append(items, ptrMakePoint(x, y))
// }
// start := time.Now()
// for _, item := range items {
// tr.Insert(item.min, item.max, item.item)
// }
// dur := time.Since(start)
// fmt.Printf("wrote %d cities (flat) in %s (%.0f/ops)\n", len(c), dur, float64(len(c))/dur.Seconds())
// withGIF := os.Getenv("GIFOUTPUT") != ""
// if err := tr.SavePNG("ptr-flat-insert-2d.png", 1000, 1000, 1.25/360.0, 0, true, withGIF, os.Stdout); err != nil {
// t.Fatal(err)
// }
// if !withGIF {
// fmt.Println("use GIFOUTPUT=1 for animated gif")
// }
// }
// func TestPtrLoadFlatPNG2D(t *testing.T) {
// fmt.Println("-------------------------------------------------")
// fmt.Println("Generating Cities 2D PNG (flat-load-2d.png)")
// fmt.Println("-------------------------------------------------")
// tr := New()
// var items []*Rect
// c := cities.Cities
// for i := 0; i < len(c); i++ {
// x := c[i].Longitude
// y := c[i].Latitude
// items = append(items, ptrMakePoint(x, y))
// }
// var mins [][D]float64
// var maxs [][D]float64
// var ifs []interface{}
// for i := 0; i < len(items); i++ {
// mins = append(mins, items[i].min)
// maxs = append(maxs, items[i].max)
// ifs = append(ifs, items[i].item)
// }
// start := time.Now()
// tr.Load(mins, maxs, ifs)
// dur := time.Since(start)
// if true {
// var all []*Rect
// tr.Scan(func(min, max [D]float64, item interface{}) bool {
// all = append(all, &Rect{min: min, max: max, item: item})
// return true
// })
// assert.Equal(t, len(all), len(items))
// for len(all) > 0 {
// item := all[0]
// var found bool
// for _, city := range items {
// if *city == *item {
// found = true
// break
// }
// }
// if !found {
// t.Fatal("item not found")
// }
// all = all[1:]
// }
// }
// fmt.Printf("wrote %d cities (flat) in %s (%.0f/ops)\n", len(c), dur, float64(len(c))/dur.Seconds())
// withGIF := os.Getenv("GIFOUTPUT") != ""
// if err := tr.SavePNG("ptr-flat-load-2d.png", 1000, 1000, 1.25/360.0, 0, true, withGIF, os.Stdout); err != nil {
// t.Fatal(err)
// }
// if !withGIF {
// fmt.Println("use GIFOUTPUT=1 for animated gif")
// }
// }
func TestBenchmarks(t *testing.T) {
var points []*Rect
for i := 0; i < 2000000; i++ {
x := rand.Float64()*360 - 180
y := rand.Float64()*180 - 90
points = append(points, ptrMakePoint(x, y))
}
tr := New()
start := time.Now()
for i := len(points) / 2; i < len(points); i++ {
tr.Insert(points[i].min, points[i].max, points[i].item)
}
dur := time.Since(start)
log.Printf("insert 1M items one by one: %.3fs", dur.Seconds())
////
rarr := rand.Perm(len(points) / 2)
start = time.Now()
for i := 0; i < len(points)/2; i++ {
a := points[rarr[i]+len(points)/2]
b := points[rarr[i]]
tr.Remove(a.min, a.max, a.item)
tr.Insert(b.min, b.max, b.item)
}
dur = time.Since(start)
log.Printf("replaced 1M items one by one: %.3fs", dur.Seconds())
points = points[:len(points)/2]
////
start = time.Now()
for i := 0; i < 1000; i++ {
tr.Remove(points[i].min, points[i].max, points[i].item)
}
dur = time.Since(start)
log.Printf("remove 100 items one by one: %.3fs", dur.Seconds())
////
bbox := ptrMakeRect(0, 0, 0+(360*0.0001), 0+(180*0.0001))
start = time.Now()
for i := 0; i < 1000; i++ {
tr.Search(bbox.min, bbox.max, func(_ interface{}) bool { return true })
}
dur = time.Since(start)
log.Printf("1000 searches of 0.01%% area: %.3fs", dur.Seconds())
////
bbox = ptrMakeRect(0, 0, 0+(360*0.01), 0+(180*0.01))
start = time.Now()
for i := 0; i < 1000; i++ {
tr.Search(bbox.min, bbox.max, func(_ interface{}) bool { return true })
}
dur = time.Since(start)
log.Printf("1000 searches of 1%% area: %.3fs", dur.Seconds())
////
bbox = ptrMakeRect(0, 0, 0+(360*0.10), 0+(180*0.10))
start = time.Now()
for i := 0; i < 1000; i++ {
tr.Search(bbox.min, bbox.max, func(_ interface{}) bool { return true })
}
dur = time.Since(start)
log.Printf("1000 searches of 10%% area: %.3fs", dur.Seconds())
///
var mins [][D]float64
var maxs [][D]float64
var items []interface{}
for i := 0; i < len(points); i++ {
mins = append(mins, points[i].min)
maxs = append(maxs, points[i].max)
items = append(items, points[i].item)
}
tr = New()
start = time.Now()
tr.Load(mins, maxs, items)
dur = time.Since(start)
log.Printf("bulk-insert 1M items: %.3fs", dur.Seconds())
}

104
index/rtreebase/draw.go-bak Normal file
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@ -0,0 +1,104 @@
package rtreebase
import (
"fmt"
"image/color"
"io"
"math"
"os"
"os/exec"
"strings"
"github.com/tidwall/pinhole"
)
// SavePNG draws and saves an image of the R-tree
func (tr *RTree) SavePNG(path string, width, height int, scale, rotateY float64, showNodes bool, withGIF bool, printer io.Writer) error {
return tr.savePNG2D(path, width, height, scale, rotateY, showNodes, withGIF, printer)
}
func (tr *RTree) savePNG2D(path string, width, height int, scale, rotateY float64, showNodes bool, withGIF bool, printer io.Writer) error {
p := pinhole.New()
tr.Traverse(func(min, max [D]float64, level int, item interface{}) bool {
p.Begin()
if level > 0 && showNodes {
p.DrawCube(min[0], min[1], 0, max[0], max[1], 0)
switch level {
default:
p.Colorize(color.RGBA{64, 64, 64, 128})
case 1:
p.Colorize(color.RGBA{32, 64, 32, 64})
case 2:
p.Colorize(color.RGBA{48, 48, 96, 96})
case 3:
p.Colorize(color.RGBA{96, 128, 128, 128})
case 4:
p.Colorize(color.RGBA{128, 128, 196, 196})
}
} else {
p.DrawDot(min[0], min[1], 0, 0.05)
p.Colorize(color.White)
}
p.End()
return true
})
p.Scale(scale, scale, scale)
p.Rotate(0, rotateY, 0)
// render the paths in an image
opts := *pinhole.DefaultImageOptions
opts.LineWidth = 0.025
opts.BGColor = color.Black
if err := p.SavePNG(path, width, height, &opts); err != nil {
return err
}
if printer != nil {
fmt.Fprintf(printer, "wrote %s\n", path)
}
if withGIF {
if err := createGIF(p, width, height, path, &opts, printer); err != nil {
return err
}
}
return nil
}
func createGIF(p *pinhole.Pinhole, width, height int, path string, opts *pinhole.ImageOptions, printer io.Writer) error {
if err := os.MkdirAll("frames", 0700); err != nil {
return err
}
//var palette = palette.WebSafe
//outGif := &gif.GIF{}
for i := 0; i < 120; i++ {
p.Rotate(0, math.Pi*2/120.0, 0)
if err := p.SavePNG(fmt.Sprintf("frames/%d.png", i), width, height, opts); err != nil {
return err
}
//inGif := image.NewPaletted(inPng.Bounds(), palette)
//draw.Draw(inGif, inPng.Bounds(), inPng, image.Point{}, draw.Src)
//outGif.Image = append(outGif.Image, inGif)
//outGif.Delay = append(outGif.Delay, 0)
if printer != nil {
fmt.Fprintf(printer, "wrote frame %d/%d\n", i, 120)
}
}
if strings.HasSuffix(path, ".png") {
path = path[:len(path)-4] + ".gif"
}
_, err := exec.Command("ffmpeg", "-y", "-i", "frames/%d.png", path).CombinedOutput()
if err != nil {
return err
}
//ffmpeg -i frames/%d.png test.gif
//f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE, 0600)
//if err != nil {
// return err
//}
//defer f.Close()
//if err := gif.EncodeAll(f, outGif); err != nil {
// return err
//}
if printer != nil {
fmt.Fprintf(printer, "wrote %s\n", path)
}
return nil
}

96
index/rtreebase/knn.go Normal file
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@ -0,0 +1,96 @@
package rtreebase
import "github.com/tidwall/tinyqueue"
type queueItem struct {
node *treeNode
isItem bool
dist float64
}
func (item *queueItem) Less(b tinyqueue.Item) bool {
return item.dist < b.(*queueItem).dist
}
// KNN returns items nearest to farthest. The dist param is the "box distance".
func (tr *RTree) KNN(min, max [D]float64, center bool, iter func(item interface{}, dist float64) bool) bool {
var isBox bool
var knnPoint [D]float64
bbox := &treeNode{min: min, max: max}
for i := 0; i < D; i++ {
knnPoint[i] = (bbox.min[i] + bbox.max[i]) / 2
if !isBox && bbox.min[i] != bbox.max[i] {
isBox = true
}
}
node := tr.data
queue := tinyqueue.New(nil)
for node != nil {
for i := 0; i < node.count; i++ {
child := node.children[i]
var dist float64
if isBox {
dist = boxDistRect(bbox, child)
} else {
dist = boxDistPoint(knnPoint, child)
}
queue.Push(&queueItem{node: child, isItem: node.leaf, dist: dist})
}
for queue.Len() > 0 && queue.Peek().(*queueItem).isItem {
item := queue.Pop().(*queueItem)
if !iter(item.node.unsafeItem().item, item.dist) {
return false
}
}
last := queue.Pop()
if last != nil {
node = (*treeNode)(last.(*queueItem).node)
} else {
node = nil
}
}
return true
}
func boxDistRect(a, b *treeNode) float64 {
var dist float64
for i := 0; i < len(a.min); i++ {
var min, max float64
if a.min[i] > b.min[i] {
min = a.min[i]
} else {
min = b.min[i]
}
if a.max[i] < b.max[i] {
max = a.max[i]
} else {
max = b.max[i]
}
squared := min - max
if squared > 0 {
dist += squared * squared
}
}
return dist
}
func boxDistPoint(point [D]float64, childBox *treeNode) float64 {
var dist float64
for i := 0; i < len(point); i++ {
d := axisDist(point[i], childBox.min[i], childBox.max[i])
dist += d * d
}
return dist
}
func axisDist(k, min, max float64) float64 {
if k < min {
return min - k
}
if k <= max {
return 0
}
return k - max
}

97
index/rtreebase/load.go Normal file
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@ -0,0 +1,97 @@
package rtreebase
import "math"
// Load bulk load items into the R-tree.
func (tr *RTree) Load(mins, maxs [][D]float64, items []interface{}) {
if len(items) < tr.minEntries {
for i := 0; i < len(items); i++ {
tr.Insert(mins[i], maxs[i], items[i])
}
return
}
// prefill the items
fitems := make([]*treeNode, len(items))
for i := 0; i < len(items); i++ {
item := &treeItem{min: mins[i], max: maxs[i], item: items[i]}
fitems[i] = item.unsafeNode()
}
// following equations are defined in the paper describing OMT
N := len(fitems)
M := tr.maxEntries
h := int(math.Ceil(math.Log(float64(N)) / math.Log(float64(M))))
Nsubtree := int(math.Pow(float64(M), float64(h-1)))
S := int(math.Ceil(math.Sqrt(float64(N) / float64(Nsubtree))))
// sort by the initial axis
axis := 0
sortByAxis(fitems, axis)
// build the root node. it's split differently from the subtrees.
children := make([]*treeNode, 0, S)
for i := 0; i < S; i++ {
var part []*treeNode
if i == S-1 {
// last split
part = fitems[len(fitems)/S*i:]
} else {
part = fitems[len(fitems)/S*i : len(fitems)/S*(i+1)]
}
children = append(children, tr.omt(part, h-1, axis+1))
}
node := createNode(children)
node.leaf = false
node.height = h
tr.calcBBox(node)
if tr.data.count == 0 {
// save as is if tree is empty
tr.data = node
} else if tr.data.height == node.height {
// split root if trees have the same height
tr.splitRoot(tr.data, node)
} else {
if tr.data.height < node.height {
// swap trees if inserted one is bigger
tr.data, node = node, tr.data
}
// insert the small tree into the large tree at appropriate level
tr.insert(node, nil, tr.data.height-node.height-1, true)
}
}
func (tr *RTree) omt(fitems []*treeNode, h, axis int) *treeNode {
if len(fitems) <= tr.maxEntries {
// reached leaf level; return leaf
children := make([]*treeNode, len(fitems))
copy(children, fitems)
node := createNode(children)
node.height = h
tr.calcBBox(node)
return node
}
// sort the items on a different axis than the previous level.
sortByAxis(fitems, axis%D)
children := make([]*treeNode, 0, tr.maxEntries)
partsz := len(fitems) / tr.maxEntries
for i := 0; i < tr.maxEntries; i++ {
var part []*treeNode
if i == tr.maxEntries-1 {
// last part
part = fitems[partsz*i:]
} else {
part = fitems[partsz*i : partsz*(i+1)]
}
children = append(children, tr.omt(part, h-1, axis+1))
}
node := createNode(children)
node.height = h
node.leaf = false
tr.calcBBox(node)
return node
}

8
tests/keys_test.go
View File

@ -34,14 +34,14 @@ func subTestKeys(t *testing.T, mc *mockServer) {
func keys_BOUNDS_test(mc *mockServer) error {
return mc.DoBatch([][]interface{}{
{"SET", "mykey", "myid1", "POINT", 33, -115}, {"OK"},
{"BOUNDS", "mykey"}, {"[[-115 33 0] [-115 33 0]]"},
{"BOUNDS", "mykey"}, {"[[-115 33] [-115 33]]"},
{"SET", "mykey", "myid2", "POINT", 34, -112}, {"OK"},
{"BOUNDS", "mykey"}, {"[[-115 33 0] [-112 34 0]]"},
{"BOUNDS", "mykey"}, {"[[-115 33] [-112 34]]"},
{"DEL", "mykey", "myid2"}, {1},
{"BOUNDS", "mykey"}, {"[[-115 33 0] [-115 33 0]]"},
{"BOUNDS", "mykey"}, {"[[-115 33] [-115 33]]"},
{"SET", "mykey", "myid3", "OBJECT", `{"type":"Point","coordinates":[-130,38,10]}`}, {"OK"},
{"SET", "mykey", "myid4", "OBJECT", `{"type":"Point","coordinates":[-110,25,-8]}`}, {"OK"},
{"BOUNDS", "mykey"}, {"[[-130 25 -8] [-110 38 10]]"},
{"BOUNDS", "mykey"}, {"[[-130 25] [-110 38]]"},
})
}
func keys_DEL_test(mc *mockServer) error {

152
vendor/github.com/davecgh/go-spew/spew/bypass.go generated vendored Normal file
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@ -0,0 +1,152 @@
// Copyright (c) 2015-2016 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when the code is not running on Google App Engine, compiled by GopherJS, and
// "-tags safe" is not added to the go build command line. The "disableunsafe"
// tag is deprecated and thus should not be used.
// +build !js,!appengine,!safe,!disableunsafe
package spew
import (
"reflect"
"unsafe"
)
const (
// UnsafeDisabled is a build-time constant which specifies whether or
// not access to the unsafe package is available.
UnsafeDisabled = false
// ptrSize is the size of a pointer on the current arch.
ptrSize = unsafe.Sizeof((*byte)(nil))
)
var (
// offsetPtr, offsetScalar, and offsetFlag are the offsets for the
// internal reflect.Value fields. These values are valid before golang
// commit ecccf07e7f9d which changed the format. The are also valid
// after commit 82f48826c6c7 which changed the format again to mirror
// the original format. Code in the init function updates these offsets
// as necessary.
offsetPtr = ptrSize
offsetScalar = uintptr(0)
offsetFlag = ptrSize * 2
// flagKindWidth and flagKindShift indicate various bits that the
// reflect package uses internally to track kind information.
//
// flagRO indicates whether or not the value field of a reflect.Value is
// read-only.
//
// flagIndir indicates whether the value field of a reflect.Value is
// the actual data or a pointer to the data.
//
// These values are valid before golang commit 90a7c3c86944 which
// changed their positions. Code in the init function updates these
// flags as necessary.
flagKindWidth = uintptr(5)
flagKindShift = flagKindWidth - 1
flagRO = uintptr(1 << 0)
flagIndir = uintptr(1 << 1)
)
func init() {
// Older versions of reflect.Value stored small integers directly in the
// ptr field (which is named val in the older versions). Versions
// between commits ecccf07e7f9d and 82f48826c6c7 added a new field named
// scalar for this purpose which unfortunately came before the flag
// field, so the offset of the flag field is different for those
// versions.
//
// This code constructs a new reflect.Value from a known small integer
// and checks if the size of the reflect.Value struct indicates it has
// the scalar field. When it does, the offsets are updated accordingly.
vv := reflect.ValueOf(0xf00)
if unsafe.Sizeof(vv) == (ptrSize * 4) {
offsetScalar = ptrSize * 2
offsetFlag = ptrSize * 3
}
// Commit 90a7c3c86944 changed the flag positions such that the low
// order bits are the kind. This code extracts the kind from the flags
// field and ensures it's the correct type. When it's not, the flag
// order has been changed to the newer format, so the flags are updated
// accordingly.
upf := unsafe.Pointer(uintptr(unsafe.Pointer(&vv)) + offsetFlag)
upfv := *(*uintptr)(upf)
flagKindMask := uintptr((1<<flagKindWidth - 1) << flagKindShift)
if (upfv&flagKindMask)>>flagKindShift != uintptr(reflect.Int) {
flagKindShift = 0
flagRO = 1 << 5
flagIndir = 1 << 6
// Commit adf9b30e5594 modified the flags to separate the
// flagRO flag into two bits which specifies whether or not the
// field is embedded. This causes flagIndir to move over a bit
// and means that flagRO is the combination of either of the
// original flagRO bit and the new bit.
//
// This code detects the change by extracting what used to be
// the indirect bit to ensure it's set. When it's not, the flag
// order has been changed to the newer format, so the flags are
// updated accordingly.
if upfv&flagIndir == 0 {
flagRO = 3 << 5
flagIndir = 1 << 7
}
}
}
// unsafeReflectValue converts the passed reflect.Value into a one that bypasses
// the typical safety restrictions preventing access to unaddressable and
// unexported data. It works by digging the raw pointer to the underlying
// value out of the protected value and generating a new unprotected (unsafe)
// reflect.Value to it.
//
// This allows us to check for implementations of the Stringer and error
// interfaces to be used for pretty printing ordinarily unaddressable and
// inaccessible values such as unexported struct fields.
func unsafeReflectValue(v reflect.Value) (rv reflect.Value) {
indirects := 1
vt := v.Type()
upv := unsafe.Pointer(uintptr(unsafe.Pointer(&v)) + offsetPtr)
rvf := *(*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&v)) + offsetFlag))
if rvf&flagIndir != 0 {
vt = reflect.PtrTo(v.Type())
indirects++
} else if offsetScalar != 0 {
// The value is in the scalar field when it's not one of the
// reference types.
switch vt.Kind() {
case reflect.Uintptr:
case reflect.Chan:
case reflect.Func:
case reflect.Map:
case reflect.Ptr:
case reflect.UnsafePointer:
default:
upv = unsafe.Pointer(uintptr(unsafe.Pointer(&v)) +
offsetScalar)
}
}
pv := reflect.NewAt(vt, upv)
rv = pv
for i := 0; i < indirects; i++ {
rv = rv.Elem()
}
return rv
}

38
vendor/github.com/davecgh/go-spew/spew/bypasssafe.go generated vendored Normal file
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@ -0,0 +1,38 @@
// Copyright (c) 2015-2016 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when the code is running on Google App Engine, compiled by GopherJS, or
// "-tags safe" is added to the go build command line. The "disableunsafe"
// tag is deprecated and thus should not be used.
// +build js appengine safe disableunsafe
package spew
import "reflect"
const (
// UnsafeDisabled is a build-time constant which specifies whether or
// not access to the unsafe package is available.
UnsafeDisabled = true
)
// unsafeReflectValue typically converts the passed reflect.Value into a one
// that bypasses the typical safety restrictions preventing access to
// unaddressable and unexported data. However, doing this relies on access to
// the unsafe package. This is a stub version which simply returns the passed
// reflect.Value when the unsafe package is not available.
func unsafeReflectValue(v reflect.Value) reflect.Value {
return v
}

341
vendor/github.com/davecgh/go-spew/spew/common.go generated vendored Normal file
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@ -0,0 +1,341 @@
/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"bytes"
"fmt"
"io"
"reflect"
"sort"
"strconv"
)
// Some constants in the form of bytes to avoid string overhead. This mirrors
// the technique used in the fmt package.
var (
panicBytes = []byte("(PANIC=")
plusBytes = []byte("+")
iBytes = []byte("i")
trueBytes = []byte("true")
falseBytes = []byte("false")
interfaceBytes = []byte("(interface {})")
commaNewlineBytes = []byte(",\n")
newlineBytes = []byte("\n")
openBraceBytes = []byte("{")
openBraceNewlineBytes = []byte("{\n")
closeBraceBytes = []byte("}")
asteriskBytes = []byte("*")
colonBytes = []byte(":")
colonSpaceBytes = []byte(": ")
openParenBytes = []byte("(")
closeParenBytes = []byte(")")
spaceBytes = []byte(" ")
pointerChainBytes = []byte("->")
nilAngleBytes = []byte("<nil>")
maxNewlineBytes = []byte("<max depth reached>\n")
maxShortBytes = []byte("<max>")
circularBytes = []byte("<already shown>")
circularShortBytes = []byte("<shown>")
invalidAngleBytes = []byte("<invalid>")
openBracketBytes = []byte("[")
closeBracketBytes = []byte("]")
percentBytes = []byte("%")
precisionBytes = []byte(".")
openAngleBytes = []byte("<")
closeAngleBytes = []byte(">")
openMapBytes = []byte("map[")
closeMapBytes = []byte("]")
lenEqualsBytes = []byte("len=")
capEqualsBytes = []byte("cap=")
)
// hexDigits is used to map a decimal value to a hex digit.
var hexDigits = "0123456789abcdef"
// catchPanic handles any panics that might occur during the handleMethods
// calls.
func catchPanic(w io.Writer, v reflect.Value) {
if err := recover(); err != nil {
w.Write(panicBytes)
fmt.Fprintf(w, "%v", err)
w.Write(closeParenBytes)
}
}
// handleMethods attempts to call the Error and String methods on the underlying
// type the passed reflect.Value represents and outputes the result to Writer w.
//
// It handles panics in any called methods by catching and displaying the error
// as the formatted value.
func handleMethods(cs *ConfigState, w io.Writer, v reflect.Value) (handled bool) {
// We need an interface to check if the type implements the error or
// Stringer interface. However, the reflect package won't give us an
// interface on certain things like unexported struct fields in order
// to enforce visibility rules. We use unsafe, when it's available,
// to bypass these restrictions since this package does not mutate the
// values.
if !v.CanInterface() {
if UnsafeDisabled {
return false
}
v = unsafeReflectValue(v)
}
// Choose whether or not to do error and Stringer interface lookups against
// the base type or a pointer to the base type depending on settings.
// Technically calling one of these methods with a pointer receiver can
// mutate the value, however, types which choose to satisify an error or
// Stringer interface with a pointer receiver should not be mutating their
// state inside these interface methods.
if !cs.DisablePointerMethods && !UnsafeDisabled && !v.CanAddr() {
v = unsafeReflectValue(v)
}
if v.CanAddr() {
v = v.Addr()
}
// Is it an error or Stringer?
switch iface := v.Interface().(type) {
case error:
defer catchPanic(w, v)
if cs.ContinueOnMethod {
w.Write(openParenBytes)
w.Write([]byte(iface.Error()))
w.Write(closeParenBytes)
w.Write(spaceBytes)
return false
}
w.Write([]byte(iface.Error()))
return true
case fmt.Stringer:
defer catchPanic(w, v)
if cs.ContinueOnMethod {
w.Write(openParenBytes)
w.Write([]byte(iface.String()))
w.Write(closeParenBytes)
w.Write(spaceBytes)
return false
}
w.Write([]byte(iface.String()))
return true
}
return false
}
// printBool outputs a boolean value as true or false to Writer w.
func printBool(w io.Writer, val bool) {
if val {
w.Write(trueBytes)
} else {
w.Write(falseBytes)
}
}
// printInt outputs a signed integer value to Writer w.
func printInt(w io.Writer, val int64, base int) {
w.Write([]byte(strconv.FormatInt(val, base)))
}
// printUint outputs an unsigned integer value to Writer w.
func printUint(w io.Writer, val uint64, base int) {
w.Write([]byte(strconv.FormatUint(val, base)))
}
// printFloat outputs a floating point value using the specified precision,
// which is expected to be 32 or 64bit, to Writer w.
func printFloat(w io.Writer, val float64, precision int) {
w.Write([]byte(strconv.FormatFloat(val, 'g', -1, precision)))
}
// printComplex outputs a complex value using the specified float precision
// for the real and imaginary parts to Writer w.
func printComplex(w io.Writer, c complex128, floatPrecision int) {
r := real(c)
w.Write(openParenBytes)
w.Write([]byte(strconv.FormatFloat(r, 'g', -1, floatPrecision)))
i := imag(c)
if i >= 0 {
w.Write(plusBytes)
}
w.Write([]byte(strconv.FormatFloat(i, 'g', -1, floatPrecision)))
w.Write(iBytes)
w.Write(closeParenBytes)
}
// printHexPtr outputs a uintptr formatted as hexadecimal with a leading '0x'
// prefix to Writer w.
func printHexPtr(w io.Writer, p uintptr) {
// Null pointer.
num := uint64(p)
if num == 0 {
w.Write(nilAngleBytes)
return
}
// Max uint64 is 16 bytes in hex + 2 bytes for '0x' prefix
buf := make([]byte, 18)
// It's simpler to construct the hex string right to left.
base := uint64(16)
i := len(buf) - 1
for num >= base {
buf[i] = hexDigits[num%base]
num /= base
i--
}
buf[i] = hexDigits[num]
// Add '0x' prefix.
i--
buf[i] = 'x'
i--
buf[i] = '0'
// Strip unused leading bytes.
buf = buf[i:]
w.Write(buf)
}
// valuesSorter implements sort.Interface to allow a slice of reflect.Value
// elements to be sorted.
type valuesSorter struct {
values []reflect.Value
strings []string // either nil or same len and values
cs *ConfigState
}
// newValuesSorter initializes a valuesSorter instance, which holds a set of
// surrogate keys on which the data should be sorted. It uses flags in
// ConfigState to decide if and how to populate those surrogate keys.
func newValuesSorter(values []reflect.Value, cs *ConfigState) sort.Interface {
vs := &valuesSorter{values: values, cs: cs}
if canSortSimply(vs.values[0].Kind()) {
return vs
}
if !cs.DisableMethods {
vs.strings = make([]string, len(values))
for i := range vs.values {
b := bytes.Buffer{}
if !handleMethods(cs, &b, vs.values[i]) {
vs.strings = nil
break
}
vs.strings[i] = b.String()
}
}
if vs.strings == nil && cs.SpewKeys {
vs.strings = make([]string, len(values))
for i := range vs.values {
vs.strings[i] = Sprintf("%#v", vs.values[i].Interface())
}
}
return vs
}
// canSortSimply tests whether a reflect.Kind is a primitive that can be sorted
// directly, or whether it should be considered for sorting by surrogate keys
// (if the ConfigState allows it).
func canSortSimply(kind reflect.Kind) bool {
// This switch parallels valueSortLess, except for the default case.
switch kind {
case reflect.Bool:
return true
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
return true
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
return true
case reflect.Float32, reflect.Float64:
return true
case reflect.String:
return true
case reflect.Uintptr:
return true
case reflect.Array:
return true
}
return false
}
// Len returns the number of values in the slice. It is part of the
// sort.Interface implementation.
func (s *valuesSorter) Len() int {
return len(s.values)
}
// Swap swaps the values at the passed indices. It is part of the
// sort.Interface implementation.
func (s *valuesSorter) Swap(i, j int) {
s.values[i], s.values[j] = s.values[j], s.values[i]
if s.strings != nil {
s.strings[i], s.strings[j] = s.strings[j], s.strings[i]
}
}
// valueSortLess returns whether the first value should sort before the second
// value. It is used by valueSorter.Less as part of the sort.Interface
// implementation.
func valueSortLess(a, b reflect.Value) bool {
switch a.Kind() {
case reflect.Bool:
return !a.Bool() && b.Bool()
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
return a.Int() < b.Int()
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
return a.Uint() < b.Uint()
case reflect.Float32, reflect.Float64:
return a.Float() < b.Float()
case reflect.String:
return a.String() < b.String()
case reflect.Uintptr:
return a.Uint() < b.Uint()
case reflect.Array:
// Compare the contents of both arrays.
l := a.Len()
for i := 0; i < l; i++ {
av := a.Index(i)
bv := b.Index(i)
if av.Interface() == bv.Interface() {
continue
}
return valueSortLess(av, bv)
}
}
return a.String() < b.String()
}
// Less returns whether the value at index i should sort before the
// value at index j. It is part of the sort.Interface implementation.
func (s *valuesSorter) Less(i, j int) bool {
if s.strings == nil {
return valueSortLess(s.values[i], s.values[j])
}
return s.strings[i] < s.strings[j]
}
// sortValues is a sort function that handles both native types and any type that
// can be converted to error or Stringer. Other inputs are sorted according to
// their Value.String() value to ensure display stability.
func sortValues(values []reflect.Value, cs *ConfigState) {
if len(values) == 0 {
return
}
sort.Sort(newValuesSorter(values, cs))
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew_test
import (
"fmt"
"reflect"
"testing"
"github.com/davecgh/go-spew/spew"
)
// custom type to test Stinger interface on non-pointer receiver.
type stringer string
// String implements the Stringer interface for testing invocation of custom
// stringers on types with non-pointer receivers.
func (s stringer) String() string {
return "stringer " + string(s)
}
// custom type to test Stinger interface on pointer receiver.
type pstringer string
// String implements the Stringer interface for testing invocation of custom
// stringers on types with only pointer receivers.
func (s *pstringer) String() string {
return "stringer " + string(*s)
}
// xref1 and xref2 are cross referencing structs for testing circular reference
// detection.
type xref1 struct {
ps2 *xref2
}
type xref2 struct {
ps1 *xref1
}
// indirCir1, indirCir2, and indirCir3 are used to generate an indirect circular
// reference for testing detection.
type indirCir1 struct {
ps2 *indirCir2
}
type indirCir2 struct {
ps3 *indirCir3
}
type indirCir3 struct {
ps1 *indirCir1
}
// embed is used to test embedded structures.
type embed struct {
a string
}
// embedwrap is used to test embedded structures.
type embedwrap struct {
*embed
e *embed
}
// panicer is used to intentionally cause a panic for testing spew properly
// handles them
type panicer int
func (p panicer) String() string {
panic("test panic")
}
// customError is used to test custom error interface invocation.
type customError int
func (e customError) Error() string {
return fmt.Sprintf("error: %d", int(e))
}
// stringizeWants converts a slice of wanted test output into a format suitable
// for a test error message.
func stringizeWants(wants []string) string {
s := ""
for i, want := range wants {
if i > 0 {
s += fmt.Sprintf("want%d: %s", i+1, want)
} else {
s += "want: " + want
}
}
return s
}
// testFailed returns whether or not a test failed by checking if the result
// of the test is in the slice of wanted strings.
func testFailed(result string, wants []string) bool {
for _, want := range wants {
if result == want {
return false
}
}
return true
}
type sortableStruct struct {
x int
}
func (ss sortableStruct) String() string {
return fmt.Sprintf("ss.%d", ss.x)
}
type unsortableStruct struct {
x int
}
type sortTestCase struct {
input []reflect.Value
expected []reflect.Value
}
func helpTestSortValues(tests []sortTestCase, cs *spew.ConfigState, t *testing.T) {
getInterfaces := func(values []reflect.Value) []interface{} {
interfaces := []interface{}{}
for _, v := range values {
interfaces = append(interfaces, v.Interface())
}
return interfaces
}
for _, test := range tests {
spew.SortValues(test.input, cs)
// reflect.DeepEqual cannot really make sense of reflect.Value,
// probably because of all the pointer tricks. For instance,
// v(2.0) != v(2.0) on a 32-bits system. Turn them into interface{}
// instead.
input := getInterfaces(test.input)
expected := getInterfaces(test.expected)
if !reflect.DeepEqual(input, expected) {
t.Errorf("Sort mismatch:\n %v != %v", input, expected)
}
}
}
// TestSortValues ensures the sort functionality for relect.Value based sorting
// works as intended.
func TestSortValues(t *testing.T) {
v := reflect.ValueOf
a := v("a")
b := v("b")
c := v("c")
embedA := v(embed{"a"})
embedB := v(embed{"b"})
embedC := v(embed{"c"})
tests := []sortTestCase{
// No values.
{
[]reflect.Value{},
[]reflect.Value{},
},
// Bools.
{
[]reflect.Value{v(false), v(true), v(false)},
[]reflect.Value{v(false), v(false), v(true)},
},
// Ints.
{
[]reflect.Value{v(2), v(1), v(3)},
[]reflect.Value{v(1), v(2), v(3)},
},
// Uints.
{
[]reflect.Value{v(uint8(2)), v(uint8(1)), v(uint8(3))},
[]reflect.Value{v(uint8(1)), v(uint8(2)), v(uint8(3))},
},
// Floats.
{
[]reflect.Value{v(2.0), v(1.0), v(3.0)},
[]reflect.Value{v(1.0), v(2.0), v(3.0)},
},
// Strings.
{
[]reflect.Value{b, a, c},
[]reflect.Value{a, b, c},
},
// Array
{
[]reflect.Value{v([3]int{3, 2, 1}), v([3]int{1, 3, 2}), v([3]int{1, 2, 3})},
[]reflect.Value{v([3]int{1, 2, 3}), v([3]int{1, 3, 2}), v([3]int{3, 2, 1})},
},
// Uintptrs.
{
[]reflect.Value{v(uintptr(2)), v(uintptr(1)), v(uintptr(3))},
[]reflect.Value{v(uintptr(1)), v(uintptr(2)), v(uintptr(3))},
},
// SortableStructs.
{
// Note: not sorted - DisableMethods is set.
[]reflect.Value{v(sortableStruct{2}), v(sortableStruct{1}), v(sortableStruct{3})},
[]reflect.Value{v(sortableStruct{2}), v(sortableStruct{1}), v(sortableStruct{3})},
},
// UnsortableStructs.
{
// Note: not sorted - SpewKeys is false.
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
},
// Invalid.
{
[]reflect.Value{embedB, embedA, embedC},
[]reflect.Value{embedB, embedA, embedC},
},
}
cs := spew.ConfigState{DisableMethods: true, SpewKeys: false}
helpTestSortValues(tests, &cs, t)
}
// TestSortValuesWithMethods ensures the sort functionality for relect.Value
// based sorting works as intended when using string methods.
func TestSortValuesWithMethods(t *testing.T) {
v := reflect.ValueOf
a := v("a")
b := v("b")
c := v("c")
tests := []sortTestCase{
// Ints.
{
[]reflect.Value{v(2), v(1), v(3)},
[]reflect.Value{v(1), v(2), v(3)},
},
// Strings.
{
[]reflect.Value{b, a, c},
[]reflect.Value{a, b, c},
},
// SortableStructs.
{
[]reflect.Value{v(sortableStruct{2}), v(sortableStruct{1}), v(sortableStruct{3})},
[]reflect.Value{v(sortableStruct{1}), v(sortableStruct{2}), v(sortableStruct{3})},
},
// UnsortableStructs.
{
// Note: not sorted - SpewKeys is false.
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
},
}
cs := spew.ConfigState{DisableMethods: false, SpewKeys: false}
helpTestSortValues(tests, &cs, t)
}
// TestSortValuesWithSpew ensures the sort functionality for relect.Value
// based sorting works as intended when using spew to stringify keys.
func TestSortValuesWithSpew(t *testing.T) {
v := reflect.ValueOf
a := v("a")
b := v("b")
c := v("c")
tests := []sortTestCase{
// Ints.
{
[]reflect.Value{v(2), v(1), v(3)},
[]reflect.Value{v(1), v(2), v(3)},
},
// Strings.
{
[]reflect.Value{b, a, c},
[]reflect.Value{a, b, c},
},
// SortableStructs.
{
[]reflect.Value{v(sortableStruct{2}), v(sortableStruct{1}), v(sortableStruct{3})},
[]reflect.Value{v(sortableStruct{1}), v(sortableStruct{2}), v(sortableStruct{3})},
},
// UnsortableStructs.
{
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
[]reflect.Value{v(unsortableStruct{1}), v(unsortableStruct{2}), v(unsortableStruct{3})},
},
}
cs := spew.ConfigState{DisableMethods: true, SpewKeys: true}
helpTestSortValues(tests, &cs, t)
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"bytes"
"fmt"
"io"
"os"
)
// ConfigState houses the configuration options used by spew to format and
// display values. There is a global instance, Config, that is used to control
// all top-level Formatter and Dump functionality. Each ConfigState instance
// provides methods equivalent to the top-level functions.
//
// The zero value for ConfigState provides no indentation. You would typically
// want to set it to a space or a tab.
//
// Alternatively, you can use NewDefaultConfig to get a ConfigState instance
// with default settings. See the documentation of NewDefaultConfig for default
// values.
type ConfigState struct {
// Indent specifies the string to use for each indentation level. The
// global config instance that all top-level functions use set this to a
// single space by default. If you would like more indentation, you might
// set this to a tab with "\t" or perhaps two spaces with " ".
Indent string
// MaxDepth controls the maximum number of levels to descend into nested
// data structures. The default, 0, means there is no limit.
//
// NOTE: Circular data structures are properly detected, so it is not
// necessary to set this value unless you specifically want to limit deeply
// nested data structures.
MaxDepth int
// DisableMethods specifies whether or not error and Stringer interfaces are
// invoked for types that implement them.
DisableMethods bool
// DisablePointerMethods specifies whether or not to check for and invoke
// error and Stringer interfaces on types which only accept a pointer
// receiver when the current type is not a pointer.
//
// NOTE: This might be an unsafe action since calling one of these methods
// with a pointer receiver could technically mutate the value, however,
// in practice, types which choose to satisify an error or Stringer
// interface with a pointer receiver should not be mutating their state
// inside these interface methods. As a result, this option relies on
// access to the unsafe package, so it will not have any effect when
// running in environments without access to the unsafe package such as
// Google App Engine or with the "safe" build tag specified.
DisablePointerMethods bool
// DisablePointerAddresses specifies whether to disable the printing of
// pointer addresses. This is useful when diffing data structures in tests.
DisablePointerAddresses bool
// DisableCapacities specifies whether to disable the printing of capacities
// for arrays, slices, maps and channels. This is useful when diffing
// data structures in tests.
DisableCapacities bool
// ContinueOnMethod specifies whether or not recursion should continue once
// a custom error or Stringer interface is invoked. The default, false,
// means it will print the results of invoking the custom error or Stringer
// interface and return immediately instead of continuing to recurse into
// the internals of the data type.
//
// NOTE: This flag does not have any effect if method invocation is disabled
// via the DisableMethods or DisablePointerMethods options.
ContinueOnMethod bool
// SortKeys specifies map keys should be sorted before being printed. Use
// this to have a more deterministic, diffable output. Note that only
// native types (bool, int, uint, floats, uintptr and string) and types
// that support the error or Stringer interfaces (if methods are
// enabled) are supported, with other types sorted according to the
// reflect.Value.String() output which guarantees display stability.
SortKeys bool
// SpewKeys specifies that, as a last resort attempt, map keys should
// be spewed to strings and sorted by those strings. This is only
// considered if SortKeys is true.
SpewKeys bool
}
// Config is the active configuration of the top-level functions.
// The configuration can be changed by modifying the contents of spew.Config.
var Config = ConfigState{Indent: " "}
// Errorf is a wrapper for fmt.Errorf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the formatted string as a value that satisfies error. See NewFormatter
// for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Errorf(format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Errorf(format string, a ...interface{}) (err error) {
return fmt.Errorf(format, c.convertArgs(a)...)
}
// Fprint is a wrapper for fmt.Fprint that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprint(w, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Fprint(w io.Writer, a ...interface{}) (n int, err error) {
return fmt.Fprint(w, c.convertArgs(a)...)
}
// Fprintf is a wrapper for fmt.Fprintf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprintf(w, format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
return fmt.Fprintf(w, format, c.convertArgs(a)...)
}
// Fprintln is a wrapper for fmt.Fprintln that treats each argument as if it
// passed with a Formatter interface returned by c.NewFormatter. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprintln(w, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
return fmt.Fprintln(w, c.convertArgs(a)...)
}
// Print is a wrapper for fmt.Print that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Print(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Print(a ...interface{}) (n int, err error) {
return fmt.Print(c.convertArgs(a)...)
}
// Printf is a wrapper for fmt.Printf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Printf(format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Printf(format string, a ...interface{}) (n int, err error) {
return fmt.Printf(format, c.convertArgs(a)...)
}
// Println is a wrapper for fmt.Println that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Println(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Println(a ...interface{}) (n int, err error) {
return fmt.Println(c.convertArgs(a)...)
}
// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprint(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprint(a ...interface{}) string {
return fmt.Sprint(c.convertArgs(a)...)
}
// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintf(format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprintf(format string, a ...interface{}) string {
return fmt.Sprintf(format, c.convertArgs(a)...)
}
// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
// were passed with a Formatter interface returned by c.NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintln(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprintln(a ...interface{}) string {
return fmt.Sprintln(c.convertArgs(a)...)
}
/*
NewFormatter returns a custom formatter that satisfies the fmt.Formatter
interface. As a result, it integrates cleanly with standard fmt package
printing functions. The formatter is useful for inline printing of smaller data
types similar to the standard %v format specifier.
The custom formatter only responds to the %v (most compact), %+v (adds pointer
addresses), %#v (adds types), and %#+v (adds types and pointer addresses) verb
combinations. Any other verbs such as %x and %q will be sent to the the
standard fmt package for formatting. In addition, the custom formatter ignores
the width and precision arguments (however they will still work on the format
specifiers not handled by the custom formatter).
Typically this function shouldn't be called directly. It is much easier to make
use of the custom formatter by calling one of the convenience functions such as
c.Printf, c.Println, or c.Printf.
*/
func (c *ConfigState) NewFormatter(v interface{}) fmt.Formatter {
return newFormatter(c, v)
}
// Fdump formats and displays the passed arguments to io.Writer w. It formats
// exactly the same as Dump.
func (c *ConfigState) Fdump(w io.Writer, a ...interface{}) {
fdump(c, w, a...)
}
/*
Dump displays the passed parameters to standard out with newlines, customizable
indentation, and additional debug information such as complete types and all
pointer addresses used to indirect to the final value. It provides the
following features over the built-in printing facilities provided by the fmt
package:
* Pointers are dereferenced and followed
* Circular data structures are detected and handled properly
* Custom Stringer/error interfaces are optionally invoked, including
on unexported types
* Custom types which only implement the Stringer/error interfaces via
a pointer receiver are optionally invoked when passing non-pointer
variables
* Byte arrays and slices are dumped like the hexdump -C command which
includes offsets, byte values in hex, and ASCII output
The configuration options are controlled by modifying the public members
of c. See ConfigState for options documentation.
See Fdump if you would prefer dumping to an arbitrary io.Writer or Sdump to
get the formatted result as a string.
*/
func (c *ConfigState) Dump(a ...interface{}) {
fdump(c, os.Stdout, a...)
}
// Sdump returns a string with the passed arguments formatted exactly the same
// as Dump.
func (c *ConfigState) Sdump(a ...interface{}) string {
var buf bytes.Buffer
fdump(c, &buf, a...)
return buf.String()
}
// convertArgs accepts a slice of arguments and returns a slice of the same
// length with each argument converted to a spew Formatter interface using
// the ConfigState associated with s.
func (c *ConfigState) convertArgs(args []interface{}) (formatters []interface{}) {
formatters = make([]interface{}, len(args))
for index, arg := range args {
formatters[index] = newFormatter(c, arg)
}
return formatters
}
// NewDefaultConfig returns a ConfigState with the following default settings.
//
// Indent: " "
// MaxDepth: 0
// DisableMethods: false
// DisablePointerMethods: false
// ContinueOnMethod: false
// SortKeys: false
func NewDefaultConfig() *ConfigState {
return &ConfigState{Indent: " "}
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
Package spew implements a deep pretty printer for Go data structures to aid in
debugging.
A quick overview of the additional features spew provides over the built-in
printing facilities for Go data types are as follows:
* Pointers are dereferenced and followed
* Circular data structures are detected and handled properly
* Custom Stringer/error interfaces are optionally invoked, including
on unexported types
* Custom types which only implement the Stringer/error interfaces via
a pointer receiver are optionally invoked when passing non-pointer
variables
* Byte arrays and slices are dumped like the hexdump -C command which
includes offsets, byte values in hex, and ASCII output (only when using
Dump style)
There are two different approaches spew allows for dumping Go data structures:
* Dump style which prints with newlines, customizable indentation,
and additional debug information such as types and all pointer addresses
used to indirect to the final value
* A custom Formatter interface that integrates cleanly with the standard fmt
package and replaces %v, %+v, %#v, and %#+v to provide inline printing
similar to the default %v while providing the additional functionality
outlined above and passing unsupported format verbs such as %x and %q
along to fmt
Quick Start
This section demonstrates how to quickly get started with spew. See the
sections below for further details on formatting and configuration options.
To dump a variable with full newlines, indentation, type, and pointer
information use Dump, Fdump, or Sdump:
spew.Dump(myVar1, myVar2, ...)
spew.Fdump(someWriter, myVar1, myVar2, ...)
str := spew.Sdump(myVar1, myVar2, ...)
Alternatively, if you would prefer to use format strings with a compacted inline
printing style, use the convenience wrappers Printf, Fprintf, etc with
%v (most compact), %+v (adds pointer addresses), %#v (adds types), or
%#+v (adds types and pointer addresses):
spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
spew.Fprintf(someWriter, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Fprintf(someWriter, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
Configuration Options
Configuration of spew is handled by fields in the ConfigState type. For
convenience, all of the top-level functions use a global state available
via the spew.Config global.
It is also possible to create a ConfigState instance that provides methods
equivalent to the top-level functions. This allows concurrent configuration
options. See the ConfigState documentation for more details.
The following configuration options are available:
* Indent
String to use for each indentation level for Dump functions.
It is a single space by default. A popular alternative is "\t".
* MaxDepth
Maximum number of levels to descend into nested data structures.
There is no limit by default.
* DisableMethods
Disables invocation of error and Stringer interface methods.
Method invocation is enabled by default.
* DisablePointerMethods
Disables invocation of error and Stringer interface methods on types
which only accept pointer receivers from non-pointer variables.
Pointer method invocation is enabled by default.
* DisablePointerAddresses
DisablePointerAddresses specifies whether to disable the printing of
pointer addresses. This is useful when diffing data structures in tests.
* DisableCapacities
DisableCapacities specifies whether to disable the printing of
capacities for arrays, slices, maps and channels. This is useful when
diffing data structures in tests.
* ContinueOnMethod
Enables recursion into types after invoking error and Stringer interface
methods. Recursion after method invocation is disabled by default.
* SortKeys
Specifies map keys should be sorted before being printed. Use
this to have a more deterministic, diffable output. Note that
only native types (bool, int, uint, floats, uintptr and string)
and types which implement error or Stringer interfaces are
supported with other types sorted according to the
reflect.Value.String() output which guarantees display
stability. Natural map order is used by default.
* SpewKeys
Specifies that, as a last resort attempt, map keys should be
spewed to strings and sorted by those strings. This is only
considered if SortKeys is true.
Dump Usage
Simply call spew.Dump with a list of variables you want to dump:
spew.Dump(myVar1, myVar2, ...)
You may also call spew.Fdump if you would prefer to output to an arbitrary
io.Writer. For example, to dump to standard error:
spew.Fdump(os.Stderr, myVar1, myVar2, ...)
A third option is to call spew.Sdump to get the formatted output as a string:
str := spew.Sdump(myVar1, myVar2, ...)
Sample Dump Output
See the Dump example for details on the setup of the types and variables being
shown here.
(main.Foo) {
unexportedField: (*main.Bar)(0xf84002e210)({
flag: (main.Flag) flagTwo,
data: (uintptr) <nil>
}),
ExportedField: (map[interface {}]interface {}) (len=1) {
(string) (len=3) "one": (bool) true
}
}
Byte (and uint8) arrays and slices are displayed uniquely like the hexdump -C
command as shown.
([]uint8) (len=32 cap=32) {
00000000 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 |............... |
00000010 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 |!"#$%&'()*+,-./0|
00000020 31 32 |12|
}
Custom Formatter
Spew provides a custom formatter that implements the fmt.Formatter interface
so that it integrates cleanly with standard fmt package printing functions. The
formatter is useful for inline printing of smaller data types similar to the
standard %v format specifier.
The custom formatter only responds to the %v (most compact), %+v (adds pointer
addresses), %#v (adds types), or %#+v (adds types and pointer addresses) verb
combinations. Any other verbs such as %x and %q will be sent to the the
standard fmt package for formatting. In addition, the custom formatter ignores
the width and precision arguments (however they will still work on the format
specifiers not handled by the custom formatter).
Custom Formatter Usage
The simplest way to make use of the spew custom formatter is to call one of the
convenience functions such as spew.Printf, spew.Println, or spew.Printf. The
functions have syntax you are most likely already familiar with:
spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
spew.Println(myVar, myVar2)
spew.Fprintf(os.Stderr, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Fprintf(os.Stderr, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
See the Index for the full list convenience functions.
Sample Formatter Output
Double pointer to a uint8:
%v: <**>5
%+v: <**>(0xf8400420d0->0xf8400420c8)5
%#v: (**uint8)5
%#+v: (**uint8)(0xf8400420d0->0xf8400420c8)5
Pointer to circular struct with a uint8 field and a pointer to itself:
%v: <*>{1 <*><shown>}
%+v: <*>(0xf84003e260){ui8:1 c:<*>(0xf84003e260)<shown>}
%#v: (*main.circular){ui8:(uint8)1 c:(*main.circular)<shown>}
%#+v: (*main.circular)(0xf84003e260){ui8:(uint8)1 c:(*main.circular)(0xf84003e260)<shown>}
See the Printf example for details on the setup of variables being shown
here.
Errors
Since it is possible for custom Stringer/error interfaces to panic, spew
detects them and handles them internally by printing the panic information
inline with the output. Since spew is intended to provide deep pretty printing
capabilities on structures, it intentionally does not return any errors.
*/
package spew

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"bytes"
"encoding/hex"
"fmt"
"io"
"os"
"reflect"
"regexp"
"strconv"
"strings"
)
var (
// uint8Type is a reflect.Type representing a uint8. It is used to
// convert cgo types to uint8 slices for hexdumping.
uint8Type = reflect.TypeOf(uint8(0))
// cCharRE is a regular expression that matches a cgo char.
// It is used to detect character arrays to hexdump them.
cCharRE = regexp.MustCompile(`^.*\._Ctype_char$`)
// cUnsignedCharRE is a regular expression that matches a cgo unsigned
// char. It is used to detect unsigned character arrays to hexdump
// them.
cUnsignedCharRE = regexp.MustCompile(`^.*\._Ctype_unsignedchar$`)
// cUint8tCharRE is a regular expression that matches a cgo uint8_t.
// It is used to detect uint8_t arrays to hexdump them.
cUint8tCharRE = regexp.MustCompile(`^.*\._Ctype_uint8_t$`)
)
// dumpState contains information about the state of a dump operation.
type dumpState struct {
w io.Writer
depth int
pointers map[uintptr]int
ignoreNextType bool
ignoreNextIndent bool
cs *ConfigState
}
// indent performs indentation according to the depth level and cs.Indent
// option.
func (d *dumpState) indent() {
if d.ignoreNextIndent {
d.ignoreNextIndent = false
return
}
d.w.Write(bytes.Repeat([]byte(d.cs.Indent), d.depth))
}
// unpackValue returns values inside of non-nil interfaces when possible.
// This is useful for data types like structs, arrays, slices, and maps which
// can contain varying types packed inside an interface.
func (d *dumpState) unpackValue(v reflect.Value) reflect.Value {
if v.Kind() == reflect.Interface && !v.IsNil() {
v = v.Elem()
}
return v
}
// dumpPtr handles formatting of pointers by indirecting them as necessary.
func (d *dumpState) dumpPtr(v reflect.Value) {
// Remove pointers at or below the current depth from map used to detect
// circular refs.
for k, depth := range d.pointers {
if depth >= d.depth {
delete(d.pointers, k)
}
}
// Keep list of all dereferenced pointers to show later.
pointerChain := make([]uintptr, 0)
// Figure out how many levels of indirection there are by dereferencing
// pointers and unpacking interfaces down the chain while detecting circular
// references.
nilFound := false
cycleFound := false
indirects := 0
ve := v
for ve.Kind() == reflect.Ptr {
if ve.IsNil() {
nilFound = true
break
}
indirects++
addr := ve.Pointer()
pointerChain = append(pointerChain, addr)
if pd, ok := d.pointers[addr]; ok && pd < d.depth {
cycleFound = true
indirects--
break
}
d.pointers[addr] = d.depth
ve = ve.Elem()
if ve.Kind() == reflect.Interface {
if ve.IsNil() {
nilFound = true
break
}
ve = ve.Elem()
}
}
// Display type information.
d.w.Write(openParenBytes)
d.w.Write(bytes.Repeat(asteriskBytes, indirects))
d.w.Write([]byte(ve.Type().String()))
d.w.Write(closeParenBytes)
// Display pointer information.
if !d.cs.DisablePointerAddresses && len(pointerChain) > 0 {
d.w.Write(openParenBytes)
for i, addr := range pointerChain {
if i > 0 {
d.w.Write(pointerChainBytes)
}
printHexPtr(d.w, addr)
}
d.w.Write(closeParenBytes)
}
// Display dereferenced value.
d.w.Write(openParenBytes)
switch {
case nilFound:
d.w.Write(nilAngleBytes)
case cycleFound:
d.w.Write(circularBytes)
default:
d.ignoreNextType = true
d.dump(ve)
}
d.w.Write(closeParenBytes)
}
// dumpSlice handles formatting of arrays and slices. Byte (uint8 under
// reflection) arrays and slices are dumped in hexdump -C fashion.
func (d *dumpState) dumpSlice(v reflect.Value) {
// Determine whether this type should be hex dumped or not. Also,
// for types which should be hexdumped, try to use the underlying data
// first, then fall back to trying to convert them to a uint8 slice.
var buf []uint8
doConvert := false
doHexDump := false
numEntries := v.Len()
if numEntries > 0 {
vt := v.Index(0).Type()
vts := vt.String()
switch {
// C types that need to be converted.
case cCharRE.MatchString(vts):
fallthrough
case cUnsignedCharRE.MatchString(vts):
fallthrough
case cUint8tCharRE.MatchString(vts):
doConvert = true
// Try to use existing uint8 slices and fall back to converting
// and copying if that fails.
case vt.Kind() == reflect.Uint8:
// We need an addressable interface to convert the type
// to a byte slice. However, the reflect package won't
// give us an interface on certain things like
// unexported struct fields in order to enforce
// visibility rules. We use unsafe, when available, to
// bypass these restrictions since this package does not
// mutate the values.
vs := v
if !vs.CanInterface() || !vs.CanAddr() {
vs = unsafeReflectValue(vs)
}
if !UnsafeDisabled {
vs = vs.Slice(0, numEntries)
// Use the existing uint8 slice if it can be
// type asserted.
iface := vs.Interface()
if slice, ok := iface.([]uint8); ok {
buf = slice
doHexDump = true
break
}
}
// The underlying data needs to be converted if it can't
// be type asserted to a uint8 slice.
doConvert = true
}
// Copy and convert the underlying type if needed.
if doConvert && vt.ConvertibleTo(uint8Type) {
// Convert and copy each element into a uint8 byte
// slice.
buf = make([]uint8, numEntries)
for i := 0; i < numEntries; i++ {
vv := v.Index(i)
buf[i] = uint8(vv.Convert(uint8Type).Uint())
}
doHexDump = true
}
}
// Hexdump the entire slice as needed.
if doHexDump {
indent := strings.Repeat(d.cs.Indent, d.depth)
str := indent + hex.Dump(buf)
str = strings.Replace(str, "\n", "\n"+indent, -1)
str = strings.TrimRight(str, d.cs.Indent)
d.w.Write([]byte(str))
return
}
// Recursively call dump for each item.
for i := 0; i < numEntries; i++ {
d.dump(d.unpackValue(v.Index(i)))
if i < (numEntries - 1) {
d.w.Write(commaNewlineBytes)
} else {
d.w.Write(newlineBytes)
}
}
}
// dump is the main workhorse for dumping a value. It uses the passed reflect
// value to figure out what kind of object we are dealing with and formats it
// appropriately. It is a recursive function, however circular data structures
// are detected and handled properly.
func (d *dumpState) dump(v reflect.Value) {
// Handle invalid reflect values immediately.
kind := v.Kind()
if kind == reflect.Invalid {
d.w.Write(invalidAngleBytes)
return
}
// Handle pointers specially.
if kind == reflect.Ptr {
d.indent()
d.dumpPtr(v)
return
}
// Print type information unless already handled elsewhere.
if !d.ignoreNextType {
d.indent()
d.w.Write(openParenBytes)
d.w.Write([]byte(v.Type().String()))
d.w.Write(closeParenBytes)
d.w.Write(spaceBytes)
}
d.ignoreNextType = false
// Display length and capacity if the built-in len and cap functions
// work with the value's kind and the len/cap itself is non-zero.
valueLen, valueCap := 0, 0
switch v.Kind() {
case reflect.Array, reflect.Slice, reflect.Chan:
valueLen, valueCap = v.Len(), v.Cap()
case reflect.Map, reflect.String:
valueLen = v.Len()
}
if valueLen != 0 || !d.cs.DisableCapacities && valueCap != 0 {
d.w.Write(openParenBytes)
if valueLen != 0 {
d.w.Write(lenEqualsBytes)
printInt(d.w, int64(valueLen), 10)
}
if !d.cs.DisableCapacities && valueCap != 0 {
if valueLen != 0 {
d.w.Write(spaceBytes)
}
d.w.Write(capEqualsBytes)
printInt(d.w, int64(valueCap), 10)
}
d.w.Write(closeParenBytes)
d.w.Write(spaceBytes)
}
// Call Stringer/error interfaces if they exist and the handle methods flag
// is enabled
if !d.cs.DisableMethods {
if (kind != reflect.Invalid) && (kind != reflect.Interface) {
if handled := handleMethods(d.cs, d.w, v); handled {
return
}
}
}
switch kind {
case reflect.Invalid:
// Do nothing. We should never get here since invalid has already
// been handled above.
case reflect.Bool:
printBool(d.w, v.Bool())
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
printInt(d.w, v.Int(), 10)
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
printUint(d.w, v.Uint(), 10)
case reflect.Float32:
printFloat(d.w, v.Float(), 32)
case reflect.Float64:
printFloat(d.w, v.Float(), 64)
case reflect.Complex64:
printComplex(d.w, v.Complex(), 32)
case reflect.Complex128:
printComplex(d.w, v.Complex(), 64)
case reflect.Slice:
if v.IsNil() {
d.w.Write(nilAngleBytes)
break
}
fallthrough
case reflect.Array:
d.w.Write(openBraceNewlineBytes)
d.depth++
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
d.indent()
d.w.Write(maxNewlineBytes)
} else {
d.dumpSlice(v)
}
d.depth--
d.indent()
d.w.Write(closeBraceBytes)
case reflect.String:
d.w.Write([]byte(strconv.Quote(v.String())))
case reflect.Interface:
// The only time we should get here is for nil interfaces due to
// unpackValue calls.
if v.IsNil() {
d.w.Write(nilAngleBytes)
}
case reflect.Ptr:
// Do nothing. We should never get here since pointers have already
// been handled above.
case reflect.Map:
// nil maps should be indicated as different than empty maps
if v.IsNil() {
d.w.Write(nilAngleBytes)
break
}
d.w.Write(openBraceNewlineBytes)
d.depth++
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
d.indent()
d.w.Write(maxNewlineBytes)
} else {
numEntries := v.Len()
keys := v.MapKeys()
if d.cs.SortKeys {
sortValues(keys, d.cs)
}
for i, key := range keys {
d.dump(d.unpackValue(key))
d.w.Write(colonSpaceBytes)
d.ignoreNextIndent = true
d.dump(d.unpackValue(v.MapIndex(key)))
if i < (numEntries - 1) {
d.w.Write(commaNewlineBytes)
} else {
d.w.Write(newlineBytes)
}
}
}
d.depth--
d.indent()
d.w.Write(closeBraceBytes)
case reflect.Struct:
d.w.Write(openBraceNewlineBytes)
d.depth++
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
d.indent()
d.w.Write(maxNewlineBytes)
} else {
vt := v.Type()
numFields := v.NumField()
for i := 0; i < numFields; i++ {
d.indent()
vtf := vt.Field(i)
d.w.Write([]byte(vtf.Name))
d.w.Write(colonSpaceBytes)
d.ignoreNextIndent = true
d.dump(d.unpackValue(v.Field(i)))
if i < (numFields - 1) {
d.w.Write(commaNewlineBytes)
} else {
d.w.Write(newlineBytes)
}
}
}
d.depth--
d.indent()
d.w.Write(closeBraceBytes)
case reflect.Uintptr:
printHexPtr(d.w, uintptr(v.Uint()))
case reflect.UnsafePointer, reflect.Chan, reflect.Func:
printHexPtr(d.w, v.Pointer())
// There were not any other types at the time this code was written, but
// fall back to letting the default fmt package handle it in case any new
// types are added.
default:
if v.CanInterface() {
fmt.Fprintf(d.w, "%v", v.Interface())
} else {
fmt.Fprintf(d.w, "%v", v.String())
}
}
}
// fdump is a helper function to consolidate the logic from the various public
// methods which take varying writers and config states.
func fdump(cs *ConfigState, w io.Writer, a ...interface{}) {
for _, arg := range a {
if arg == nil {
w.Write(interfaceBytes)
w.Write(spaceBytes)
w.Write(nilAngleBytes)
w.Write(newlineBytes)
continue
}
d := dumpState{w: w, cs: cs}
d.pointers = make(map[uintptr]int)
d.dump(reflect.ValueOf(arg))
d.w.Write(newlineBytes)
}
}
// Fdump formats and displays the passed arguments to io.Writer w. It formats
// exactly the same as Dump.
func Fdump(w io.Writer, a ...interface{}) {
fdump(&Config, w, a...)
}
// Sdump returns a string with the passed arguments formatted exactly the same
// as Dump.
func Sdump(a ...interface{}) string {
var buf bytes.Buffer
fdump(&Config, &buf, a...)
return buf.String()
}
/*
Dump displays the passed parameters to standard out with newlines, customizable
indentation, and additional debug information such as complete types and all
pointer addresses used to indirect to the final value. It provides the
following features over the built-in printing facilities provided by the fmt
package:
* Pointers are dereferenced and followed
* Circular data structures are detected and handled properly
* Custom Stringer/error interfaces are optionally invoked, including
on unexported types
* Custom types which only implement the Stringer/error interfaces via
a pointer receiver are optionally invoked when passing non-pointer
variables
* Byte arrays and slices are dumped like the hexdump -C command which
includes offsets, byte values in hex, and ASCII output
The configuration options are controlled by an exported package global,
spew.Config. See ConfigState for options documentation.
See Fdump if you would prefer dumping to an arbitrary io.Writer or Sdump to
get the formatted result as a string.
*/
func Dump(a ...interface{}) {
fdump(&Config, os.Stdout, a...)
}

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// Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when both cgo is supported and "-tags testcgo" is added to the go test
// command line. This means the cgo tests are only added (and hence run) when
// specifially requested. This configuration is used because spew itself
// does not require cgo to run even though it does handle certain cgo types
// specially. Rather than forcing all clients to require cgo and an external
// C compiler just to run the tests, this scheme makes them optional.
// +build cgo,testcgo
package spew_test
import (
"fmt"
"github.com/davecgh/go-spew/spew/testdata"
)
func addCgoDumpTests() {
// C char pointer.
v := testdata.GetCgoCharPointer()
nv := testdata.GetCgoNullCharPointer()
pv := &v
vcAddr := fmt.Sprintf("%p", v)
vAddr := fmt.Sprintf("%p", pv)
pvAddr := fmt.Sprintf("%p", &pv)
vt := "*testdata._Ctype_char"
vs := "116"
addDumpTest(v, "("+vt+")("+vcAddr+")("+vs+")\n")
addDumpTest(pv, "(*"+vt+")("+vAddr+"->"+vcAddr+")("+vs+")\n")
addDumpTest(&pv, "(**"+vt+")("+pvAddr+"->"+vAddr+"->"+vcAddr+")("+vs+")\n")
addDumpTest(nv, "("+vt+")(<nil>)\n")
// C char array.
v2, v2l, v2c := testdata.GetCgoCharArray()
v2Len := fmt.Sprintf("%d", v2l)
v2Cap := fmt.Sprintf("%d", v2c)
v2t := "[6]testdata._Ctype_char"
v2s := "(len=" + v2Len + " cap=" + v2Cap + ") " +
"{\n 00000000 74 65 73 74 32 00 " +
" |test2.|\n}"
addDumpTest(v2, "("+v2t+") "+v2s+"\n")
// C unsigned char array.
v3, v3l, v3c := testdata.GetCgoUnsignedCharArray()
v3Len := fmt.Sprintf("%d", v3l)
v3Cap := fmt.Sprintf("%d", v3c)
v3t := "[6]testdata._Ctype_unsignedchar"
v3t2 := "[6]testdata._Ctype_uchar"
v3s := "(len=" + v3Len + " cap=" + v3Cap + ") " +
"{\n 00000000 74 65 73 74 33 00 " +
" |test3.|\n}"
addDumpTest(v3, "("+v3t+") "+v3s+"\n", "("+v3t2+") "+v3s+"\n")
// C signed char array.
v4, v4l, v4c := testdata.GetCgoSignedCharArray()
v4Len := fmt.Sprintf("%d", v4l)
v4Cap := fmt.Sprintf("%d", v4c)
v4t := "[6]testdata._Ctype_schar"
v4t2 := "testdata._Ctype_schar"
v4s := "(len=" + v4Len + " cap=" + v4Cap + ") " +
"{\n (" + v4t2 + ") 116,\n (" + v4t2 + ") 101,\n (" + v4t2 +
") 115,\n (" + v4t2 + ") 116,\n (" + v4t2 + ") 52,\n (" + v4t2 +
") 0\n}"
addDumpTest(v4, "("+v4t+") "+v4s+"\n")
// C uint8_t array.
v5, v5l, v5c := testdata.GetCgoUint8tArray()
v5Len := fmt.Sprintf("%d", v5l)
v5Cap := fmt.Sprintf("%d", v5c)
v5t := "[6]testdata._Ctype_uint8_t"
v5s := "(len=" + v5Len + " cap=" + v5Cap + ") " +
"{\n 00000000 74 65 73 74 35 00 " +
" |test5.|\n}"
addDumpTest(v5, "("+v5t+") "+v5s+"\n")
// C typedefed unsigned char array.
v6, v6l, v6c := testdata.GetCgoTypdefedUnsignedCharArray()
v6Len := fmt.Sprintf("%d", v6l)
v6Cap := fmt.Sprintf("%d", v6c)
v6t := "[6]testdata._Ctype_custom_uchar_t"
v6s := "(len=" + v6Len + " cap=" + v6Cap + ") " +
"{\n 00000000 74 65 73 74 36 00 " +
" |test6.|\n}"
addDumpTest(v6, "("+v6t+") "+v6s+"\n")
}

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// Copyright (c) 2013 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when either cgo is not supported or "-tags testcgo" is not added to the go
// test command line. This file intentionally does not setup any cgo tests in
// this scenario.
// +build !cgo !testcgo
package spew_test
func addCgoDumpTests() {
// Don't add any tests for cgo since this file is only compiled when
// there should not be any cgo tests.
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew_test
import (
"fmt"
"github.com/davecgh/go-spew/spew"
)
type Flag int
const (
flagOne Flag = iota
flagTwo
)
var flagStrings = map[Flag]string{
flagOne: "flagOne",
flagTwo: "flagTwo",
}
func (f Flag) String() string {
if s, ok := flagStrings[f]; ok {
return s
}
return fmt.Sprintf("Unknown flag (%d)", int(f))
}
type Bar struct {
data uintptr
}
type Foo struct {
unexportedField Bar
ExportedField map[interface{}]interface{}
}
// This example demonstrates how to use Dump to dump variables to stdout.
func ExampleDump() {
// The following package level declarations are assumed for this example:
/*
type Flag int
const (
flagOne Flag = iota
flagTwo
)
var flagStrings = map[Flag]string{
flagOne: "flagOne",
flagTwo: "flagTwo",
}
func (f Flag) String() string {
if s, ok := flagStrings[f]; ok {
return s
}
return fmt.Sprintf("Unknown flag (%d)", int(f))
}
type Bar struct {
data uintptr
}
type Foo struct {
unexportedField Bar
ExportedField map[interface{}]interface{}
}
*/
// Setup some sample data structures for the example.
bar := Bar{uintptr(0)}
s1 := Foo{bar, map[interface{}]interface{}{"one": true}}
f := Flag(5)
b := []byte{
0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
0x31, 0x32,
}
// Dump!
spew.Dump(s1, f, b)
// Output:
// (spew_test.Foo) {
// unexportedField: (spew_test.Bar) {
// data: (uintptr) <nil>
// },
// ExportedField: (map[interface {}]interface {}) (len=1) {
// (string) (len=3) "one": (bool) true
// }
// }
// (spew_test.Flag) Unknown flag (5)
// ([]uint8) (len=34 cap=34) {
// 00000000 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 |............... |
// 00000010 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 |!"#$%&'()*+,-./0|
// 00000020 31 32 |12|
// }
//
}
// This example demonstrates how to use Printf to display a variable with a
// format string and inline formatting.
func ExamplePrintf() {
// Create a double pointer to a uint 8.
ui8 := uint8(5)
pui8 := &ui8
ppui8 := &pui8
// Create a circular data type.
type circular struct {
ui8 uint8
c *circular
}
c := circular{ui8: 1}
c.c = &c
// Print!
spew.Printf("ppui8: %v\n", ppui8)
spew.Printf("circular: %v\n", c)
// Output:
// ppui8: <**>5
// circular: {1 <*>{1 <*><shown>}}
}
// This example demonstrates how to use a ConfigState.
func ExampleConfigState() {
// Modify the indent level of the ConfigState only. The global
// configuration is not modified.
scs := spew.ConfigState{Indent: "\t"}
// Output using the ConfigState instance.
v := map[string]int{"one": 1}
scs.Printf("v: %v\n", v)
scs.Dump(v)
// Output:
// v: map[one:1]
// (map[string]int) (len=1) {
// (string) (len=3) "one": (int) 1
// }
}
// This example demonstrates how to use ConfigState.Dump to dump variables to
// stdout
func ExampleConfigState_Dump() {
// See the top-level Dump example for details on the types used in this
// example.
// Create two ConfigState instances with different indentation.
scs := spew.ConfigState{Indent: "\t"}
scs2 := spew.ConfigState{Indent: " "}
// Setup some sample data structures for the example.
bar := Bar{uintptr(0)}
s1 := Foo{bar, map[interface{}]interface{}{"one": true}}
// Dump using the ConfigState instances.
scs.Dump(s1)
scs2.Dump(s1)
// Output:
// (spew_test.Foo) {
// unexportedField: (spew_test.Bar) {
// data: (uintptr) <nil>
// },
// ExportedField: (map[interface {}]interface {}) (len=1) {
// (string) (len=3) "one": (bool) true
// }
// }
// (spew_test.Foo) {
// unexportedField: (spew_test.Bar) {
// data: (uintptr) <nil>
// },
// ExportedField: (map[interface {}]interface {}) (len=1) {
// (string) (len=3) "one": (bool) true
// }
// }
//
}
// This example demonstrates how to use ConfigState.Printf to display a variable
// with a format string and inline formatting.
func ExampleConfigState_Printf() {
// See the top-level Dump example for details on the types used in this
// example.
// Create two ConfigState instances and modify the method handling of the
// first ConfigState only.
scs := spew.NewDefaultConfig()
scs2 := spew.NewDefaultConfig()
scs.DisableMethods = true
// Alternatively
// scs := spew.ConfigState{Indent: " ", DisableMethods: true}
// scs2 := spew.ConfigState{Indent: " "}
// This is of type Flag which implements a Stringer and has raw value 1.
f := flagTwo
// Dump using the ConfigState instances.
scs.Printf("f: %v\n", f)
scs2.Printf("f: %v\n", f)
// Output:
// f: 1
// f: flagTwo
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"bytes"
"fmt"
"reflect"
"strconv"
"strings"
)
// supportedFlags is a list of all the character flags supported by fmt package.
const supportedFlags = "0-+# "
// formatState implements the fmt.Formatter interface and contains information
// about the state of a formatting operation. The NewFormatter function can
// be used to get a new Formatter which can be used directly as arguments
// in standard fmt package printing calls.
type formatState struct {
value interface{}
fs fmt.State
depth int
pointers map[uintptr]int
ignoreNextType bool
cs *ConfigState
}
// buildDefaultFormat recreates the original format string without precision
// and width information to pass in to fmt.Sprintf in the case of an
// unrecognized type. Unless new types are added to the language, this
// function won't ever be called.
func (f *formatState) buildDefaultFormat() (format string) {
buf := bytes.NewBuffer(percentBytes)
for _, flag := range supportedFlags {
if f.fs.Flag(int(flag)) {
buf.WriteRune(flag)
}
}
buf.WriteRune('v')
format = buf.String()
return format
}
// constructOrigFormat recreates the original format string including precision
// and width information to pass along to the standard fmt package. This allows
// automatic deferral of all format strings this package doesn't support.
func (f *formatState) constructOrigFormat(verb rune) (format string) {
buf := bytes.NewBuffer(percentBytes)
for _, flag := range supportedFlags {
if f.fs.Flag(int(flag)) {
buf.WriteRune(flag)
}
}
if width, ok := f.fs.Width(); ok {
buf.WriteString(strconv.Itoa(width))
}
if precision, ok := f.fs.Precision(); ok {
buf.Write(precisionBytes)
buf.WriteString(strconv.Itoa(precision))
}
buf.WriteRune(verb)
format = buf.String()
return format
}
// unpackValue returns values inside of non-nil interfaces when possible and
// ensures that types for values which have been unpacked from an interface
// are displayed when the show types flag is also set.
// This is useful for data types like structs, arrays, slices, and maps which
// can contain varying types packed inside an interface.
func (f *formatState) unpackValue(v reflect.Value) reflect.Value {
if v.Kind() == reflect.Interface {
f.ignoreNextType = false
if !v.IsNil() {
v = v.Elem()
}
}
return v
}
// formatPtr handles formatting of pointers by indirecting them as necessary.
func (f *formatState) formatPtr(v reflect.Value) {
// Display nil if top level pointer is nil.
showTypes := f.fs.Flag('#')
if v.IsNil() && (!showTypes || f.ignoreNextType) {
f.fs.Write(nilAngleBytes)
return
}
// Remove pointers at or below the current depth from map used to detect
// circular refs.
for k, depth := range f.pointers {
if depth >= f.depth {
delete(f.pointers, k)
}
}
// Keep list of all dereferenced pointers to possibly show later.
pointerChain := make([]uintptr, 0)
// Figure out how many levels of indirection there are by derferencing
// pointers and unpacking interfaces down the chain while detecting circular
// references.
nilFound := false
cycleFound := false
indirects := 0
ve := v
for ve.Kind() == reflect.Ptr {
if ve.IsNil() {
nilFound = true
break
}
indirects++
addr := ve.Pointer()
pointerChain = append(pointerChain, addr)
if pd, ok := f.pointers[addr]; ok && pd < f.depth {
cycleFound = true
indirects--
break
}
f.pointers[addr] = f.depth
ve = ve.Elem()
if ve.Kind() == reflect.Interface {
if ve.IsNil() {
nilFound = true
break
}
ve = ve.Elem()
}
}
// Display type or indirection level depending on flags.
if showTypes && !f.ignoreNextType {
f.fs.Write(openParenBytes)
f.fs.Write(bytes.Repeat(asteriskBytes, indirects))
f.fs.Write([]byte(ve.Type().String()))
f.fs.Write(closeParenBytes)
} else {
if nilFound || cycleFound {
indirects += strings.Count(ve.Type().String(), "*")
}
f.fs.Write(openAngleBytes)
f.fs.Write([]byte(strings.Repeat("*", indirects)))
f.fs.Write(closeAngleBytes)
}
// Display pointer information depending on flags.
if f.fs.Flag('+') && (len(pointerChain) > 0) {
f.fs.Write(openParenBytes)
for i, addr := range pointerChain {
if i > 0 {
f.fs.Write(pointerChainBytes)
}
printHexPtr(f.fs, addr)
}
f.fs.Write(closeParenBytes)
}
// Display dereferenced value.
switch {
case nilFound:
f.fs.Write(nilAngleBytes)
case cycleFound:
f.fs.Write(circularShortBytes)
default:
f.ignoreNextType = true
f.format(ve)
}
}
// format is the main workhorse for providing the Formatter interface. It
// uses the passed reflect value to figure out what kind of object we are
// dealing with and formats it appropriately. It is a recursive function,
// however circular data structures are detected and handled properly.
func (f *formatState) format(v reflect.Value) {
// Handle invalid reflect values immediately.
kind := v.Kind()
if kind == reflect.Invalid {
f.fs.Write(invalidAngleBytes)
return
}
// Handle pointers specially.
if kind == reflect.Ptr {
f.formatPtr(v)
return
}
// Print type information unless already handled elsewhere.
if !f.ignoreNextType && f.fs.Flag('#') {
f.fs.Write(openParenBytes)
f.fs.Write([]byte(v.Type().String()))
f.fs.Write(closeParenBytes)
}
f.ignoreNextType = false
// Call Stringer/error interfaces if they exist and the handle methods
// flag is enabled.
if !f.cs.DisableMethods {
if (kind != reflect.Invalid) && (kind != reflect.Interface) {
if handled := handleMethods(f.cs, f.fs, v); handled {
return
}
}
}
switch kind {
case reflect.Invalid:
// Do nothing. We should never get here since invalid has already
// been handled above.
case reflect.Bool:
printBool(f.fs, v.Bool())
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
printInt(f.fs, v.Int(), 10)
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
printUint(f.fs, v.Uint(), 10)
case reflect.Float32:
printFloat(f.fs, v.Float(), 32)
case reflect.Float64:
printFloat(f.fs, v.Float(), 64)
case reflect.Complex64:
printComplex(f.fs, v.Complex(), 32)
case reflect.Complex128:
printComplex(f.fs, v.Complex(), 64)
case reflect.Slice:
if v.IsNil() {
f.fs.Write(nilAngleBytes)
break
}
fallthrough
case reflect.Array:
f.fs.Write(openBracketBytes)
f.depth++
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
f.fs.Write(maxShortBytes)
} else {
numEntries := v.Len()
for i := 0; i < numEntries; i++ {
if i > 0 {
f.fs.Write(spaceBytes)
}
f.ignoreNextType = true
f.format(f.unpackValue(v.Index(i)))
}
}
f.depth--
f.fs.Write(closeBracketBytes)
case reflect.String:
f.fs.Write([]byte(v.String()))
case reflect.Interface:
// The only time we should get here is for nil interfaces due to
// unpackValue calls.
if v.IsNil() {
f.fs.Write(nilAngleBytes)
}
case reflect.Ptr:
// Do nothing. We should never get here since pointers have already
// been handled above.
case reflect.Map:
// nil maps should be indicated as different than empty maps
if v.IsNil() {
f.fs.Write(nilAngleBytes)
break
}
f.fs.Write(openMapBytes)
f.depth++
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
f.fs.Write(maxShortBytes)
} else {
keys := v.MapKeys()
if f.cs.SortKeys {
sortValues(keys, f.cs)
}
for i, key := range keys {
if i > 0 {
f.fs.Write(spaceBytes)
}
f.ignoreNextType = true
f.format(f.unpackValue(key))
f.fs.Write(colonBytes)
f.ignoreNextType = true
f.format(f.unpackValue(v.MapIndex(key)))
}
}
f.depth--
f.fs.Write(closeMapBytes)
case reflect.Struct:
numFields := v.NumField()
f.fs.Write(openBraceBytes)
f.depth++
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
f.fs.Write(maxShortBytes)
} else {
vt := v.Type()
for i := 0; i < numFields; i++ {
if i > 0 {
f.fs.Write(spaceBytes)
}
vtf := vt.Field(i)
if f.fs.Flag('+') || f.fs.Flag('#') {
f.fs.Write([]byte(vtf.Name))
f.fs.Write(colonBytes)
}
f.format(f.unpackValue(v.Field(i)))
}
}
f.depth--
f.fs.Write(closeBraceBytes)
case reflect.Uintptr:
printHexPtr(f.fs, uintptr(v.Uint()))
case reflect.UnsafePointer, reflect.Chan, reflect.Func:
printHexPtr(f.fs, v.Pointer())
// There were not any other types at the time this code was written, but
// fall back to letting the default fmt package handle it if any get added.
default:
format := f.buildDefaultFormat()
if v.CanInterface() {
fmt.Fprintf(f.fs, format, v.Interface())
} else {
fmt.Fprintf(f.fs, format, v.String())
}
}
}
// Format satisfies the fmt.Formatter interface. See NewFormatter for usage
// details.
func (f *formatState) Format(fs fmt.State, verb rune) {
f.fs = fs
// Use standard formatting for verbs that are not v.
if verb != 'v' {
format := f.constructOrigFormat(verb)
fmt.Fprintf(fs, format, f.value)
return
}
if f.value == nil {
if fs.Flag('#') {
fs.Write(interfaceBytes)
}
fs.Write(nilAngleBytes)
return
}
f.format(reflect.ValueOf(f.value))
}
// newFormatter is a helper function to consolidate the logic from the various
// public methods which take varying config states.
func newFormatter(cs *ConfigState, v interface{}) fmt.Formatter {
fs := &formatState{value: v, cs: cs}
fs.pointers = make(map[uintptr]int)
return fs
}
/*
NewFormatter returns a custom formatter that satisfies the fmt.Formatter
interface. As a result, it integrates cleanly with standard fmt package
printing functions. The formatter is useful for inline printing of smaller data
types similar to the standard %v format specifier.
The custom formatter only responds to the %v (most compact), %+v (adds pointer
addresses), %#v (adds types), or %#+v (adds types and pointer addresses) verb
combinations. Any other verbs such as %x and %q will be sent to the the
standard fmt package for formatting. In addition, the custom formatter ignores
the width and precision arguments (however they will still work on the format
specifiers not handled by the custom formatter).
Typically this function shouldn't be called directly. It is much easier to make
use of the custom formatter by calling one of the convenience functions such as
Printf, Println, or Fprintf.
*/
func NewFormatter(v interface{}) fmt.Formatter {
return newFormatter(&Config, v)
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
This test file is part of the spew package rather than than the spew_test
package because it needs access to internals to properly test certain cases
which are not possible via the public interface since they should never happen.
*/
package spew
import (
"bytes"
"reflect"
"testing"
)
// dummyFmtState implements a fake fmt.State to use for testing invalid
// reflect.Value handling. This is necessary because the fmt package catches
// invalid values before invoking the formatter on them.
type dummyFmtState struct {
bytes.Buffer
}
func (dfs *dummyFmtState) Flag(f int) bool {
return f == int('+')
}
func (dfs *dummyFmtState) Precision() (int, bool) {
return 0, false
}
func (dfs *dummyFmtState) Width() (int, bool) {
return 0, false
}
// TestInvalidReflectValue ensures the dump and formatter code handles an
// invalid reflect value properly. This needs access to internal state since it
// should never happen in real code and therefore can't be tested via the public
// API.
func TestInvalidReflectValue(t *testing.T) {
i := 1
// Dump invalid reflect value.
v := new(reflect.Value)
buf := new(bytes.Buffer)
d := dumpState{w: buf, cs: &Config}
d.dump(*v)
s := buf.String()
want := "<invalid>"
if s != want {
t.Errorf("InvalidReflectValue #%d\n got: %s want: %s", i, s, want)
}
i++
// Formatter invalid reflect value.
buf2 := new(dummyFmtState)
f := formatState{value: *v, cs: &Config, fs: buf2}
f.format(*v)
s = buf2.String()
want = "<invalid>"
if s != want {
t.Errorf("InvalidReflectValue #%d got: %s want: %s", i, s, want)
}
}
// SortValues makes the internal sortValues function available to the test
// package.
func SortValues(values []reflect.Value, cs *ConfigState) {
sortValues(values, cs)
}

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// Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when the code is not running on Google App Engine, compiled by GopherJS, and
// "-tags safe" is not added to the go build command line. The "disableunsafe"
// tag is deprecated and thus should not be used.
// +build !js,!appengine,!safe,!disableunsafe
/*
This test file is part of the spew package rather than than the spew_test
package because it needs access to internals to properly test certain cases
which are not possible via the public interface since they should never happen.
*/
package spew
import (
"bytes"
"reflect"
"testing"
"unsafe"
)
// changeKind uses unsafe to intentionally change the kind of a reflect.Value to
// the maximum kind value which does not exist. This is needed to test the
// fallback code which punts to the standard fmt library for new types that
// might get added to the language.
func changeKind(v *reflect.Value, readOnly bool) {
rvf := (*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(v)) + offsetFlag))
*rvf = *rvf | ((1<<flagKindWidth - 1) << flagKindShift)
if readOnly {
*rvf |= flagRO
} else {
*rvf &= ^uintptr(flagRO)
}
}
// TestAddedReflectValue tests functionaly of the dump and formatter code which
// falls back to the standard fmt library for new types that might get added to
// the language.
func TestAddedReflectValue(t *testing.T) {
i := 1
// Dump using a reflect.Value that is exported.
v := reflect.ValueOf(int8(5))
changeKind(&v, false)
buf := new(bytes.Buffer)
d := dumpState{w: buf, cs: &Config}
d.dump(v)
s := buf.String()
want := "(int8) 5"
if s != want {
t.Errorf("TestAddedReflectValue #%d\n got: %s want: %s", i, s, want)
}
i++
// Dump using a reflect.Value that is not exported.
changeKind(&v, true)
buf.Reset()
d.dump(v)
s = buf.String()
want = "(int8) <int8 Value>"
if s != want {
t.Errorf("TestAddedReflectValue #%d\n got: %s want: %s", i, s, want)
}
i++
// Formatter using a reflect.Value that is exported.
changeKind(&v, false)
buf2 := new(dummyFmtState)
f := formatState{value: v, cs: &Config, fs: buf2}
f.format(v)
s = buf2.String()
want = "5"
if s != want {
t.Errorf("TestAddedReflectValue #%d got: %s want: %s", i, s, want)
}
i++
// Formatter using a reflect.Value that is not exported.
changeKind(&v, true)
buf2.Reset()
f = formatState{value: v, cs: &Config, fs: buf2}
f.format(v)
s = buf2.String()
want = "<int8 Value>"
if s != want {
t.Errorf("TestAddedReflectValue #%d got: %s want: %s", i, s, want)
}
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"fmt"
"io"
)
// Errorf is a wrapper for fmt.Errorf that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the formatted string as a value that satisfies error. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Errorf(format, spew.NewFormatter(a), spew.NewFormatter(b))
func Errorf(format string, a ...interface{}) (err error) {
return fmt.Errorf(format, convertArgs(a)...)
}
// Fprint is a wrapper for fmt.Fprint that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprint(w, spew.NewFormatter(a), spew.NewFormatter(b))
func Fprint(w io.Writer, a ...interface{}) (n int, err error) {
return fmt.Fprint(w, convertArgs(a)...)
}
// Fprintf is a wrapper for fmt.Fprintf that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprintf(w, format, spew.NewFormatter(a), spew.NewFormatter(b))
func Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
return fmt.Fprintf(w, format, convertArgs(a)...)
}
// Fprintln is a wrapper for fmt.Fprintln that treats each argument as if it
// passed with a default Formatter interface returned by NewFormatter. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprintln(w, spew.NewFormatter(a), spew.NewFormatter(b))
func Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
return fmt.Fprintln(w, convertArgs(a)...)
}
// Print is a wrapper for fmt.Print that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Print(spew.NewFormatter(a), spew.NewFormatter(b))
func Print(a ...interface{}) (n int, err error) {
return fmt.Print(convertArgs(a)...)
}
// Printf is a wrapper for fmt.Printf that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Printf(format, spew.NewFormatter(a), spew.NewFormatter(b))
func Printf(format string, a ...interface{}) (n int, err error) {
return fmt.Printf(format, convertArgs(a)...)
}
// Println is a wrapper for fmt.Println that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Println(spew.NewFormatter(a), spew.NewFormatter(b))
func Println(a ...interface{}) (n int, err error) {
return fmt.Println(convertArgs(a)...)
}
// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprint(spew.NewFormatter(a), spew.NewFormatter(b))
func Sprint(a ...interface{}) string {
return fmt.Sprint(convertArgs(a)...)
}
// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintf(format, spew.NewFormatter(a), spew.NewFormatter(b))
func Sprintf(format string, a ...interface{}) string {
return fmt.Sprintf(format, convertArgs(a)...)
}
// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
// were passed with a default Formatter interface returned by NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintln(spew.NewFormatter(a), spew.NewFormatter(b))
func Sprintln(a ...interface{}) string {
return fmt.Sprintln(convertArgs(a)...)
}
// convertArgs accepts a slice of arguments and returns a slice of the same
// length with each argument converted to a default spew Formatter interface.
func convertArgs(args []interface{}) (formatters []interface{}) {
formatters = make([]interface{}, len(args))
for index, arg := range args {
formatters[index] = NewFormatter(arg)
}
return formatters
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew_test
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"testing"
"github.com/davecgh/go-spew/spew"
)
// spewFunc is used to identify which public function of the spew package or
// ConfigState a test applies to.
type spewFunc int
const (
fCSFdump spewFunc = iota
fCSFprint
fCSFprintf
fCSFprintln
fCSPrint
fCSPrintln
fCSSdump
fCSSprint
fCSSprintf
fCSSprintln
fCSErrorf
fCSNewFormatter
fErrorf
fFprint
fFprintln
fPrint
fPrintln
fSdump
fSprint
fSprintf
fSprintln
)
// Map of spewFunc values to names for pretty printing.
var spewFuncStrings = map[spewFunc]string{
fCSFdump: "ConfigState.Fdump",
fCSFprint: "ConfigState.Fprint",
fCSFprintf: "ConfigState.Fprintf",
fCSFprintln: "ConfigState.Fprintln",
fCSSdump: "ConfigState.Sdump",
fCSPrint: "ConfigState.Print",
fCSPrintln: "ConfigState.Println",
fCSSprint: "ConfigState.Sprint",
fCSSprintf: "ConfigState.Sprintf",
fCSSprintln: "ConfigState.Sprintln",
fCSErrorf: "ConfigState.Errorf",
fCSNewFormatter: "ConfigState.NewFormatter",
fErrorf: "spew.Errorf",
fFprint: "spew.Fprint",
fFprintln: "spew.Fprintln",
fPrint: "spew.Print",
fPrintln: "spew.Println",
fSdump: "spew.Sdump",
fSprint: "spew.Sprint",
fSprintf: "spew.Sprintf",
fSprintln: "spew.Sprintln",
}
func (f spewFunc) String() string {
if s, ok := spewFuncStrings[f]; ok {
return s
}
return fmt.Sprintf("Unknown spewFunc (%d)", int(f))
}
// spewTest is used to describe a test to be performed against the public
// functions of the spew package or ConfigState.
type spewTest struct {
cs *spew.ConfigState
f spewFunc
format string
in interface{}
want string
}
// spewTests houses the tests to be performed against the public functions of
// the spew package and ConfigState.
//
// These tests are only intended to ensure the public functions are exercised
// and are intentionally not exhaustive of types. The exhaustive type
// tests are handled in the dump and format tests.
var spewTests []spewTest
// redirStdout is a helper function to return the standard output from f as a
// byte slice.
func redirStdout(f func()) ([]byte, error) {
tempFile, err := ioutil.TempFile("", "ss-test")
if err != nil {
return nil, err
}
fileName := tempFile.Name()
defer os.Remove(fileName) // Ignore error
origStdout := os.Stdout
os.Stdout = tempFile
f()
os.Stdout = origStdout
tempFile.Close()
return ioutil.ReadFile(fileName)
}
func initSpewTests() {
// Config states with various settings.
scsDefault := spew.NewDefaultConfig()
scsNoMethods := &spew.ConfigState{Indent: " ", DisableMethods: true}
scsNoPmethods := &spew.ConfigState{Indent: " ", DisablePointerMethods: true}
scsMaxDepth := &spew.ConfigState{Indent: " ", MaxDepth: 1}
scsContinue := &spew.ConfigState{Indent: " ", ContinueOnMethod: true}
scsNoPtrAddr := &spew.ConfigState{DisablePointerAddresses: true}
scsNoCap := &spew.ConfigState{DisableCapacities: true}
// Variables for tests on types which implement Stringer interface with and
// without a pointer receiver.
ts := stringer("test")
tps := pstringer("test")
type ptrTester struct {
s *struct{}
}
tptr := &ptrTester{s: &struct{}{}}
// depthTester is used to test max depth handling for structs, array, slices
// and maps.
type depthTester struct {
ic indirCir1
arr [1]string
slice []string
m map[string]int
}
dt := depthTester{indirCir1{nil}, [1]string{"arr"}, []string{"slice"},
map[string]int{"one": 1}}
// Variable for tests on types which implement error interface.
te := customError(10)
spewTests = []spewTest{
{scsDefault, fCSFdump, "", int8(127), "(int8) 127\n"},
{scsDefault, fCSFprint, "", int16(32767), "32767"},
{scsDefault, fCSFprintf, "%v", int32(2147483647), "2147483647"},
{scsDefault, fCSFprintln, "", int(2147483647), "2147483647\n"},
{scsDefault, fCSPrint, "", int64(9223372036854775807), "9223372036854775807"},
{scsDefault, fCSPrintln, "", uint8(255), "255\n"},
{scsDefault, fCSSdump, "", uint8(64), "(uint8) 64\n"},
{scsDefault, fCSSprint, "", complex(1, 2), "(1+2i)"},
{scsDefault, fCSSprintf, "%v", complex(float32(3), 4), "(3+4i)"},
{scsDefault, fCSSprintln, "", complex(float64(5), 6), "(5+6i)\n"},
{scsDefault, fCSErrorf, "%#v", uint16(65535), "(uint16)65535"},
{scsDefault, fCSNewFormatter, "%v", uint32(4294967295), "4294967295"},
{scsDefault, fErrorf, "%v", uint64(18446744073709551615), "18446744073709551615"},
{scsDefault, fFprint, "", float32(3.14), "3.14"},
{scsDefault, fFprintln, "", float64(6.28), "6.28\n"},
{scsDefault, fPrint, "", true, "true"},
{scsDefault, fPrintln, "", false, "false\n"},
{scsDefault, fSdump, "", complex(-10, -20), "(complex128) (-10-20i)\n"},
{scsDefault, fSprint, "", complex(-1, -2), "(-1-2i)"},
{scsDefault, fSprintf, "%v", complex(float32(-3), -4), "(-3-4i)"},
{scsDefault, fSprintln, "", complex(float64(-5), -6), "(-5-6i)\n"},
{scsNoMethods, fCSFprint, "", ts, "test"},
{scsNoMethods, fCSFprint, "", &ts, "<*>test"},
{scsNoMethods, fCSFprint, "", tps, "test"},
{scsNoMethods, fCSFprint, "", &tps, "<*>test"},
{scsNoPmethods, fCSFprint, "", ts, "stringer test"},
{scsNoPmethods, fCSFprint, "", &ts, "<*>stringer test"},
{scsNoPmethods, fCSFprint, "", tps, "test"},
{scsNoPmethods, fCSFprint, "", &tps, "<*>stringer test"},
{scsMaxDepth, fCSFprint, "", dt, "{{<max>} [<max>] [<max>] map[<max>]}"},
{scsMaxDepth, fCSFdump, "", dt, "(spew_test.depthTester) {\n" +
" ic: (spew_test.indirCir1) {\n <max depth reached>\n },\n" +
" arr: ([1]string) (len=1 cap=1) {\n <max depth reached>\n },\n" +
" slice: ([]string) (len=1 cap=1) {\n <max depth reached>\n },\n" +
" m: (map[string]int) (len=1) {\n <max depth reached>\n }\n}\n"},
{scsContinue, fCSFprint, "", ts, "(stringer test) test"},
{scsContinue, fCSFdump, "", ts, "(spew_test.stringer) " +
"(len=4) (stringer test) \"test\"\n"},
{scsContinue, fCSFprint, "", te, "(error: 10) 10"},
{scsContinue, fCSFdump, "", te, "(spew_test.customError) " +
"(error: 10) 10\n"},
{scsNoPtrAddr, fCSFprint, "", tptr, "<*>{<*>{}}"},
{scsNoPtrAddr, fCSSdump, "", tptr, "(*spew_test.ptrTester)({\ns: (*struct {})({\n})\n})\n"},
{scsNoCap, fCSSdump, "", make([]string, 0, 10), "([]string) {\n}\n"},
{scsNoCap, fCSSdump, "", make([]string, 1, 10), "([]string) (len=1) {\n(string) \"\"\n}\n"},
}
}
// TestSpew executes all of the tests described by spewTests.
func TestSpew(t *testing.T) {
initSpewTests()
t.Logf("Running %d tests", len(spewTests))
for i, test := range spewTests {
buf := new(bytes.Buffer)
switch test.f {
case fCSFdump:
test.cs.Fdump(buf, test.in)
case fCSFprint:
test.cs.Fprint(buf, test.in)
case fCSFprintf:
test.cs.Fprintf(buf, test.format, test.in)
case fCSFprintln:
test.cs.Fprintln(buf, test.in)
case fCSPrint:
b, err := redirStdout(func() { test.cs.Print(test.in) })
if err != nil {
t.Errorf("%v #%d %v", test.f, i, err)
continue
}
buf.Write(b)
case fCSPrintln:
b, err := redirStdout(func() { test.cs.Println(test.in) })
if err != nil {
t.Errorf("%v #%d %v", test.f, i, err)
continue
}
buf.Write(b)
case fCSSdump:
str := test.cs.Sdump(test.in)
buf.WriteString(str)
case fCSSprint:
str := test.cs.Sprint(test.in)
buf.WriteString(str)
case fCSSprintf:
str := test.cs.Sprintf(test.format, test.in)
buf.WriteString(str)
case fCSSprintln:
str := test.cs.Sprintln(test.in)
buf.WriteString(str)
case fCSErrorf:
err := test.cs.Errorf(test.format, test.in)
buf.WriteString(err.Error())
case fCSNewFormatter:
fmt.Fprintf(buf, test.format, test.cs.NewFormatter(test.in))
case fErrorf:
err := spew.Errorf(test.format, test.in)
buf.WriteString(err.Error())
case fFprint:
spew.Fprint(buf, test.in)
case fFprintln:
spew.Fprintln(buf, test.in)
case fPrint:
b, err := redirStdout(func() { spew.Print(test.in) })
if err != nil {
t.Errorf("%v #%d %v", test.f, i, err)
continue
}
buf.Write(b)
case fPrintln:
b, err := redirStdout(func() { spew.Println(test.in) })
if err != nil {
t.Errorf("%v #%d %v", test.f, i, err)
continue
}
buf.Write(b)
case fSdump:
str := spew.Sdump(test.in)
buf.WriteString(str)
case fSprint:
str := spew.Sprint(test.in)
buf.WriteString(str)
case fSprintf:
str := spew.Sprintf(test.format, test.in)
buf.WriteString(str)
case fSprintln:
str := spew.Sprintln(test.in)
buf.WriteString(str)
default:
t.Errorf("%v #%d unrecognized function", test.f, i)
continue
}
s := buf.String()
if test.want != s {
t.Errorf("ConfigState #%d\n got: %s want: %s", i, s, test.want)
continue
}
}
}

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// Copyright (c) 2013 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when both cgo is supported and "-tags testcgo" is added to the go test
// command line. This code should really only be in the dumpcgo_test.go file,
// but unfortunately Go will not allow cgo in test files, so this is a
// workaround to allow cgo types to be tested. This configuration is used
// because spew itself does not require cgo to run even though it does handle
// certain cgo types specially. Rather than forcing all clients to require cgo
// and an external C compiler just to run the tests, this scheme makes them
// optional.
// +build cgo,testcgo
package testdata
/*
#include <stdint.h>
typedef unsigned char custom_uchar_t;
char *ncp = 0;
char *cp = "test";
char ca[6] = {'t', 'e', 's', 't', '2', '\0'};
unsigned char uca[6] = {'t', 'e', 's', 't', '3', '\0'};
signed char sca[6] = {'t', 'e', 's', 't', '4', '\0'};
uint8_t ui8ta[6] = {'t', 'e', 's', 't', '5', '\0'};
custom_uchar_t tuca[6] = {'t', 'e', 's', 't', '6', '\0'};
*/
import "C"
// GetCgoNullCharPointer returns a null char pointer via cgo. This is only
// used for tests.
func GetCgoNullCharPointer() interface{} {
return C.ncp
}
// GetCgoCharPointer returns a char pointer via cgo. This is only used for
// tests.
func GetCgoCharPointer() interface{} {
return C.cp
}
// GetCgoCharArray returns a char array via cgo and the array's len and cap.
// This is only used for tests.
func GetCgoCharArray() (interface{}, int, int) {
return C.ca, len(C.ca), cap(C.ca)
}
// GetCgoUnsignedCharArray returns an unsigned char array via cgo and the
// array's len and cap. This is only used for tests.
func GetCgoUnsignedCharArray() (interface{}, int, int) {
return C.uca, len(C.uca), cap(C.uca)
}
// GetCgoSignedCharArray returns a signed char array via cgo and the array's len
// and cap. This is only used for tests.
func GetCgoSignedCharArray() (interface{}, int, int) {
return C.sca, len(C.sca), cap(C.sca)
}
// GetCgoUint8tArray returns a uint8_t array via cgo and the array's len and
// cap. This is only used for tests.
func GetCgoUint8tArray() (interface{}, int, int) {
return C.ui8ta, len(C.ui8ta), cap(C.ui8ta)
}
// GetCgoTypdefedUnsignedCharArray returns a typedefed unsigned char array via
// cgo and the array's len and cap. This is only used for tests.
func GetCgoTypdefedUnsignedCharArray() (interface{}, int, int) {
return C.tuca, len(C.tuca), cap(C.tuca)
}

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// Package difflib is a partial port of Python difflib module.
//
// It provides tools to compare sequences of strings and generate textual diffs.
//
// The following class and functions have been ported:
//
// - SequenceMatcher
//
// - unified_diff
//
// - context_diff
//
// Getting unified diffs was the main goal of the port. Keep in mind this code
// is mostly suitable to output text differences in a human friendly way, there
// are no guarantees generated diffs are consumable by patch(1).
package difflib
import (
"bufio"
"bytes"
"fmt"
"io"
"strings"
)
func min(a, b int) int {
if a < b {
return a
}
return b
}
func max(a, b int) int {
if a > b {
return a
}
return b
}
func calculateRatio(matches, length int) float64 {
if length > 0 {
return 2.0 * float64(matches) / float64(length)
}
return 1.0
}
type Match struct {
A int
B int
Size int
}
type OpCode struct {
Tag byte
I1 int
I2 int
J1 int
J2 int
}
// SequenceMatcher compares sequence of strings. The basic
// algorithm predates, and is a little fancier than, an algorithm
// published in the late 1980's by Ratcliff and Obershelp under the
// hyperbolic name "gestalt pattern matching". The basic idea is to find
// the longest contiguous matching subsequence that contains no "junk"
// elements (R-O doesn't address junk). The same idea is then applied
// recursively to the pieces of the sequences to the left and to the right
// of the matching subsequence. This does not yield minimal edit
// sequences, but does tend to yield matches that "look right" to people.
//
// SequenceMatcher tries to compute a "human-friendly diff" between two
// sequences. Unlike e.g. UNIX(tm) diff, the fundamental notion is the
// longest *contiguous* & junk-free matching subsequence. That's what
// catches peoples' eyes. The Windows(tm) windiff has another interesting
// notion, pairing up elements that appear uniquely in each sequence.
// That, and the method here, appear to yield more intuitive difference
// reports than does diff. This method appears to be the least vulnerable
// to synching up on blocks of "junk lines", though (like blank lines in
// ordinary text files, or maybe "<P>" lines in HTML files). That may be
// because this is the only method of the 3 that has a *concept* of
// "junk" <wink>.
//
// Timing: Basic R-O is cubic time worst case and quadratic time expected
// case. SequenceMatcher is quadratic time for the worst case and has
// expected-case behavior dependent in a complicated way on how many
// elements the sequences have in common; best case time is linear.
type SequenceMatcher struct {
a []string
b []string
b2j map[string][]int
IsJunk func(string) bool
autoJunk bool
bJunk map[string]struct{}
matchingBlocks []Match
fullBCount map[string]int
bPopular map[string]struct{}
opCodes []OpCode
}
func NewMatcher(a, b []string) *SequenceMatcher {
m := SequenceMatcher{autoJunk: true}
m.SetSeqs(a, b)
return &m
}
func NewMatcherWithJunk(a, b []string, autoJunk bool,
isJunk func(string) bool) *SequenceMatcher {
m := SequenceMatcher{IsJunk: isJunk, autoJunk: autoJunk}
m.SetSeqs(a, b)
return &m
}
// Set two sequences to be compared.
func (m *SequenceMatcher) SetSeqs(a, b []string) {
m.SetSeq1(a)
m.SetSeq2(b)
}
// Set the first sequence to be compared. The second sequence to be compared is
// not changed.
//
// SequenceMatcher computes and caches detailed information about the second
// sequence, so if you want to compare one sequence S against many sequences,
// use .SetSeq2(s) once and call .SetSeq1(x) repeatedly for each of the other
// sequences.
//
// See also SetSeqs() and SetSeq2().
func (m *SequenceMatcher) SetSeq1(a []string) {
if &a == &m.a {
return
}
m.a = a
m.matchingBlocks = nil
m.opCodes = nil
}
// Set the second sequence to be compared. The first sequence to be compared is
// not changed.
func (m *SequenceMatcher) SetSeq2(b []string) {
if &b == &m.b {
return
}
m.b = b
m.matchingBlocks = nil
m.opCodes = nil
m.fullBCount = nil
m.chainB()
}
func (m *SequenceMatcher) chainB() {
// Populate line -> index mapping
b2j := map[string][]int{}
for i, s := range m.b {
indices := b2j[s]
indices = append(indices, i)
b2j[s] = indices
}
// Purge junk elements
m.bJunk = map[string]struct{}{}
if m.IsJunk != nil {
junk := m.bJunk
for s, _ := range b2j {
if m.IsJunk(s) {
junk[s] = struct{}{}
}
}
for s, _ := range junk {
delete(b2j, s)
}
}
// Purge remaining popular elements
popular := map[string]struct{}{}
n := len(m.b)
if m.autoJunk && n >= 200 {
ntest := n/100 + 1
for s, indices := range b2j {
if len(indices) > ntest {
popular[s] = struct{}{}
}
}
for s, _ := range popular {
delete(b2j, s)
}
}
m.bPopular = popular
m.b2j = b2j
}
func (m *SequenceMatcher) isBJunk(s string) bool {
_, ok := m.bJunk[s]
return ok
}
// Find longest matching block in a[alo:ahi] and b[blo:bhi].
//
// If IsJunk is not defined:
//
// Return (i,j,k) such that a[i:i+k] is equal to b[j:j+k], where
// alo <= i <= i+k <= ahi
// blo <= j <= j+k <= bhi
// and for all (i',j',k') meeting those conditions,
// k >= k'
// i <= i'
// and if i == i', j <= j'
//
// In other words, of all maximal matching blocks, return one that
// starts earliest in a, and of all those maximal matching blocks that
// start earliest in a, return the one that starts earliest in b.
//
// If IsJunk is defined, first the longest matching block is
// determined as above, but with the additional restriction that no
// junk element appears in the block. Then that block is extended as
// far as possible by matching (only) junk elements on both sides. So
// the resulting block never matches on junk except as identical junk
// happens to be adjacent to an "interesting" match.
//
// If no blocks match, return (alo, blo, 0).
func (m *SequenceMatcher) findLongestMatch(alo, ahi, blo, bhi int) Match {
// CAUTION: stripping common prefix or suffix would be incorrect.
// E.g.,
// ab
// acab
// Longest matching block is "ab", but if common prefix is
// stripped, it's "a" (tied with "b"). UNIX(tm) diff does so
// strip, so ends up claiming that ab is changed to acab by
// inserting "ca" in the middle. That's minimal but unintuitive:
// "it's obvious" that someone inserted "ac" at the front.
// Windiff ends up at the same place as diff, but by pairing up
// the unique 'b's and then matching the first two 'a's.
besti, bestj, bestsize := alo, blo, 0
// find longest junk-free match
// during an iteration of the loop, j2len[j] = length of longest
// junk-free match ending with a[i-1] and b[j]
j2len := map[int]int{}
for i := alo; i != ahi; i++ {
// look at all instances of a[i] in b; note that because
// b2j has no junk keys, the loop is skipped if a[i] is junk
newj2len := map[int]int{}
for _, j := range m.b2j[m.a[i]] {
// a[i] matches b[j]
if j < blo {
continue
}
if j >= bhi {
break
}
k := j2len[j-1] + 1
newj2len[j] = k
if k > bestsize {
besti, bestj, bestsize = i-k+1, j-k+1, k
}
}
j2len = newj2len
}
// Extend the best by non-junk elements on each end. In particular,
// "popular" non-junk elements aren't in b2j, which greatly speeds
// the inner loop above, but also means "the best" match so far
// doesn't contain any junk *or* popular non-junk elements.
for besti > alo && bestj > blo && !m.isBJunk(m.b[bestj-1]) &&
m.a[besti-1] == m.b[bestj-1] {
besti, bestj, bestsize = besti-1, bestj-1, bestsize+1
}
for besti+bestsize < ahi && bestj+bestsize < bhi &&
!m.isBJunk(m.b[bestj+bestsize]) &&
m.a[besti+bestsize] == m.b[bestj+bestsize] {
bestsize += 1
}
// Now that we have a wholly interesting match (albeit possibly
// empty!), we may as well suck up the matching junk on each
// side of it too. Can't think of a good reason not to, and it
// saves post-processing the (possibly considerable) expense of
// figuring out what to do with it. In the case of an empty
// interesting match, this is clearly the right thing to do,
// because no other kind of match is possible in the regions.
for besti > alo && bestj > blo && m.isBJunk(m.b[bestj-1]) &&
m.a[besti-1] == m.b[bestj-1] {
besti, bestj, bestsize = besti-1, bestj-1, bestsize+1
}
for besti+bestsize < ahi && bestj+bestsize < bhi &&
m.isBJunk(m.b[bestj+bestsize]) &&
m.a[besti+bestsize] == m.b[bestj+bestsize] {
bestsize += 1
}
return Match{A: besti, B: bestj, Size: bestsize}
}
// Return list of triples describing matching subsequences.
//
// Each triple is of the form (i, j, n), and means that
// a[i:i+n] == b[j:j+n]. The triples are monotonically increasing in
// i and in j. It's also guaranteed that if (i, j, n) and (i', j', n') are
// adjacent triples in the list, and the second is not the last triple in the
// list, then i+n != i' or j+n != j'. IOW, adjacent triples never describe
// adjacent equal blocks.
//
// The last triple is a dummy, (len(a), len(b), 0), and is the only
// triple with n==0.
func (m *SequenceMatcher) GetMatchingBlocks() []Match {
if m.matchingBlocks != nil {
return m.matchingBlocks
}
var matchBlocks func(alo, ahi, blo, bhi int, matched []Match) []Match
matchBlocks = func(alo, ahi, blo, bhi int, matched []Match) []Match {
match := m.findLongestMatch(alo, ahi, blo, bhi)
i, j, k := match.A, match.B, match.Size
if match.Size > 0 {
if alo < i && blo < j {
matched = matchBlocks(alo, i, blo, j, matched)
}
matched = append(matched, match)
if i+k < ahi && j+k < bhi {
matched = matchBlocks(i+k, ahi, j+k, bhi, matched)
}
}
return matched
}
matched := matchBlocks(0, len(m.a), 0, len(m.b), nil)
// It's possible that we have adjacent equal blocks in the
// matching_blocks list now.
nonAdjacent := []Match{}
i1, j1, k1 := 0, 0, 0
for _, b := range matched {
// Is this block adjacent to i1, j1, k1?
i2, j2, k2 := b.A, b.B, b.Size
if i1+k1 == i2 && j1+k1 == j2 {
// Yes, so collapse them -- this just increases the length of
// the first block by the length of the second, and the first
// block so lengthened remains the block to compare against.
k1 += k2
} else {
// Not adjacent. Remember the first block (k1==0 means it's
// the dummy we started with), and make the second block the
// new block to compare against.
if k1 > 0 {
nonAdjacent = append(nonAdjacent, Match{i1, j1, k1})
}
i1, j1, k1 = i2, j2, k2
}
}
if k1 > 0 {
nonAdjacent = append(nonAdjacent, Match{i1, j1, k1})
}
nonAdjacent = append(nonAdjacent, Match{len(m.a), len(m.b), 0})
m.matchingBlocks = nonAdjacent
return m.matchingBlocks
}
// Return list of 5-tuples describing how to turn a into b.
//
// Each tuple is of the form (tag, i1, i2, j1, j2). The first tuple
// has i1 == j1 == 0, and remaining tuples have i1 == the i2 from the
// tuple preceding it, and likewise for j1 == the previous j2.
//
// The tags are characters, with these meanings:
//
// 'r' (replace): a[i1:i2] should be replaced by b[j1:j2]
//
// 'd' (delete): a[i1:i2] should be deleted, j1==j2 in this case.
//
// 'i' (insert): b[j1:j2] should be inserted at a[i1:i1], i1==i2 in this case.
//
// 'e' (equal): a[i1:i2] == b[j1:j2]
func (m *SequenceMatcher) GetOpCodes() []OpCode {
if m.opCodes != nil {
return m.opCodes
}
i, j := 0, 0
matching := m.GetMatchingBlocks()
opCodes := make([]OpCode, 0, len(matching))
for _, m := range matching {
// invariant: we've pumped out correct diffs to change
// a[:i] into b[:j], and the next matching block is
// a[ai:ai+size] == b[bj:bj+size]. So we need to pump
// out a diff to change a[i:ai] into b[j:bj], pump out
// the matching block, and move (i,j) beyond the match
ai, bj, size := m.A, m.B, m.Size
tag := byte(0)
if i < ai && j < bj {
tag = 'r'
} else if i < ai {
tag = 'd'
} else if j < bj {
tag = 'i'
}
if tag > 0 {
opCodes = append(opCodes, OpCode{tag, i, ai, j, bj})
}
i, j = ai+size, bj+size
// the list of matching blocks is terminated by a
// sentinel with size 0
if size > 0 {
opCodes = append(opCodes, OpCode{'e', ai, i, bj, j})
}
}
m.opCodes = opCodes
return m.opCodes
}
// Isolate change clusters by eliminating ranges with no changes.
//
// Return a generator of groups with up to n lines of context.
// Each group is in the same format as returned by GetOpCodes().
func (m *SequenceMatcher) GetGroupedOpCodes(n int) [][]OpCode {
if n < 0 {
n = 3
}
codes := m.GetOpCodes()
if len(codes) == 0 {
codes = []OpCode{OpCode{'e', 0, 1, 0, 1}}
}
// Fixup leading and trailing groups if they show no changes.
if codes[0].Tag == 'e' {
c := codes[0]
i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
codes[0] = OpCode{c.Tag, max(i1, i2-n), i2, max(j1, j2-n), j2}
}
if codes[len(codes)-1].Tag == 'e' {
c := codes[len(codes)-1]
i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
codes[len(codes)-1] = OpCode{c.Tag, i1, min(i2, i1+n), j1, min(j2, j1+n)}
}
nn := n + n
groups := [][]OpCode{}
group := []OpCode{}
for _, c := range codes {
i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
// End the current group and start a new one whenever
// there is a large range with no changes.
if c.Tag == 'e' && i2-i1 > nn {
group = append(group, OpCode{c.Tag, i1, min(i2, i1+n),
j1, min(j2, j1+n)})
groups = append(groups, group)
group = []OpCode{}
i1, j1 = max(i1, i2-n), max(j1, j2-n)
}
group = append(group, OpCode{c.Tag, i1, i2, j1, j2})
}
if len(group) > 0 && !(len(group) == 1 && group[0].Tag == 'e') {
groups = append(groups, group)
}
return groups
}
// Return a measure of the sequences' similarity (float in [0,1]).
//
// Where T is the total number of elements in both sequences, and
// M is the number of matches, this is 2.0*M / T.
// Note that this is 1 if the sequences are identical, and 0 if
// they have nothing in common.
//
// .Ratio() is expensive to compute if you haven't already computed
// .GetMatchingBlocks() or .GetOpCodes(), in which case you may
// want to try .QuickRatio() or .RealQuickRation() first to get an
// upper bound.
func (m *SequenceMatcher) Ratio() float64 {
matches := 0
for _, m := range m.GetMatchingBlocks() {
matches += m.Size
}
return calculateRatio(matches, len(m.a)+len(m.b))
}
// Return an upper bound on ratio() relatively quickly.
//
// This isn't defined beyond that it is an upper bound on .Ratio(), and
// is faster to compute.
func (m *SequenceMatcher) QuickRatio() float64 {
// viewing a and b as multisets, set matches to the cardinality
// of their intersection; this counts the number of matches
// without regard to order, so is clearly an upper bound
if m.fullBCount == nil {
m.fullBCount = map[string]int{}
for _, s := range m.b {
m.fullBCount[s] = m.fullBCount[s] + 1
}
}
// avail[x] is the number of times x appears in 'b' less the
// number of times we've seen it in 'a' so far ... kinda
avail := map[string]int{}
matches := 0
for _, s := range m.a {
n, ok := avail[s]
if !ok {
n = m.fullBCount[s]
}
avail[s] = n - 1
if n > 0 {
matches += 1
}
}
return calculateRatio(matches, len(m.a)+len(m.b))
}
// Return an upper bound on ratio() very quickly.
//
// This isn't defined beyond that it is an upper bound on .Ratio(), and
// is faster to compute than either .Ratio() or .QuickRatio().
func (m *SequenceMatcher) RealQuickRatio() float64 {
la, lb := len(m.a), len(m.b)
return calculateRatio(min(la, lb), la+lb)
}
// Convert range to the "ed" format
func formatRangeUnified(start, stop int) string {
// Per the diff spec at http://www.unix.org/single_unix_specification/
beginning := start + 1 // lines start numbering with one
length := stop - start
if length == 1 {
return fmt.Sprintf("%d", beginning)
}
if length == 0 {
beginning -= 1 // empty ranges begin at line just before the range
}
return fmt.Sprintf("%d,%d", beginning, length)
}
// Unified diff parameters
type UnifiedDiff struct {
A []string // First sequence lines
FromFile string // First file name
FromDate string // First file time
B []string // Second sequence lines
ToFile string // Second file name
ToDate string // Second file time
Eol string // Headers end of line, defaults to LF
Context int // Number of context lines
}
// Compare two sequences of lines; generate the delta as a unified diff.
//
// Unified diffs are a compact way of showing line changes and a few
// lines of context. The number of context lines is set by 'n' which
// defaults to three.
//
// By default, the diff control lines (those with ---, +++, or @@) are
// created with a trailing newline. This is helpful so that inputs
// created from file.readlines() result in diffs that are suitable for
// file.writelines() since both the inputs and outputs have trailing
// newlines.
//
// For inputs that do not have trailing newlines, set the lineterm
// argument to "" so that the output will be uniformly newline free.
//
// The unidiff format normally has a header for filenames and modification
// times. Any or all of these may be specified using strings for
// 'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
// The modification times are normally expressed in the ISO 8601 format.
func WriteUnifiedDiff(writer io.Writer, diff UnifiedDiff) error {
buf := bufio.NewWriter(writer)
defer buf.Flush()
wf := func(format string, args ...interface{}) error {
_, err := buf.WriteString(fmt.Sprintf(format, args...))
return err
}
ws := func(s string) error {
_, err := buf.WriteString(s)
return err
}
if len(diff.Eol) == 0 {
diff.Eol = "\n"
}
started := false
m := NewMatcher(diff.A, diff.B)
for _, g := range m.GetGroupedOpCodes(diff.Context) {
if !started {
started = true
fromDate := ""
if len(diff.FromDate) > 0 {
fromDate = "\t" + diff.FromDate
}
toDate := ""
if len(diff.ToDate) > 0 {
toDate = "\t" + diff.ToDate
}
if diff.FromFile != "" || diff.ToFile != "" {
err := wf("--- %s%s%s", diff.FromFile, fromDate, diff.Eol)
if err != nil {
return err
}
err = wf("+++ %s%s%s", diff.ToFile, toDate, diff.Eol)
if err != nil {
return err
}
}
}
first, last := g[0], g[len(g)-1]
range1 := formatRangeUnified(first.I1, last.I2)
range2 := formatRangeUnified(first.J1, last.J2)
if err := wf("@@ -%s +%s @@%s", range1, range2, diff.Eol); err != nil {
return err
}
for _, c := range g {
i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
if c.Tag == 'e' {
for _, line := range diff.A[i1:i2] {
if err := ws(" " + line); err != nil {
return err
}
}
continue
}
if c.Tag == 'r' || c.Tag == 'd' {
for _, line := range diff.A[i1:i2] {
if err := ws("-" + line); err != nil {
return err
}
}
}
if c.Tag == 'r' || c.Tag == 'i' {
for _, line := range diff.B[j1:j2] {
if err := ws("+" + line); err != nil {
return err
}
}
}
}
}
return nil
}
// Like WriteUnifiedDiff but returns the diff a string.
func GetUnifiedDiffString(diff UnifiedDiff) (string, error) {
w := &bytes.Buffer{}
err := WriteUnifiedDiff(w, diff)
return string(w.Bytes()), err
}
// Convert range to the "ed" format.
func formatRangeContext(start, stop int) string {
// Per the diff spec at http://www.unix.org/single_unix_specification/
beginning := start + 1 // lines start numbering with one
length := stop - start
if length == 0 {
beginning -= 1 // empty ranges begin at line just before the range
}
if length <= 1 {
return fmt.Sprintf("%d", beginning)
}
return fmt.Sprintf("%d,%d", beginning, beginning+length-1)
}
type ContextDiff UnifiedDiff
// Compare two sequences of lines; generate the delta as a context diff.
//
// Context diffs are a compact way of showing line changes and a few
// lines of context. The number of context lines is set by diff.Context
// which defaults to three.
//
// By default, the diff control lines (those with *** or ---) are
// created with a trailing newline.
//
// For inputs that do not have trailing newlines, set the diff.Eol
// argument to "" so that the output will be uniformly newline free.
//
// The context diff format normally has a header for filenames and
// modification times. Any or all of these may be specified using
// strings for diff.FromFile, diff.ToFile, diff.FromDate, diff.ToDate.
// The modification times are normally expressed in the ISO 8601 format.
// If not specified, the strings default to blanks.
func WriteContextDiff(writer io.Writer, diff ContextDiff) error {
buf := bufio.NewWriter(writer)
defer buf.Flush()
var diffErr error
wf := func(format string, args ...interface{}) {
_, err := buf.WriteString(fmt.Sprintf(format, args...))
if diffErr == nil && err != nil {
diffErr = err
}
}
ws := func(s string) {
_, err := buf.WriteString(s)
if diffErr == nil && err != nil {
diffErr = err
}
}
if len(diff.Eol) == 0 {
diff.Eol = "\n"
}
prefix := map[byte]string{
'i': "+ ",
'd': "- ",
'r': "! ",
'e': " ",
}
started := false
m := NewMatcher(diff.A, diff.B)
for _, g := range m.GetGroupedOpCodes(diff.Context) {
if !started {
started = true
fromDate := ""
if len(diff.FromDate) > 0 {
fromDate = "\t" + diff.FromDate
}
toDate := ""
if len(diff.ToDate) > 0 {
toDate = "\t" + diff.ToDate
}
if diff.FromFile != "" || diff.ToFile != "" {
wf("*** %s%s%s", diff.FromFile, fromDate, diff.Eol)
wf("--- %s%s%s", diff.ToFile, toDate, diff.Eol)
}
}
first, last := g[0], g[len(g)-1]
ws("***************" + diff.Eol)
range1 := formatRangeContext(first.I1, last.I2)
wf("*** %s ****%s", range1, diff.Eol)
for _, c := range g {
if c.Tag == 'r' || c.Tag == 'd' {
for _, cc := range g {
if cc.Tag == 'i' {
continue
}
for _, line := range diff.A[cc.I1:cc.I2] {
ws(prefix[cc.Tag] + line)
}
}
break
}
}
range2 := formatRangeContext(first.J1, last.J2)
wf("--- %s ----%s", range2, diff.Eol)
for _, c := range g {
if c.Tag == 'r' || c.Tag == 'i' {
for _, cc := range g {
if cc.Tag == 'd' {
continue
}
for _, line := range diff.B[cc.J1:cc.J2] {
ws(prefix[cc.Tag] + line)
}
}
break
}
}
}
return diffErr
}
// Like WriteContextDiff but returns the diff a string.
func GetContextDiffString(diff ContextDiff) (string, error) {
w := &bytes.Buffer{}
err := WriteContextDiff(w, diff)
return string(w.Bytes()), err
}
// Split a string on "\n" while preserving them. The output can be used
// as input for UnifiedDiff and ContextDiff structures.
func SplitLines(s string) []string {
lines := strings.SplitAfter(s, "\n")
lines[len(lines)-1] += "\n"
return lines
}

426
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@ -0,0 +1,426 @@
package difflib
import (
"bytes"
"fmt"
"math"
"reflect"
"strings"
"testing"
)
func assertAlmostEqual(t *testing.T, a, b float64, places int) {
if math.Abs(a-b) > math.Pow10(-places) {
t.Errorf("%.7f != %.7f", a, b)
}
}
func assertEqual(t *testing.T, a, b interface{}) {
if !reflect.DeepEqual(a, b) {
t.Errorf("%v != %v", a, b)
}
}
func splitChars(s string) []string {
chars := make([]string, 0, len(s))
// Assume ASCII inputs
for i := 0; i != len(s); i++ {
chars = append(chars, string(s[i]))
}
return chars
}
func TestSequenceMatcherRatio(t *testing.T) {
s := NewMatcher(splitChars("abcd"), splitChars("bcde"))
assertEqual(t, s.Ratio(), 0.75)
assertEqual(t, s.QuickRatio(), 0.75)
assertEqual(t, s.RealQuickRatio(), 1.0)
}
func TestGetOptCodes(t *testing.T) {
a := "qabxcd"
b := "abycdf"
s := NewMatcher(splitChars(a), splitChars(b))
w := &bytes.Buffer{}
for _, op := range s.GetOpCodes() {
fmt.Fprintf(w, "%s a[%d:%d], (%s) b[%d:%d] (%s)\n", string(op.Tag),
op.I1, op.I2, a[op.I1:op.I2], op.J1, op.J2, b[op.J1:op.J2])
}
result := string(w.Bytes())
expected := `d a[0:1], (q) b[0:0] ()
e a[1:3], (ab) b[0:2] (ab)
r a[3:4], (x) b[2:3] (y)
e a[4:6], (cd) b[3:5] (cd)
i a[6:6], () b[5:6] (f)
`
if expected != result {
t.Errorf("unexpected op codes: \n%s", result)
}
}
func TestGroupedOpCodes(t *testing.T) {
a := []string{}
for i := 0; i != 39; i++ {
a = append(a, fmt.Sprintf("%02d", i))
}
b := []string{}
b = append(b, a[:8]...)
b = append(b, " i")
b = append(b, a[8:19]...)
b = append(b, " x")
b = append(b, a[20:22]...)
b = append(b, a[27:34]...)
b = append(b, " y")
b = append(b, a[35:]...)
s := NewMatcher(a, b)
w := &bytes.Buffer{}
for _, g := range s.GetGroupedOpCodes(-1) {
fmt.Fprintf(w, "group\n")
for _, op := range g {
fmt.Fprintf(w, " %s, %d, %d, %d, %d\n", string(op.Tag),
op.I1, op.I2, op.J1, op.J2)
}
}
result := string(w.Bytes())
expected := `group
e, 5, 8, 5, 8
i, 8, 8, 8, 9
e, 8, 11, 9, 12
group
e, 16, 19, 17, 20
r, 19, 20, 20, 21
e, 20, 22, 21, 23
d, 22, 27, 23, 23
e, 27, 30, 23, 26
group
e, 31, 34, 27, 30
r, 34, 35, 30, 31
e, 35, 38, 31, 34
`
if expected != result {
t.Errorf("unexpected op codes: \n%s", result)
}
}
func ExampleGetUnifiedDiffCode() {
a := `one
two
three
four
fmt.Printf("%s,%T",a,b)`
b := `zero
one
three
four`
diff := UnifiedDiff{
A: SplitLines(a),
B: SplitLines(b),
FromFile: "Original",
FromDate: "2005-01-26 23:30:50",
ToFile: "Current",
ToDate: "2010-04-02 10:20:52",
Context: 3,
}
result, _ := GetUnifiedDiffString(diff)
fmt.Println(strings.Replace(result, "\t", " ", -1))
// Output:
// --- Original 2005-01-26 23:30:50
// +++ Current 2010-04-02 10:20:52
// @@ -1,5 +1,4 @@
// +zero
// one
// -two
// three
// four
// -fmt.Printf("%s,%T",a,b)
}
func ExampleGetContextDiffCode() {
a := `one
two
three
four
fmt.Printf("%s,%T",a,b)`
b := `zero
one
tree
four`
diff := ContextDiff{
A: SplitLines(a),
B: SplitLines(b),
FromFile: "Original",
ToFile: "Current",
Context: 3,
Eol: "\n",
}
result, _ := GetContextDiffString(diff)
fmt.Print(strings.Replace(result, "\t", " ", -1))
// Output:
// *** Original
// --- Current
// ***************
// *** 1,5 ****
// one
// ! two
// ! three
// four
// - fmt.Printf("%s,%T",a,b)
// --- 1,4 ----
// + zero
// one
// ! tree
// four
}
func ExampleGetContextDiffString() {
a := `one
two
three
four`
b := `zero
one
tree
four`
diff := ContextDiff{
A: SplitLines(a),
B: SplitLines(b),
FromFile: "Original",
ToFile: "Current",
Context: 3,
Eol: "\n",
}
result, _ := GetContextDiffString(diff)
fmt.Printf(strings.Replace(result, "\t", " ", -1))
// Output:
// *** Original
// --- Current
// ***************
// *** 1,4 ****
// one
// ! two
// ! three
// four
// --- 1,4 ----
// + zero
// one
// ! tree
// four
}
func rep(s string, count int) string {
return strings.Repeat(s, count)
}
func TestWithAsciiOneInsert(t *testing.T) {
sm := NewMatcher(splitChars(rep("b", 100)),
splitChars("a"+rep("b", 100)))
assertAlmostEqual(t, sm.Ratio(), 0.995, 3)
assertEqual(t, sm.GetOpCodes(),
[]OpCode{{'i', 0, 0, 0, 1}, {'e', 0, 100, 1, 101}})
assertEqual(t, len(sm.bPopular), 0)
sm = NewMatcher(splitChars(rep("b", 100)),
splitChars(rep("b", 50)+"a"+rep("b", 50)))
assertAlmostEqual(t, sm.Ratio(), 0.995, 3)
assertEqual(t, sm.GetOpCodes(),
[]OpCode{{'e', 0, 50, 0, 50}, {'i', 50, 50, 50, 51}, {'e', 50, 100, 51, 101}})
assertEqual(t, len(sm.bPopular), 0)
}
func TestWithAsciiOnDelete(t *testing.T) {
sm := NewMatcher(splitChars(rep("a", 40)+"c"+rep("b", 40)),
splitChars(rep("a", 40)+rep("b", 40)))
assertAlmostEqual(t, sm.Ratio(), 0.994, 3)
assertEqual(t, sm.GetOpCodes(),
[]OpCode{{'e', 0, 40, 0, 40}, {'d', 40, 41, 40, 40}, {'e', 41, 81, 40, 80}})
}
func TestWithAsciiBJunk(t *testing.T) {
isJunk := func(s string) bool {
return s == " "
}
sm := NewMatcherWithJunk(splitChars(rep("a", 40)+rep("b", 40)),
splitChars(rep("a", 44)+rep("b", 40)), true, isJunk)
assertEqual(t, sm.bJunk, map[string]struct{}{})
sm = NewMatcherWithJunk(splitChars(rep("a", 40)+rep("b", 40)),
splitChars(rep("a", 44)+rep("b", 40)+rep(" ", 20)), false, isJunk)
assertEqual(t, sm.bJunk, map[string]struct{}{" ": struct{}{}})
isJunk = func(s string) bool {
return s == " " || s == "b"
}
sm = NewMatcherWithJunk(splitChars(rep("a", 40)+rep("b", 40)),
splitChars(rep("a", 44)+rep("b", 40)+rep(" ", 20)), false, isJunk)
assertEqual(t, sm.bJunk, map[string]struct{}{" ": struct{}{}, "b": struct{}{}})
}
func TestSFBugsRatioForNullSeqn(t *testing.T) {
sm := NewMatcher(nil, nil)
assertEqual(t, sm.Ratio(), 1.0)
assertEqual(t, sm.QuickRatio(), 1.0)
assertEqual(t, sm.RealQuickRatio(), 1.0)
}
func TestSFBugsComparingEmptyLists(t *testing.T) {
groups := NewMatcher(nil, nil).GetGroupedOpCodes(-1)
assertEqual(t, len(groups), 0)
diff := UnifiedDiff{
FromFile: "Original",
ToFile: "Current",
Context: 3,
}
result, err := GetUnifiedDiffString(diff)
assertEqual(t, err, nil)
assertEqual(t, result, "")
}
func TestOutputFormatRangeFormatUnified(t *testing.T) {
// Per the diff spec at http://www.unix.org/single_unix_specification/
//
// Each <range> field shall be of the form:
// %1d", <beginning line number> if the range contains exactly one line,
// and:
// "%1d,%1d", <beginning line number>, <number of lines> otherwise.
// If a range is empty, its beginning line number shall be the number of
// the line just before the range, or 0 if the empty range starts the file.
fm := formatRangeUnified
assertEqual(t, fm(3, 3), "3,0")
assertEqual(t, fm(3, 4), "4")
assertEqual(t, fm(3, 5), "4,2")
assertEqual(t, fm(3, 6), "4,3")
assertEqual(t, fm(0, 0), "0,0")
}
func TestOutputFormatRangeFormatContext(t *testing.T) {
// Per the diff spec at http://www.unix.org/single_unix_specification/
//
// The range of lines in file1 shall be written in the following format
// if the range contains two or more lines:
// "*** %d,%d ****\n", <beginning line number>, <ending line number>
// and the following format otherwise:
// "*** %d ****\n", <ending line number>
// The ending line number of an empty range shall be the number of the preceding line,
// or 0 if the range is at the start of the file.
//
// Next, the range of lines in file2 shall be written in the following format
// if the range contains two or more lines:
// "--- %d,%d ----\n", <beginning line number>, <ending line number>
// and the following format otherwise:
// "--- %d ----\n", <ending line number>
fm := formatRangeContext
assertEqual(t, fm(3, 3), "3")
assertEqual(t, fm(3, 4), "4")
assertEqual(t, fm(3, 5), "4,5")
assertEqual(t, fm(3, 6), "4,6")
assertEqual(t, fm(0, 0), "0")
}
func TestOutputFormatTabDelimiter(t *testing.T) {
diff := UnifiedDiff{
A: splitChars("one"),
B: splitChars("two"),
FromFile: "Original",
FromDate: "2005-01-26 23:30:50",
ToFile: "Current",
ToDate: "2010-04-12 10:20:52",
Eol: "\n",
}
ud, err := GetUnifiedDiffString(diff)
assertEqual(t, err, nil)
assertEqual(t, SplitLines(ud)[:2], []string{
"--- Original\t2005-01-26 23:30:50\n",
"+++ Current\t2010-04-12 10:20:52\n",
})
cd, err := GetContextDiffString(ContextDiff(diff))
assertEqual(t, err, nil)
assertEqual(t, SplitLines(cd)[:2], []string{
"*** Original\t2005-01-26 23:30:50\n",
"--- Current\t2010-04-12 10:20:52\n",
})
}
func TestOutputFormatNoTrailingTabOnEmptyFiledate(t *testing.T) {
diff := UnifiedDiff{
A: splitChars("one"),
B: splitChars("two"),
FromFile: "Original",
ToFile: "Current",
Eol: "\n",
}
ud, err := GetUnifiedDiffString(diff)
assertEqual(t, err, nil)
assertEqual(t, SplitLines(ud)[:2], []string{"--- Original\n", "+++ Current\n"})
cd, err := GetContextDiffString(ContextDiff(diff))
assertEqual(t, err, nil)
assertEqual(t, SplitLines(cd)[:2], []string{"*** Original\n", "--- Current\n"})
}
func TestOmitFilenames(t *testing.T) {
diff := UnifiedDiff{
A: SplitLines("o\nn\ne\n"),
B: SplitLines("t\nw\no\n"),
Eol: "\n",
}
ud, err := GetUnifiedDiffString(diff)
assertEqual(t, err, nil)
assertEqual(t, SplitLines(ud), []string{
"@@ -0,0 +1,2 @@\n",
"+t\n",
"+w\n",
"@@ -2,2 +3,0 @@\n",
"-n\n",
"-e\n",
"\n",
})
cd, err := GetContextDiffString(ContextDiff(diff))
assertEqual(t, err, nil)
assertEqual(t, SplitLines(cd), []string{
"***************\n",
"*** 0 ****\n",
"--- 1,2 ----\n",
"+ t\n",
"+ w\n",
"***************\n",
"*** 2,3 ****\n",
"- n\n",
"- e\n",
"--- 3 ----\n",
"\n",
})
}
func TestSplitLines(t *testing.T) {
allTests := []struct {
input string
want []string
}{
{"foo", []string{"foo\n"}},
{"foo\nbar", []string{"foo\n", "bar\n"}},
{"foo\nbar\n", []string{"foo\n", "bar\n", "\n"}},
}
for _, test := range allTests {
assertEqual(t, SplitLines(test.input), test.want)
}
}
func benchmarkSplitLines(b *testing.B, count int) {
str := strings.Repeat("foo\n", count)
b.ResetTimer()
n := 0
for i := 0; i < b.N; i++ {
n += len(SplitLines(str))
}
}
func BenchmarkSplitLines100(b *testing.B) {
benchmarkSplitLines(b, 100)
}
func BenchmarkSplitLines10000(b *testing.B) {
benchmarkSplitLines(b, 10000)
}

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/*
* CODE GENERATED AUTOMATICALLY WITH github.com/stretchr/testify/_codegen
* THIS FILE MUST NOT BE EDITED BY HAND
*/
package assert
import (
http "net/http"
url "net/url"
time "time"
)
// Conditionf uses a Comparison to assert a complex condition.
func Conditionf(t TestingT, comp Comparison, msg string, args ...interface{}) bool {
return Condition(t, comp, append([]interface{}{msg}, args...)...)
}
// Containsf asserts that the specified string, list(array, slice...) or map contains the
// specified substring or element.
//
// assert.Containsf(t, "Hello World", "World", "error message %s", "formatted")
// assert.Containsf(t, ["Hello", "World"], "World", "error message %s", "formatted")
// assert.Containsf(t, {"Hello": "World"}, "Hello", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Containsf(t TestingT, s interface{}, contains interface{}, msg string, args ...interface{}) bool {
return Contains(t, s, contains, append([]interface{}{msg}, args...)...)
}
// Emptyf asserts that the specified object is empty. I.e. nil, "", false, 0 or either
// a slice or a channel with len == 0.
//
// assert.Emptyf(t, obj, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Emptyf(t TestingT, object interface{}, msg string, args ...interface{}) bool {
return Empty(t, object, append([]interface{}{msg}, args...)...)
}
// Equalf asserts that two objects are equal.
//
// assert.Equalf(t, 123, 123, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
//
// Pointer variable equality is determined based on the equality of the
// referenced values (as opposed to the memory addresses). Function equality
// cannot be determined and will always fail.
func Equalf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool {
return Equal(t, expected, actual, append([]interface{}{msg}, args...)...)
}
// EqualErrorf asserts that a function returned an error (i.e. not `nil`)
// and that it is equal to the provided error.
//
// actualObj, err := SomeFunction()
// assert.EqualErrorf(t, err, expectedErrorString, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func EqualErrorf(t TestingT, theError error, errString string, msg string, args ...interface{}) bool {
return EqualError(t, theError, errString, append([]interface{}{msg}, args...)...)
}
// EqualValuesf asserts that two objects are equal or convertable to the same types
// and equal.
//
// assert.EqualValuesf(t, uint32(123, "error message %s", "formatted"), int32(123))
//
// Returns whether the assertion was successful (true) or not (false).
func EqualValuesf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool {
return EqualValues(t, expected, actual, append([]interface{}{msg}, args...)...)
}
// Errorf asserts that a function returned an error (i.e. not `nil`).
//
// actualObj, err := SomeFunction()
// if assert.Errorf(t, err, "error message %s", "formatted") {
// assert.Equal(t, expectedErrorf, err)
// }
//
// Returns whether the assertion was successful (true) or not (false).
func Errorf(t TestingT, err error, msg string, args ...interface{}) bool {
return Error(t, err, append([]interface{}{msg}, args...)...)
}
// Exactlyf asserts that two objects are equal is value and type.
//
// assert.Exactlyf(t, int32(123, "error message %s", "formatted"), int64(123))
//
// Returns whether the assertion was successful (true) or not (false).
func Exactlyf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool {
return Exactly(t, expected, actual, append([]interface{}{msg}, args...)...)
}
// Failf reports a failure through
func Failf(t TestingT, failureMessage string, msg string, args ...interface{}) bool {
return Fail(t, failureMessage, append([]interface{}{msg}, args...)...)
}
// FailNowf fails test
func FailNowf(t TestingT, failureMessage string, msg string, args ...interface{}) bool {
return FailNow(t, failureMessage, append([]interface{}{msg}, args...)...)
}
// Falsef asserts that the specified value is false.
//
// assert.Falsef(t, myBool, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Falsef(t TestingT, value bool, msg string, args ...interface{}) bool {
return False(t, value, append([]interface{}{msg}, args...)...)
}
// HTTPBodyContainsf asserts that a specified handler returns a
// body that contains a string.
//
// assert.HTTPBodyContainsf(t, myHandler, "www.google.com", nil, "I'm Feeling Lucky", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func HTTPBodyContainsf(t TestingT, handler http.HandlerFunc, method string, url string, values url.Values, str interface{}) bool {
return HTTPBodyContains(t, handler, method, url, values, str)
}
// HTTPBodyNotContainsf asserts that a specified handler returns a
// body that does not contain a string.
//
// assert.HTTPBodyNotContainsf(t, myHandler, "www.google.com", nil, "I'm Feeling Lucky", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func HTTPBodyNotContainsf(t TestingT, handler http.HandlerFunc, method string, url string, values url.Values, str interface{}) bool {
return HTTPBodyNotContains(t, handler, method, url, values, str)
}
// HTTPErrorf asserts that a specified handler returns an error status code.
//
// assert.HTTPErrorf(t, myHandler, "POST", "/a/b/c", url.Values{"a": []string{"b", "c"}}
//
// Returns whether the assertion was successful (true, "error message %s", "formatted") or not (false).
func HTTPErrorf(t TestingT, handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPError(t, handler, method, url, values)
}
// HTTPRedirectf asserts that a specified handler returns a redirect status code.
//
// assert.HTTPRedirectf(t, myHandler, "GET", "/a/b/c", url.Values{"a": []string{"b", "c"}}
//
// Returns whether the assertion was successful (true, "error message %s", "formatted") or not (false).
func HTTPRedirectf(t TestingT, handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPRedirect(t, handler, method, url, values)
}
// HTTPSuccessf asserts that a specified handler returns a success status code.
//
// assert.HTTPSuccessf(t, myHandler, "POST", "http://www.google.com", nil, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func HTTPSuccessf(t TestingT, handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPSuccess(t, handler, method, url, values)
}
// Implementsf asserts that an object is implemented by the specified interface.
//
// assert.Implementsf(t, (*MyInterface, "error message %s", "formatted")(nil), new(MyObject))
func Implementsf(t TestingT, interfaceObject interface{}, object interface{}, msg string, args ...interface{}) bool {
return Implements(t, interfaceObject, object, append([]interface{}{msg}, args...)...)
}
// InDeltaf asserts that the two numerals are within delta of each other.
//
// assert.InDeltaf(t, math.Pi, (22 / 7.0, "error message %s", "formatted"), 0.01)
//
// Returns whether the assertion was successful (true) or not (false).
func InDeltaf(t TestingT, expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool {
return InDelta(t, expected, actual, delta, append([]interface{}{msg}, args...)...)
}
// InDeltaSlicef is the same as InDelta, except it compares two slices.
func InDeltaSlicef(t TestingT, expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool {
return InDeltaSlice(t, expected, actual, delta, append([]interface{}{msg}, args...)...)
}
// InEpsilonf asserts that expected and actual have a relative error less than epsilon
//
// Returns whether the assertion was successful (true) or not (false).
func InEpsilonf(t TestingT, expected interface{}, actual interface{}, epsilon float64, msg string, args ...interface{}) bool {
return InEpsilon(t, expected, actual, epsilon, append([]interface{}{msg}, args...)...)
}
// InEpsilonSlicef is the same as InEpsilon, except it compares each value from two slices.
func InEpsilonSlicef(t TestingT, expected interface{}, actual interface{}, epsilon float64, msg string, args ...interface{}) bool {
return InEpsilonSlice(t, expected, actual, epsilon, append([]interface{}{msg}, args...)...)
}
// IsTypef asserts that the specified objects are of the same type.
func IsTypef(t TestingT, expectedType interface{}, object interface{}, msg string, args ...interface{}) bool {
return IsType(t, expectedType, object, append([]interface{}{msg}, args...)...)
}
// JSONEqf asserts that two JSON strings are equivalent.
//
// assert.JSONEqf(t, `{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func JSONEqf(t TestingT, expected string, actual string, msg string, args ...interface{}) bool {
return JSONEq(t, expected, actual, append([]interface{}{msg}, args...)...)
}
// Lenf asserts that the specified object has specific length.
// Lenf also fails if the object has a type that len() not accept.
//
// assert.Lenf(t, mySlice, 3, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Lenf(t TestingT, object interface{}, length int, msg string, args ...interface{}) bool {
return Len(t, object, length, append([]interface{}{msg}, args...)...)
}
// Nilf asserts that the specified object is nil.
//
// assert.Nilf(t, err, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Nilf(t TestingT, object interface{}, msg string, args ...interface{}) bool {
return Nil(t, object, append([]interface{}{msg}, args...)...)
}
// NoErrorf asserts that a function returned no error (i.e. `nil`).
//
// actualObj, err := SomeFunction()
// if assert.NoErrorf(t, err, "error message %s", "formatted") {
// assert.Equal(t, expectedObj, actualObj)
// }
//
// Returns whether the assertion was successful (true) or not (false).
func NoErrorf(t TestingT, err error, msg string, args ...interface{}) bool {
return NoError(t, err, append([]interface{}{msg}, args...)...)
}
// NotContainsf asserts that the specified string, list(array, slice...) or map does NOT contain the
// specified substring or element.
//
// assert.NotContainsf(t, "Hello World", "Earth", "error message %s", "formatted")
// assert.NotContainsf(t, ["Hello", "World"], "Earth", "error message %s", "formatted")
// assert.NotContainsf(t, {"Hello": "World"}, "Earth", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func NotContainsf(t TestingT, s interface{}, contains interface{}, msg string, args ...interface{}) bool {
return NotContains(t, s, contains, append([]interface{}{msg}, args...)...)
}
// NotEmptyf asserts that the specified object is NOT empty. I.e. not nil, "", false, 0 or either
// a slice or a channel with len == 0.
//
// if assert.NotEmptyf(t, obj, "error message %s", "formatted") {
// assert.Equal(t, "two", obj[1])
// }
//
// Returns whether the assertion was successful (true) or not (false).
func NotEmptyf(t TestingT, object interface{}, msg string, args ...interface{}) bool {
return NotEmpty(t, object, append([]interface{}{msg}, args...)...)
}
// NotEqualf asserts that the specified values are NOT equal.
//
// assert.NotEqualf(t, obj1, obj2, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
//
// Pointer variable equality is determined based on the equality of the
// referenced values (as opposed to the memory addresses).
func NotEqualf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool {
return NotEqual(t, expected, actual, append([]interface{}{msg}, args...)...)
}
// NotNilf asserts that the specified object is not nil.
//
// assert.NotNilf(t, err, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func NotNilf(t TestingT, object interface{}, msg string, args ...interface{}) bool {
return NotNil(t, object, append([]interface{}{msg}, args...)...)
}
// NotPanicsf asserts that the code inside the specified PanicTestFunc does NOT panic.
//
// assert.NotPanicsf(t, func(){ RemainCalm() }, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func NotPanicsf(t TestingT, f PanicTestFunc, msg string, args ...interface{}) bool {
return NotPanics(t, f, append([]interface{}{msg}, args...)...)
}
// NotRegexpf asserts that a specified regexp does not match a string.
//
// assert.NotRegexpf(t, regexp.MustCompile("starts", "error message %s", "formatted"), "it's starting")
// assert.NotRegexpf(t, "^start", "it's not starting", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func NotRegexpf(t TestingT, rx interface{}, str interface{}, msg string, args ...interface{}) bool {
return NotRegexp(t, rx, str, append([]interface{}{msg}, args...)...)
}
// NotSubsetf asserts that the specified list(array, slice...) contains not all
// elements given in the specified subset(array, slice...).
//
// assert.NotSubsetf(t, [1, 3, 4], [1, 2], "But [1, 3, 4] does not contain [1, 2]", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func NotSubsetf(t TestingT, list interface{}, subset interface{}, msg string, args ...interface{}) bool {
return NotSubset(t, list, subset, append([]interface{}{msg}, args...)...)
}
// NotZerof asserts that i is not the zero value for its type and returns the truth.
func NotZerof(t TestingT, i interface{}, msg string, args ...interface{}) bool {
return NotZero(t, i, append([]interface{}{msg}, args...)...)
}
// Panicsf asserts that the code inside the specified PanicTestFunc panics.
//
// assert.Panicsf(t, func(){ GoCrazy() }, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Panicsf(t TestingT, f PanicTestFunc, msg string, args ...interface{}) bool {
return Panics(t, f, append([]interface{}{msg}, args...)...)
}
// PanicsWithValuef asserts that the code inside the specified PanicTestFunc panics, and that
// the recovered panic value equals the expected panic value.
//
// assert.PanicsWithValuef(t, "crazy error", func(){ GoCrazy() }, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func PanicsWithValuef(t TestingT, expected interface{}, f PanicTestFunc, msg string, args ...interface{}) bool {
return PanicsWithValue(t, expected, f, append([]interface{}{msg}, args...)...)
}
// Regexpf asserts that a specified regexp matches a string.
//
// assert.Regexpf(t, regexp.MustCompile("start", "error message %s", "formatted"), "it's starting")
// assert.Regexpf(t, "start...$", "it's not starting", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Regexpf(t TestingT, rx interface{}, str interface{}, msg string, args ...interface{}) bool {
return Regexp(t, rx, str, append([]interface{}{msg}, args...)...)
}
// Subsetf asserts that the specified list(array, slice...) contains all
// elements given in the specified subset(array, slice...).
//
// assert.Subsetf(t, [1, 2, 3], [1, 2], "But [1, 2, 3] does contain [1, 2]", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Subsetf(t TestingT, list interface{}, subset interface{}, msg string, args ...interface{}) bool {
return Subset(t, list, subset, append([]interface{}{msg}, args...)...)
}
// Truef asserts that the specified value is true.
//
// assert.Truef(t, myBool, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func Truef(t TestingT, value bool, msg string, args ...interface{}) bool {
return True(t, value, append([]interface{}{msg}, args...)...)
}
// WithinDurationf asserts that the two times are within duration delta of each other.
//
// assert.WithinDurationf(t, time.Now(), time.Now(), 10*time.Second, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func WithinDurationf(t TestingT, expected time.Time, actual time.Time, delta time.Duration, msg string, args ...interface{}) bool {
return WithinDuration(t, expected, actual, delta, append([]interface{}{msg}, args...)...)
}
// Zerof asserts that i is the zero value for its type and returns the truth.
func Zerof(t TestingT, i interface{}, msg string, args ...interface{}) bool {
return Zero(t, i, append([]interface{}{msg}, args...)...)
}

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vendor/github.com/stretchr/testify/assert/assertion_format.go.tmpl generated vendored Normal file
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@ -0,0 +1,4 @@
{{.CommentFormat}}
func {{.DocInfo.Name}}f(t TestingT, {{.ParamsFormat}}) bool {
return {{.DocInfo.Name}}(t, {{.ForwardedParamsFormat}})
}

746
vendor/github.com/stretchr/testify/assert/assertion_forward.go generated vendored Normal file
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@ -0,0 +1,746 @@
/*
* CODE GENERATED AUTOMATICALLY WITH github.com/stretchr/testify/_codegen
* THIS FILE MUST NOT BE EDITED BY HAND
*/
package assert
import (
http "net/http"
url "net/url"
time "time"
)
// Condition uses a Comparison to assert a complex condition.
func (a *Assertions) Condition(comp Comparison, msgAndArgs ...interface{}) bool {
return Condition(a.t, comp, msgAndArgs...)
}
// Conditionf uses a Comparison to assert a complex condition.
func (a *Assertions) Conditionf(comp Comparison, msg string, args ...interface{}) bool {
return Conditionf(a.t, comp, msg, args...)
}
// Contains asserts that the specified string, list(array, slice...) or map contains the
// specified substring or element.
//
// a.Contains("Hello World", "World")
// a.Contains(["Hello", "World"], "World")
// a.Contains({"Hello": "World"}, "Hello")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Contains(s interface{}, contains interface{}, msgAndArgs ...interface{}) bool {
return Contains(a.t, s, contains, msgAndArgs...)
}
// Containsf asserts that the specified string, list(array, slice...) or map contains the
// specified substring or element.
//
// a.Containsf("Hello World", "World", "error message %s", "formatted")
// a.Containsf(["Hello", "World"], "World", "error message %s", "formatted")
// a.Containsf({"Hello": "World"}, "Hello", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Containsf(s interface{}, contains interface{}, msg string, args ...interface{}) bool {
return Containsf(a.t, s, contains, msg, args...)
}
// Empty asserts that the specified object is empty. I.e. nil, "", false, 0 or either
// a slice or a channel with len == 0.
//
// a.Empty(obj)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Empty(object interface{}, msgAndArgs ...interface{}) bool {
return Empty(a.t, object, msgAndArgs...)
}
// Emptyf asserts that the specified object is empty. I.e. nil, "", false, 0 or either
// a slice or a channel with len == 0.
//
// a.Emptyf(obj, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Emptyf(object interface{}, msg string, args ...interface{}) bool {
return Emptyf(a.t, object, msg, args...)
}
// Equal asserts that two objects are equal.
//
// a.Equal(123, 123)
//
// Returns whether the assertion was successful (true) or not (false).
//
// Pointer variable equality is determined based on the equality of the
// referenced values (as opposed to the memory addresses). Function equality
// cannot be determined and will always fail.
func (a *Assertions) Equal(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool {
return Equal(a.t, expected, actual, msgAndArgs...)
}
// EqualError asserts that a function returned an error (i.e. not `nil`)
// and that it is equal to the provided error.
//
// actualObj, err := SomeFunction()
// a.EqualError(err, expectedErrorString)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) EqualError(theError error, errString string, msgAndArgs ...interface{}) bool {
return EqualError(a.t, theError, errString, msgAndArgs...)
}
// EqualErrorf asserts that a function returned an error (i.e. not `nil`)
// and that it is equal to the provided error.
//
// actualObj, err := SomeFunction()
// a.EqualErrorf(err, expectedErrorString, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) EqualErrorf(theError error, errString string, msg string, args ...interface{}) bool {
return EqualErrorf(a.t, theError, errString, msg, args...)
}
// EqualValues asserts that two objects are equal or convertable to the same types
// and equal.
//
// a.EqualValues(uint32(123), int32(123))
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) EqualValues(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool {
return EqualValues(a.t, expected, actual, msgAndArgs...)
}
// EqualValuesf asserts that two objects are equal or convertable to the same types
// and equal.
//
// a.EqualValuesf(uint32(123, "error message %s", "formatted"), int32(123))
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) EqualValuesf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool {
return EqualValuesf(a.t, expected, actual, msg, args...)
}
// Equalf asserts that two objects are equal.
//
// a.Equalf(123, 123, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
//
// Pointer variable equality is determined based on the equality of the
// referenced values (as opposed to the memory addresses). Function equality
// cannot be determined and will always fail.
func (a *Assertions) Equalf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool {
return Equalf(a.t, expected, actual, msg, args...)
}
// Error asserts that a function returned an error (i.e. not `nil`).
//
// actualObj, err := SomeFunction()
// if a.Error(err) {
// assert.Equal(t, expectedError, err)
// }
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Error(err error, msgAndArgs ...interface{}) bool {
return Error(a.t, err, msgAndArgs...)
}
// Errorf asserts that a function returned an error (i.e. not `nil`).
//
// actualObj, err := SomeFunction()
// if a.Errorf(err, "error message %s", "formatted") {
// assert.Equal(t, expectedErrorf, err)
// }
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Errorf(err error, msg string, args ...interface{}) bool {
return Errorf(a.t, err, msg, args...)
}
// Exactly asserts that two objects are equal is value and type.
//
// a.Exactly(int32(123), int64(123))
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Exactly(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool {
return Exactly(a.t, expected, actual, msgAndArgs...)
}
// Exactlyf asserts that two objects are equal is value and type.
//
// a.Exactlyf(int32(123, "error message %s", "formatted"), int64(123))
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Exactlyf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool {
return Exactlyf(a.t, expected, actual, msg, args...)
}
// Fail reports a failure through
func (a *Assertions) Fail(failureMessage string, msgAndArgs ...interface{}) bool {
return Fail(a.t, failureMessage, msgAndArgs...)
}
// FailNow fails test
func (a *Assertions) FailNow(failureMessage string, msgAndArgs ...interface{}) bool {
return FailNow(a.t, failureMessage, msgAndArgs...)
}
// FailNowf fails test
func (a *Assertions) FailNowf(failureMessage string, msg string, args ...interface{}) bool {
return FailNowf(a.t, failureMessage, msg, args...)
}
// Failf reports a failure through
func (a *Assertions) Failf(failureMessage string, msg string, args ...interface{}) bool {
return Failf(a.t, failureMessage, msg, args...)
}
// False asserts that the specified value is false.
//
// a.False(myBool)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) False(value bool, msgAndArgs ...interface{}) bool {
return False(a.t, value, msgAndArgs...)
}
// Falsef asserts that the specified value is false.
//
// a.Falsef(myBool, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Falsef(value bool, msg string, args ...interface{}) bool {
return Falsef(a.t, value, msg, args...)
}
// HTTPBodyContains asserts that a specified handler returns a
// body that contains a string.
//
// a.HTTPBodyContains(myHandler, "www.google.com", nil, "I'm Feeling Lucky")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) HTTPBodyContains(handler http.HandlerFunc, method string, url string, values url.Values, str interface{}) bool {
return HTTPBodyContains(a.t, handler, method, url, values, str)
}
// HTTPBodyContainsf asserts that a specified handler returns a
// body that contains a string.
//
// a.HTTPBodyContainsf(myHandler, "www.google.com", nil, "I'm Feeling Lucky", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) HTTPBodyContainsf(handler http.HandlerFunc, method string, url string, values url.Values, str interface{}) bool {
return HTTPBodyContainsf(a.t, handler, method, url, values, str)
}
// HTTPBodyNotContains asserts that a specified handler returns a
// body that does not contain a string.
//
// a.HTTPBodyNotContains(myHandler, "www.google.com", nil, "I'm Feeling Lucky")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) HTTPBodyNotContains(handler http.HandlerFunc, method string, url string, values url.Values, str interface{}) bool {
return HTTPBodyNotContains(a.t, handler, method, url, values, str)
}
// HTTPBodyNotContainsf asserts that a specified handler returns a
// body that does not contain a string.
//
// a.HTTPBodyNotContainsf(myHandler, "www.google.com", nil, "I'm Feeling Lucky", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) HTTPBodyNotContainsf(handler http.HandlerFunc, method string, url string, values url.Values, str interface{}) bool {
return HTTPBodyNotContainsf(a.t, handler, method, url, values, str)
}
// HTTPError asserts that a specified handler returns an error status code.
//
// a.HTTPError(myHandler, "POST", "/a/b/c", url.Values{"a": []string{"b", "c"}}
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) HTTPError(handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPError(a.t, handler, method, url, values)
}
// HTTPErrorf asserts that a specified handler returns an error status code.
//
// a.HTTPErrorf(myHandler, "POST", "/a/b/c", url.Values{"a": []string{"b", "c"}}
//
// Returns whether the assertion was successful (true, "error message %s", "formatted") or not (false).
func (a *Assertions) HTTPErrorf(handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPErrorf(a.t, handler, method, url, values)
}
// HTTPRedirect asserts that a specified handler returns a redirect status code.
//
// a.HTTPRedirect(myHandler, "GET", "/a/b/c", url.Values{"a": []string{"b", "c"}}
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) HTTPRedirect(handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPRedirect(a.t, handler, method, url, values)
}
// HTTPRedirectf asserts that a specified handler returns a redirect status code.
//
// a.HTTPRedirectf(myHandler, "GET", "/a/b/c", url.Values{"a": []string{"b", "c"}}
//
// Returns whether the assertion was successful (true, "error message %s", "formatted") or not (false).
func (a *Assertions) HTTPRedirectf(handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPRedirectf(a.t, handler, method, url, values)
}
// HTTPSuccess asserts that a specified handler returns a success status code.
//
// a.HTTPSuccess(myHandler, "POST", "http://www.google.com", nil)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) HTTPSuccess(handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPSuccess(a.t, handler, method, url, values)
}
// HTTPSuccessf asserts that a specified handler returns a success status code.
//
// a.HTTPSuccessf(myHandler, "POST", "http://www.google.com", nil, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) HTTPSuccessf(handler http.HandlerFunc, method string, url string, values url.Values) bool {
return HTTPSuccessf(a.t, handler, method, url, values)
}
// Implements asserts that an object is implemented by the specified interface.
//
// a.Implements((*MyInterface)(nil), new(MyObject))
func (a *Assertions) Implements(interfaceObject interface{}, object interface{}, msgAndArgs ...interface{}) bool {
return Implements(a.t, interfaceObject, object, msgAndArgs...)
}
// Implementsf asserts that an object is implemented by the specified interface.
//
// a.Implementsf((*MyInterface, "error message %s", "formatted")(nil), new(MyObject))
func (a *Assertions) Implementsf(interfaceObject interface{}, object interface{}, msg string, args ...interface{}) bool {
return Implementsf(a.t, interfaceObject, object, msg, args...)
}
// InDelta asserts that the two numerals are within delta of each other.
//
// a.InDelta(math.Pi, (22 / 7.0), 0.01)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) InDelta(expected interface{}, actual interface{}, delta float64, msgAndArgs ...interface{}) bool {
return InDelta(a.t, expected, actual, delta, msgAndArgs...)
}
// InDeltaSlice is the same as InDelta, except it compares two slices.
func (a *Assertions) InDeltaSlice(expected interface{}, actual interface{}, delta float64, msgAndArgs ...interface{}) bool {
return InDeltaSlice(a.t, expected, actual, delta, msgAndArgs...)
}
// InDeltaSlicef is the same as InDelta, except it compares two slices.
func (a *Assertions) InDeltaSlicef(expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool {
return InDeltaSlicef(a.t, expected, actual, delta, msg, args...)
}
// InDeltaf asserts that the two numerals are within delta of each other.
//
// a.InDeltaf(math.Pi, (22 / 7.0, "error message %s", "formatted"), 0.01)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) InDeltaf(expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool {
return InDeltaf(a.t, expected, actual, delta, msg, args...)
}
// InEpsilon asserts that expected and actual have a relative error less than epsilon
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) InEpsilon(expected interface{}, actual interface{}, epsilon float64, msgAndArgs ...interface{}) bool {
return InEpsilon(a.t, expected, actual, epsilon, msgAndArgs...)
}
// InEpsilonSlice is the same as InEpsilon, except it compares each value from two slices.
func (a *Assertions) InEpsilonSlice(expected interface{}, actual interface{}, epsilon float64, msgAndArgs ...interface{}) bool {
return InEpsilonSlice(a.t, expected, actual, epsilon, msgAndArgs...)
}
// InEpsilonSlicef is the same as InEpsilon, except it compares each value from two slices.
func (a *Assertions) InEpsilonSlicef(expected interface{}, actual interface{}, epsilon float64, msg string, args ...interface{}) bool {
return InEpsilonSlicef(a.t, expected, actual, epsilon, msg, args...)
}
// InEpsilonf asserts that expected and actual have a relative error less than epsilon
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) InEpsilonf(expected interface{}, actual interface{}, epsilon float64, msg string, args ...interface{}) bool {
return InEpsilonf(a.t, expected, actual, epsilon, msg, args...)
}
// IsType asserts that the specified objects are of the same type.
func (a *Assertions) IsType(expectedType interface{}, object interface{}, msgAndArgs ...interface{}) bool {
return IsType(a.t, expectedType, object, msgAndArgs...)
}
// IsTypef asserts that the specified objects are of the same type.
func (a *Assertions) IsTypef(expectedType interface{}, object interface{}, msg string, args ...interface{}) bool {
return IsTypef(a.t, expectedType, object, msg, args...)
}
// JSONEq asserts that two JSON strings are equivalent.
//
// a.JSONEq(`{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) JSONEq(expected string, actual string, msgAndArgs ...interface{}) bool {
return JSONEq(a.t, expected, actual, msgAndArgs...)
}
// JSONEqf asserts that two JSON strings are equivalent.
//
// a.JSONEqf(`{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) JSONEqf(expected string, actual string, msg string, args ...interface{}) bool {
return JSONEqf(a.t, expected, actual, msg, args...)
}
// Len asserts that the specified object has specific length.
// Len also fails if the object has a type that len() not accept.
//
// a.Len(mySlice, 3)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Len(object interface{}, length int, msgAndArgs ...interface{}) bool {
return Len(a.t, object, length, msgAndArgs...)
}
// Lenf asserts that the specified object has specific length.
// Lenf also fails if the object has a type that len() not accept.
//
// a.Lenf(mySlice, 3, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Lenf(object interface{}, length int, msg string, args ...interface{}) bool {
return Lenf(a.t, object, length, msg, args...)
}
// Nil asserts that the specified object is nil.
//
// a.Nil(err)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Nil(object interface{}, msgAndArgs ...interface{}) bool {
return Nil(a.t, object, msgAndArgs...)
}
// Nilf asserts that the specified object is nil.
//
// a.Nilf(err, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Nilf(object interface{}, msg string, args ...interface{}) bool {
return Nilf(a.t, object, msg, args...)
}
// NoError asserts that a function returned no error (i.e. `nil`).
//
// actualObj, err := SomeFunction()
// if a.NoError(err) {
// assert.Equal(t, expectedObj, actualObj)
// }
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NoError(err error, msgAndArgs ...interface{}) bool {
return NoError(a.t, err, msgAndArgs...)
}
// NoErrorf asserts that a function returned no error (i.e. `nil`).
//
// actualObj, err := SomeFunction()
// if a.NoErrorf(err, "error message %s", "formatted") {
// assert.Equal(t, expectedObj, actualObj)
// }
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NoErrorf(err error, msg string, args ...interface{}) bool {
return NoErrorf(a.t, err, msg, args...)
}
// NotContains asserts that the specified string, list(array, slice...) or map does NOT contain the
// specified substring or element.
//
// a.NotContains("Hello World", "Earth")
// a.NotContains(["Hello", "World"], "Earth")
// a.NotContains({"Hello": "World"}, "Earth")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotContains(s interface{}, contains interface{}, msgAndArgs ...interface{}) bool {
return NotContains(a.t, s, contains, msgAndArgs...)
}
// NotContainsf asserts that the specified string, list(array, slice...) or map does NOT contain the
// specified substring or element.
//
// a.NotContainsf("Hello World", "Earth", "error message %s", "formatted")
// a.NotContainsf(["Hello", "World"], "Earth", "error message %s", "formatted")
// a.NotContainsf({"Hello": "World"}, "Earth", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotContainsf(s interface{}, contains interface{}, msg string, args ...interface{}) bool {
return NotContainsf(a.t, s, contains, msg, args...)
}
// NotEmpty asserts that the specified object is NOT empty. I.e. not nil, "", false, 0 or either
// a slice or a channel with len == 0.
//
// if a.NotEmpty(obj) {
// assert.Equal(t, "two", obj[1])
// }
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotEmpty(object interface{}, msgAndArgs ...interface{}) bool {
return NotEmpty(a.t, object, msgAndArgs...)
}
// NotEmptyf asserts that the specified object is NOT empty. I.e. not nil, "", false, 0 or either
// a slice or a channel with len == 0.
//
// if a.NotEmptyf(obj, "error message %s", "formatted") {
// assert.Equal(t, "two", obj[1])
// }
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotEmptyf(object interface{}, msg string, args ...interface{}) bool {
return NotEmptyf(a.t, object, msg, args...)
}
// NotEqual asserts that the specified values are NOT equal.
//
// a.NotEqual(obj1, obj2)
//
// Returns whether the assertion was successful (true) or not (false).
//
// Pointer variable equality is determined based on the equality of the
// referenced values (as opposed to the memory addresses).
func (a *Assertions) NotEqual(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool {
return NotEqual(a.t, expected, actual, msgAndArgs...)
}
// NotEqualf asserts that the specified values are NOT equal.
//
// a.NotEqualf(obj1, obj2, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
//
// Pointer variable equality is determined based on the equality of the
// referenced values (as opposed to the memory addresses).
func (a *Assertions) NotEqualf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool {
return NotEqualf(a.t, expected, actual, msg, args...)
}
// NotNil asserts that the specified object is not nil.
//
// a.NotNil(err)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotNil(object interface{}, msgAndArgs ...interface{}) bool {
return NotNil(a.t, object, msgAndArgs...)
}
// NotNilf asserts that the specified object is not nil.
//
// a.NotNilf(err, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotNilf(object interface{}, msg string, args ...interface{}) bool {
return NotNilf(a.t, object, msg, args...)
}
// NotPanics asserts that the code inside the specified PanicTestFunc does NOT panic.
//
// a.NotPanics(func(){ RemainCalm() })
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotPanics(f PanicTestFunc, msgAndArgs ...interface{}) bool {
return NotPanics(a.t, f, msgAndArgs...)
}
// NotPanicsf asserts that the code inside the specified PanicTestFunc does NOT panic.
//
// a.NotPanicsf(func(){ RemainCalm() }, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotPanicsf(f PanicTestFunc, msg string, args ...interface{}) bool {
return NotPanicsf(a.t, f, msg, args...)
}
// NotRegexp asserts that a specified regexp does not match a string.
//
// a.NotRegexp(regexp.MustCompile("starts"), "it's starting")
// a.NotRegexp("^start", "it's not starting")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotRegexp(rx interface{}, str interface{}, msgAndArgs ...interface{}) bool {
return NotRegexp(a.t, rx, str, msgAndArgs...)
}
// NotRegexpf asserts that a specified regexp does not match a string.
//
// a.NotRegexpf(regexp.MustCompile("starts", "error message %s", "formatted"), "it's starting")
// a.NotRegexpf("^start", "it's not starting", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotRegexpf(rx interface{}, str interface{}, msg string, args ...interface{}) bool {
return NotRegexpf(a.t, rx, str, msg, args...)
}
// NotSubset asserts that the specified list(array, slice...) contains not all
// elements given in the specified subset(array, slice...).
//
// a.NotSubset([1, 3, 4], [1, 2], "But [1, 3, 4] does not contain [1, 2]")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotSubset(list interface{}, subset interface{}, msgAndArgs ...interface{}) bool {
return NotSubset(a.t, list, subset, msgAndArgs...)
}
// NotSubsetf asserts that the specified list(array, slice...) contains not all
// elements given in the specified subset(array, slice...).
//
// a.NotSubsetf([1, 3, 4], [1, 2], "But [1, 3, 4] does not contain [1, 2]", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) NotSubsetf(list interface{}, subset interface{}, msg string, args ...interface{}) bool {
return NotSubsetf(a.t, list, subset, msg, args...)
}
// NotZero asserts that i is not the zero value for its type and returns the truth.
func (a *Assertions) NotZero(i interface{}, msgAndArgs ...interface{}) bool {
return NotZero(a.t, i, msgAndArgs...)
}
// NotZerof asserts that i is not the zero value for its type and returns the truth.
func (a *Assertions) NotZerof(i interface{}, msg string, args ...interface{}) bool {
return NotZerof(a.t, i, msg, args...)
}
// Panics asserts that the code inside the specified PanicTestFunc panics.
//
// a.Panics(func(){ GoCrazy() })
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Panics(f PanicTestFunc, msgAndArgs ...interface{}) bool {
return Panics(a.t, f, msgAndArgs...)
}
// PanicsWithValue asserts that the code inside the specified PanicTestFunc panics, and that
// the recovered panic value equals the expected panic value.
//
// a.PanicsWithValue("crazy error", func(){ GoCrazy() })
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) PanicsWithValue(expected interface{}, f PanicTestFunc, msgAndArgs ...interface{}) bool {
return PanicsWithValue(a.t, expected, f, msgAndArgs...)
}
// PanicsWithValuef asserts that the code inside the specified PanicTestFunc panics, and that
// the recovered panic value equals the expected panic value.
//
// a.PanicsWithValuef("crazy error", func(){ GoCrazy() }, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) PanicsWithValuef(expected interface{}, f PanicTestFunc, msg string, args ...interface{}) bool {
return PanicsWithValuef(a.t, expected, f, msg, args...)
}
// Panicsf asserts that the code inside the specified PanicTestFunc panics.
//
// a.Panicsf(func(){ GoCrazy() }, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Panicsf(f PanicTestFunc, msg string, args ...interface{}) bool {
return Panicsf(a.t, f, msg, args...)
}
// Regexp asserts that a specified regexp matches a string.
//
// a.Regexp(regexp.MustCompile("start"), "it's starting")
// a.Regexp("start...$", "it's not starting")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Regexp(rx interface{}, str interface{}, msgAndArgs ...interface{}) bool {
return Regexp(a.t, rx, str, msgAndArgs...)
}
// Regexpf asserts that a specified regexp matches a string.
//
// a.Regexpf(regexp.MustCompile("start", "error message %s", "formatted"), "it's starting")
// a.Regexpf("start...$", "it's not starting", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Regexpf(rx interface{}, str interface{}, msg string, args ...interface{}) bool {
return Regexpf(a.t, rx, str, msg, args...)
}
// Subset asserts that the specified list(array, slice...) contains all
// elements given in the specified subset(array, slice...).
//
// a.Subset([1, 2, 3], [1, 2], "But [1, 2, 3] does contain [1, 2]")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Subset(list interface{}, subset interface{}, msgAndArgs ...interface{}) bool {
return Subset(a.t, list, subset, msgAndArgs...)
}
// Subsetf asserts that the specified list(array, slice...) contains all
// elements given in the specified subset(array, slice...).
//
// a.Subsetf([1, 2, 3], [1, 2], "But [1, 2, 3] does contain [1, 2]", "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Subsetf(list interface{}, subset interface{}, msg string, args ...interface{}) bool {
return Subsetf(a.t, list, subset, msg, args...)
}
// True asserts that the specified value is true.
//
// a.True(myBool)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) True(value bool, msgAndArgs ...interface{}) bool {
return True(a.t, value, msgAndArgs...)
}
// Truef asserts that the specified value is true.
//
// a.Truef(myBool, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) Truef(value bool, msg string, args ...interface{}) bool {
return Truef(a.t, value, msg, args...)
}
// WithinDuration asserts that the two times are within duration delta of each other.
//
// a.WithinDuration(time.Now(), time.Now(), 10*time.Second)
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) WithinDuration(expected time.Time, actual time.Time, delta time.Duration, msgAndArgs ...interface{}) bool {
return WithinDuration(a.t, expected, actual, delta, msgAndArgs...)
}
// WithinDurationf asserts that the two times are within duration delta of each other.
//
// a.WithinDurationf(time.Now(), time.Now(), 10*time.Second, "error message %s", "formatted")
//
// Returns whether the assertion was successful (true) or not (false).
func (a *Assertions) WithinDurationf(expected time.Time, actual time.Time, delta time.Duration, msg string, args ...interface{}) bool {
return WithinDurationf(a.t, expected, actual, delta, msg, args...)
}
// Zero asserts that i is the zero value for its type and returns the truth.
func (a *Assertions) Zero(i interface{}, msgAndArgs ...interface{}) bool {
return Zero(a.t, i, msgAndArgs...)
}
// Zerof asserts that i is the zero value for its type and returns the truth.
func (a *Assertions) Zerof(i interface{}, msg string, args ...interface{}) bool {
return Zerof(a.t, i, msg, args...)
}

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{{.CommentWithoutT "a"}}
func (a *Assertions) {{.DocInfo.Name}}({{.Params}}) bool {
return {{.DocInfo.Name}}(a.t, {{.ForwardedParams}})
}

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// Package assert provides a set of comprehensive testing tools for use with the normal Go testing system.
//
// Example Usage
//
// The following is a complete example using assert in a standard test function:
// import (
// "testing"
// "github.com/stretchr/testify/assert"
// )
//
// func TestSomething(t *testing.T) {
//
// var a string = "Hello"
// var b string = "Hello"
//
// assert.Equal(t, a, b, "The two words should be the same.")
//
// }
//
// if you assert many times, use the format below:
//
// import (
// "testing"
// "github.com/stretchr/testify/assert"
// )
//
// func TestSomething(t *testing.T) {
// assert := assert.New(t)
//
// var a string = "Hello"
// var b string = "Hello"
//
// assert.Equal(a, b, "The two words should be the same.")
// }
//
// Assertions
//
// Assertions allow you to easily write test code, and are global funcs in the `assert` package.
// All assertion functions take, as the first argument, the `*testing.T` object provided by the
// testing framework. This allows the assertion funcs to write the failings and other details to
// the correct place.
//
// Every assertion function also takes an optional string message as the final argument,
// allowing custom error messages to be appended to the message the assertion method outputs.
package assert

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package assert
import (
"errors"
)
// AnError is an error instance useful for testing. If the code does not care
// about error specifics, and only needs to return the error for example, this
// error should be used to make the test code more readable.
var AnError = errors.New("assert.AnError general error for testing")

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package assert
// Assertions provides assertion methods around the
// TestingT interface.
type Assertions struct {
t TestingT
}
// New makes a new Assertions object for the specified TestingT.
func New(t TestingT) *Assertions {
return &Assertions{
t: t,
}
}
//go:generate go run ../_codegen/main.go -output-package=assert -template=assertion_forward.go.tmpl -include-format-funcs

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package assert
import (
"errors"
"regexp"
"testing"
"time"
)
func TestImplementsWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.Implements((*AssertionTesterInterface)(nil), new(AssertionTesterConformingObject)) {
t.Error("Implements method should return true: AssertionTesterConformingObject implements AssertionTesterInterface")
}
if assert.Implements((*AssertionTesterInterface)(nil), new(AssertionTesterNonConformingObject)) {
t.Error("Implements method should return false: AssertionTesterNonConformingObject does not implements AssertionTesterInterface")
}
}
func TestIsTypeWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.IsType(new(AssertionTesterConformingObject), new(AssertionTesterConformingObject)) {
t.Error("IsType should return true: AssertionTesterConformingObject is the same type as AssertionTesterConformingObject")
}
if assert.IsType(new(AssertionTesterConformingObject), new(AssertionTesterNonConformingObject)) {
t.Error("IsType should return false: AssertionTesterConformingObject is not the same type as AssertionTesterNonConformingObject")
}
}
func TestEqualWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.Equal("Hello World", "Hello World") {
t.Error("Equal should return true")
}
if !assert.Equal(123, 123) {
t.Error("Equal should return true")
}
if !assert.Equal(123.5, 123.5) {
t.Error("Equal should return true")
}
if !assert.Equal([]byte("Hello World"), []byte("Hello World")) {
t.Error("Equal should return true")
}
if !assert.Equal(nil, nil) {
t.Error("Equal should return true")
}
}
func TestEqualValuesWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.EqualValues(uint32(10), int32(10)) {
t.Error("EqualValues should return true")
}
}
func TestNotNilWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.NotNil(new(AssertionTesterConformingObject)) {
t.Error("NotNil should return true: object is not nil")
}
if assert.NotNil(nil) {
t.Error("NotNil should return false: object is nil")
}
}
func TestNilWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.Nil(nil) {
t.Error("Nil should return true: object is nil")
}
if assert.Nil(new(AssertionTesterConformingObject)) {
t.Error("Nil should return false: object is not nil")
}
}
func TestTrueWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.True(true) {
t.Error("True should return true")
}
if assert.True(false) {
t.Error("True should return false")
}
}
func TestFalseWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.False(false) {
t.Error("False should return true")
}
if assert.False(true) {
t.Error("False should return false")
}
}
func TestExactlyWrapper(t *testing.T) {
assert := New(new(testing.T))
a := float32(1)
b := float64(1)
c := float32(1)
d := float32(2)
if assert.Exactly(a, b) {
t.Error("Exactly should return false")
}
if assert.Exactly(a, d) {
t.Error("Exactly should return false")
}
if !assert.Exactly(a, c) {
t.Error("Exactly should return true")
}
if assert.Exactly(nil, a) {
t.Error("Exactly should return false")
}
if assert.Exactly(a, nil) {
t.Error("Exactly should return false")
}
}
func TestNotEqualWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.NotEqual("Hello World", "Hello World!") {
t.Error("NotEqual should return true")
}
if !assert.NotEqual(123, 1234) {
t.Error("NotEqual should return true")
}
if !assert.NotEqual(123.5, 123.55) {
t.Error("NotEqual should return true")
}
if !assert.NotEqual([]byte("Hello World"), []byte("Hello World!")) {
t.Error("NotEqual should return true")
}
if !assert.NotEqual(nil, new(AssertionTesterConformingObject)) {
t.Error("NotEqual should return true")
}
}
func TestContainsWrapper(t *testing.T) {
assert := New(new(testing.T))
list := []string{"Foo", "Bar"}
if !assert.Contains("Hello World", "Hello") {
t.Error("Contains should return true: \"Hello World\" contains \"Hello\"")
}
if assert.Contains("Hello World", "Salut") {
t.Error("Contains should return false: \"Hello World\" does not contain \"Salut\"")
}
if !assert.Contains(list, "Foo") {
t.Error("Contains should return true: \"[\"Foo\", \"Bar\"]\" contains \"Foo\"")
}
if assert.Contains(list, "Salut") {
t.Error("Contains should return false: \"[\"Foo\", \"Bar\"]\" does not contain \"Salut\"")
}
}
func TestNotContainsWrapper(t *testing.T) {
assert := New(new(testing.T))
list := []string{"Foo", "Bar"}
if !assert.NotContains("Hello World", "Hello!") {
t.Error("NotContains should return true: \"Hello World\" does not contain \"Hello!\"")
}
if assert.NotContains("Hello World", "Hello") {
t.Error("NotContains should return false: \"Hello World\" contains \"Hello\"")
}
if !assert.NotContains(list, "Foo!") {
t.Error("NotContains should return true: \"[\"Foo\", \"Bar\"]\" does not contain \"Foo!\"")
}
if assert.NotContains(list, "Foo") {
t.Error("NotContains should return false: \"[\"Foo\", \"Bar\"]\" contains \"Foo\"")
}
}
func TestConditionWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.Condition(func() bool { return true }, "Truth") {
t.Error("Condition should return true")
}
if assert.Condition(func() bool { return false }, "Lie") {
t.Error("Condition should return false")
}
}
func TestDidPanicWrapper(t *testing.T) {
if funcDidPanic, _ := didPanic(func() {
panic("Panic!")
}); !funcDidPanic {
t.Error("didPanic should return true")
}
if funcDidPanic, _ := didPanic(func() {
}); funcDidPanic {
t.Error("didPanic should return false")
}
}
func TestPanicsWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.Panics(func() {
panic("Panic!")
}) {
t.Error("Panics should return true")
}
if assert.Panics(func() {
}) {
t.Error("Panics should return false")
}
}
func TestNotPanicsWrapper(t *testing.T) {
assert := New(new(testing.T))
if !assert.NotPanics(func() {
}) {
t.Error("NotPanics should return true")
}
if assert.NotPanics(func() {
panic("Panic!")
}) {
t.Error("NotPanics should return false")
}
}
func TestNoErrorWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
// start with a nil error
var err error
assert.True(mockAssert.NoError(err), "NoError should return True for nil arg")
// now set an error
err = errors.New("Some error")
assert.False(mockAssert.NoError(err), "NoError with error should return False")
}
func TestErrorWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
// start with a nil error
var err error
assert.False(mockAssert.Error(err), "Error should return False for nil arg")
// now set an error
err = errors.New("Some error")
assert.True(mockAssert.Error(err), "Error with error should return True")
}
func TestEqualErrorWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
// start with a nil error
var err error
assert.False(mockAssert.EqualError(err, ""),
"EqualError should return false for nil arg")
// now set an error
err = errors.New("some error")
assert.False(mockAssert.EqualError(err, "Not some error"),
"EqualError should return false for different error string")
assert.True(mockAssert.EqualError(err, "some error"),
"EqualError should return true")
}
func TestEmptyWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
assert.True(mockAssert.Empty(""), "Empty string is empty")
assert.True(mockAssert.Empty(nil), "Nil is empty")
assert.True(mockAssert.Empty([]string{}), "Empty string array is empty")
assert.True(mockAssert.Empty(0), "Zero int value is empty")
assert.True(mockAssert.Empty(false), "False value is empty")
assert.False(mockAssert.Empty("something"), "Non Empty string is not empty")
assert.False(mockAssert.Empty(errors.New("something")), "Non nil object is not empty")
assert.False(mockAssert.Empty([]string{"something"}), "Non empty string array is not empty")
assert.False(mockAssert.Empty(1), "Non-zero int value is not empty")
assert.False(mockAssert.Empty(true), "True value is not empty")
}
func TestNotEmptyWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
assert.False(mockAssert.NotEmpty(""), "Empty string is empty")
assert.False(mockAssert.NotEmpty(nil), "Nil is empty")
assert.False(mockAssert.NotEmpty([]string{}), "Empty string array is empty")
assert.False(mockAssert.NotEmpty(0), "Zero int value is empty")
assert.False(mockAssert.NotEmpty(false), "False value is empty")
assert.True(mockAssert.NotEmpty("something"), "Non Empty string is not empty")
assert.True(mockAssert.NotEmpty(errors.New("something")), "Non nil object is not empty")
assert.True(mockAssert.NotEmpty([]string{"something"}), "Non empty string array is not empty")
assert.True(mockAssert.NotEmpty(1), "Non-zero int value is not empty")
assert.True(mockAssert.NotEmpty(true), "True value is not empty")
}
func TestLenWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
assert.False(mockAssert.Len(nil, 0), "nil does not have length")
assert.False(mockAssert.Len(0, 0), "int does not have length")
assert.False(mockAssert.Len(true, 0), "true does not have length")
assert.False(mockAssert.Len(false, 0), "false does not have length")
assert.False(mockAssert.Len('A', 0), "Rune does not have length")
assert.False(mockAssert.Len(struct{}{}, 0), "Struct does not have length")
ch := make(chan int, 5)
ch <- 1
ch <- 2
ch <- 3
cases := []struct {
v interface{}
l int
}{
{[]int{1, 2, 3}, 3},
{[...]int{1, 2, 3}, 3},
{"ABC", 3},
{map[int]int{1: 2, 2: 4, 3: 6}, 3},
{ch, 3},
{[]int{}, 0},
{map[int]int{}, 0},
{make(chan int), 0},
{[]int(nil), 0},
{map[int]int(nil), 0},
{(chan int)(nil), 0},
}
for _, c := range cases {
assert.True(mockAssert.Len(c.v, c.l), "%#v have %d items", c.v, c.l)
}
}
func TestWithinDurationWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
a := time.Now()
b := a.Add(10 * time.Second)
assert.True(mockAssert.WithinDuration(a, b, 10*time.Second), "A 10s difference is within a 10s time difference")
assert.True(mockAssert.WithinDuration(b, a, 10*time.Second), "A 10s difference is within a 10s time difference")
assert.False(mockAssert.WithinDuration(a, b, 9*time.Second), "A 10s difference is not within a 9s time difference")
assert.False(mockAssert.WithinDuration(b, a, 9*time.Second), "A 10s difference is not within a 9s time difference")
assert.False(mockAssert.WithinDuration(a, b, -9*time.Second), "A 10s difference is not within a 9s time difference")
assert.False(mockAssert.WithinDuration(b, a, -9*time.Second), "A 10s difference is not within a 9s time difference")
assert.False(mockAssert.WithinDuration(a, b, -11*time.Second), "A 10s difference is not within a 9s time difference")
assert.False(mockAssert.WithinDuration(b, a, -11*time.Second), "A 10s difference is not within a 9s time difference")
}
func TestInDeltaWrapper(t *testing.T) {
assert := New(new(testing.T))
True(t, assert.InDelta(1.001, 1, 0.01), "|1.001 - 1| <= 0.01")
True(t, assert.InDelta(1, 1.001, 0.01), "|1 - 1.001| <= 0.01")
True(t, assert.InDelta(1, 2, 1), "|1 - 2| <= 1")
False(t, assert.InDelta(1, 2, 0.5), "Expected |1 - 2| <= 0.5 to fail")
False(t, assert.InDelta(2, 1, 0.5), "Expected |2 - 1| <= 0.5 to fail")
False(t, assert.InDelta("", nil, 1), "Expected non numerals to fail")
cases := []struct {
a, b interface{}
delta float64
}{
{uint8(2), uint8(1), 1},
{uint16(2), uint16(1), 1},
{uint32(2), uint32(1), 1},
{uint64(2), uint64(1), 1},
{int(2), int(1), 1},
{int8(2), int8(1), 1},
{int16(2), int16(1), 1},
{int32(2), int32(1), 1},
{int64(2), int64(1), 1},
{float32(2), float32(1), 1},
{float64(2), float64(1), 1},
}
for _, tc := range cases {
True(t, assert.InDelta(tc.a, tc.b, tc.delta), "Expected |%V - %V| <= %v", tc.a, tc.b, tc.delta)
}
}
func TestInEpsilonWrapper(t *testing.T) {
assert := New(new(testing.T))
cases := []struct {
a, b interface{}
epsilon float64
}{
{uint8(2), uint16(2), .001},
{2.1, 2.2, 0.1},
{2.2, 2.1, 0.1},
{-2.1, -2.2, 0.1},
{-2.2, -2.1, 0.1},
{uint64(100), uint8(101), 0.01},
{0.1, -0.1, 2},
}
for _, tc := range cases {
True(t, assert.InEpsilon(tc.a, tc.b, tc.epsilon, "Expected %V and %V to have a relative difference of %v", tc.a, tc.b, tc.epsilon))
}
cases = []struct {
a, b interface{}
epsilon float64
}{
{uint8(2), int16(-2), .001},
{uint64(100), uint8(102), 0.01},
{2.1, 2.2, 0.001},
{2.2, 2.1, 0.001},
{2.1, -2.2, 1},
{2.1, "bla-bla", 0},
{0.1, -0.1, 1.99},
}
for _, tc := range cases {
False(t, assert.InEpsilon(tc.a, tc.b, tc.epsilon, "Expected %V and %V to have a relative difference of %v", tc.a, tc.b, tc.epsilon))
}
}
func TestRegexpWrapper(t *testing.T) {
assert := New(new(testing.T))
cases := []struct {
rx, str string
}{
{"^start", "start of the line"},
{"end$", "in the end"},
{"[0-9]{3}[.-]?[0-9]{2}[.-]?[0-9]{2}", "My phone number is 650.12.34"},
}
for _, tc := range cases {
True(t, assert.Regexp(tc.rx, tc.str))
True(t, assert.Regexp(regexp.MustCompile(tc.rx), tc.str))
False(t, assert.NotRegexp(tc.rx, tc.str))
False(t, assert.NotRegexp(regexp.MustCompile(tc.rx), tc.str))
}
cases = []struct {
rx, str string
}{
{"^asdfastart", "Not the start of the line"},
{"end$", "in the end."},
{"[0-9]{3}[.-]?[0-9]{2}[.-]?[0-9]{2}", "My phone number is 650.12a.34"},
}
for _, tc := range cases {
False(t, assert.Regexp(tc.rx, tc.str), "Expected \"%s\" to not match \"%s\"", tc.rx, tc.str)
False(t, assert.Regexp(regexp.MustCompile(tc.rx), tc.str))
True(t, assert.NotRegexp(tc.rx, tc.str))
True(t, assert.NotRegexp(regexp.MustCompile(tc.rx), tc.str))
}
}
func TestZeroWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
for _, test := range zeros {
assert.True(mockAssert.Zero(test), "Zero should return true for %v", test)
}
for _, test := range nonZeros {
assert.False(mockAssert.Zero(test), "Zero should return false for %v", test)
}
}
func TestNotZeroWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
for _, test := range zeros {
assert.False(mockAssert.NotZero(test), "Zero should return true for %v", test)
}
for _, test := range nonZeros {
assert.True(mockAssert.NotZero(test), "Zero should return false for %v", test)
}
}
func TestJSONEqWrapper_EqualSONString(t *testing.T) {
assert := New(new(testing.T))
if !assert.JSONEq(`{"hello": "world", "foo": "bar"}`, `{"hello": "world", "foo": "bar"}`) {
t.Error("JSONEq should return true")
}
}
func TestJSONEqWrapper_EquivalentButNotEqual(t *testing.T) {
assert := New(new(testing.T))
if !assert.JSONEq(`{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`) {
t.Error("JSONEq should return true")
}
}
func TestJSONEqWrapper_HashOfArraysAndHashes(t *testing.T) {
assert := New(new(testing.T))
if !assert.JSONEq("{\r\n\t\"numeric\": 1.5,\r\n\t\"array\": [{\"foo\": \"bar\"}, 1, \"string\", [\"nested\", \"array\", 5.5]],\r\n\t\"hash\": {\"nested\": \"hash\", \"nested_slice\": [\"this\", \"is\", \"nested\"]},\r\n\t\"string\": \"foo\"\r\n}",
"{\r\n\t\"numeric\": 1.5,\r\n\t\"hash\": {\"nested\": \"hash\", \"nested_slice\": [\"this\", \"is\", \"nested\"]},\r\n\t\"string\": \"foo\",\r\n\t\"array\": [{\"foo\": \"bar\"}, 1, \"string\", [\"nested\", \"array\", 5.5]]\r\n}") {
t.Error("JSONEq should return true")
}
}
func TestJSONEqWrapper_Array(t *testing.T) {
assert := New(new(testing.T))
if !assert.JSONEq(`["foo", {"hello": "world", "nested": "hash"}]`, `["foo", {"nested": "hash", "hello": "world"}]`) {
t.Error("JSONEq should return true")
}
}
func TestJSONEqWrapper_HashAndArrayNotEquivalent(t *testing.T) {
assert := New(new(testing.T))
if assert.JSONEq(`["foo", {"hello": "world", "nested": "hash"}]`, `{"foo": "bar", {"nested": "hash", "hello": "world"}}`) {
t.Error("JSONEq should return false")
}
}
func TestJSONEqWrapper_HashesNotEquivalent(t *testing.T) {
assert := New(new(testing.T))
if assert.JSONEq(`{"foo": "bar"}`, `{"foo": "bar", "hello": "world"}`) {
t.Error("JSONEq should return false")
}
}
func TestJSONEqWrapper_ActualIsNotJSON(t *testing.T) {
assert := New(new(testing.T))
if assert.JSONEq(`{"foo": "bar"}`, "Not JSON") {
t.Error("JSONEq should return false")
}
}
func TestJSONEqWrapper_ExpectedIsNotJSON(t *testing.T) {
assert := New(new(testing.T))
if assert.JSONEq("Not JSON", `{"foo": "bar", "hello": "world"}`) {
t.Error("JSONEq should return false")
}
}
func TestJSONEqWrapper_ExpectedAndActualNotJSON(t *testing.T) {
assert := New(new(testing.T))
if assert.JSONEq("Not JSON", "Not JSON") {
t.Error("JSONEq should return false")
}
}
func TestJSONEqWrapper_ArraysOfDifferentOrder(t *testing.T) {
assert := New(new(testing.T))
if assert.JSONEq(`["foo", {"hello": "world", "nested": "hash"}]`, `[{ "hello": "world", "nested": "hash"}, "foo"]`) {
t.Error("JSONEq should return false")
}
}

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package assert
import (
"fmt"
"net/http"
"net/http/httptest"
"net/url"
"strings"
)
// httpCode is a helper that returns HTTP code of the response. It returns -1 and
// an error if building a new request fails.
func httpCode(handler http.HandlerFunc, method, url string, values url.Values) (int, error) {
w := httptest.NewRecorder()
req, err := http.NewRequest(method, url+"?"+values.Encode(), nil)
if err != nil {
return -1, err
}
handler(w, req)
return w.Code, nil
}
// HTTPSuccess asserts that a specified handler returns a success status code.
//
// assert.HTTPSuccess(t, myHandler, "POST", "http://www.google.com", nil)
//
// Returns whether the assertion was successful (true) or not (false).
func HTTPSuccess(t TestingT, handler http.HandlerFunc, method, url string, values url.Values) bool {
code, err := httpCode(handler, method, url, values)
if err != nil {
Fail(t, fmt.Sprintf("Failed to build test request, got error: %s", err))
return false
}
isSuccessCode := code >= http.StatusOK && code <= http.StatusPartialContent
if !isSuccessCode {
Fail(t, fmt.Sprintf("Expected HTTP success status code for %q but received %d", url+"?"+values.Encode(), code))
}
return isSuccessCode
}
// HTTPRedirect asserts that a specified handler returns a redirect status code.
//
// assert.HTTPRedirect(t, myHandler, "GET", "/a/b/c", url.Values{"a": []string{"b", "c"}}
//
// Returns whether the assertion was successful (true) or not (false).
func HTTPRedirect(t TestingT, handler http.HandlerFunc, method, url string, values url.Values) bool {
code, err := httpCode(handler, method, url, values)
if err != nil {
Fail(t, fmt.Sprintf("Failed to build test request, got error: %s", err))
return false
}
isRedirectCode := code >= http.StatusMultipleChoices && code <= http.StatusTemporaryRedirect
if !isRedirectCode {
Fail(t, fmt.Sprintf("Expected HTTP redirect status code for %q but received %d", url+"?"+values.Encode(), code))
}
return isRedirectCode
}
// HTTPError asserts that a specified handler returns an error status code.
//
// assert.HTTPError(t, myHandler, "POST", "/a/b/c", url.Values{"a": []string{"b", "c"}}
//
// Returns whether the assertion was successful (true) or not (false).
func HTTPError(t TestingT, handler http.HandlerFunc, method, url string, values url.Values) bool {
code, err := httpCode(handler, method, url, values)
if err != nil {
Fail(t, fmt.Sprintf("Failed to build test request, got error: %s", err))
return false
}
isErrorCode := code >= http.StatusBadRequest
if !isErrorCode {
Fail(t, fmt.Sprintf("Expected HTTP error status code for %q but received %d", url+"?"+values.Encode(), code))
}
return isErrorCode
}
// HTTPBody is a helper that returns HTTP body of the response. It returns
// empty string if building a new request fails.
func HTTPBody(handler http.HandlerFunc, method, url string, values url.Values) string {
w := httptest.NewRecorder()
req, err := http.NewRequest(method, url+"?"+values.Encode(), nil)
if err != nil {
return ""
}
handler(w, req)
return w.Body.String()
}
// HTTPBodyContains asserts that a specified handler returns a
// body that contains a string.
//
// assert.HTTPBodyContains(t, myHandler, "www.google.com", nil, "I'm Feeling Lucky")
//
// Returns whether the assertion was successful (true) or not (false).
func HTTPBodyContains(t TestingT, handler http.HandlerFunc, method, url string, values url.Values, str interface{}) bool {
body := HTTPBody(handler, method, url, values)
contains := strings.Contains(body, fmt.Sprint(str))
if !contains {
Fail(t, fmt.Sprintf("Expected response body for \"%s\" to contain \"%s\" but found \"%s\"", url+"?"+values.Encode(), str, body))
}
return contains
}
// HTTPBodyNotContains asserts that a specified handler returns a
// body that does not contain a string.
//
// assert.HTTPBodyNotContains(t, myHandler, "www.google.com", nil, "I'm Feeling Lucky")
//
// Returns whether the assertion was successful (true) or not (false).
func HTTPBodyNotContains(t TestingT, handler http.HandlerFunc, method, url string, values url.Values, str interface{}) bool {
body := HTTPBody(handler, method, url, values)
contains := strings.Contains(body, fmt.Sprint(str))
if contains {
Fail(t, fmt.Sprintf("Expected response body for \"%s\" to NOT contain \"%s\" but found \"%s\"", url+"?"+values.Encode(), str, body))
}
return !contains
}

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package assert
import (
"fmt"
"net/http"
"net/url"
"testing"
)
func httpOK(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
}
func httpRedirect(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusTemporaryRedirect)
}
func httpError(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusInternalServerError)
}
func TestHTTPSuccess(t *testing.T) {
assert := New(t)
mockT1 := new(testing.T)
assert.Equal(HTTPSuccess(mockT1, httpOK, "GET", "/", nil), true)
assert.False(mockT1.Failed())
mockT2 := new(testing.T)
assert.Equal(HTTPSuccess(mockT2, httpRedirect, "GET", "/", nil), false)
assert.True(mockT2.Failed())
mockT3 := new(testing.T)
assert.Equal(HTTPSuccess(mockT3, httpError, "GET", "/", nil), false)
assert.True(mockT3.Failed())
}
func TestHTTPRedirect(t *testing.T) {
assert := New(t)
mockT1 := new(testing.T)
assert.Equal(HTTPRedirect(mockT1, httpOK, "GET", "/", nil), false)
assert.True(mockT1.Failed())
mockT2 := new(testing.T)
assert.Equal(HTTPRedirect(mockT2, httpRedirect, "GET", "/", nil), true)
assert.False(mockT2.Failed())
mockT3 := new(testing.T)
assert.Equal(HTTPRedirect(mockT3, httpError, "GET", "/", nil), false)
assert.True(mockT3.Failed())
}
func TestHTTPError(t *testing.T) {
assert := New(t)
mockT1 := new(testing.T)
assert.Equal(HTTPError(mockT1, httpOK, "GET", "/", nil), false)
assert.True(mockT1.Failed())
mockT2 := new(testing.T)
assert.Equal(HTTPError(mockT2, httpRedirect, "GET", "/", nil), false)
assert.True(mockT2.Failed())
mockT3 := new(testing.T)
assert.Equal(HTTPError(mockT3, httpError, "GET", "/", nil), true)
assert.False(mockT3.Failed())
}
func TestHTTPStatusesWrapper(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
assert.Equal(mockAssert.HTTPSuccess(httpOK, "GET", "/", nil), true)
assert.Equal(mockAssert.HTTPSuccess(httpRedirect, "GET", "/", nil), false)
assert.Equal(mockAssert.HTTPSuccess(httpError, "GET", "/", nil), false)
assert.Equal(mockAssert.HTTPRedirect(httpOK, "GET", "/", nil), false)
assert.Equal(mockAssert.HTTPRedirect(httpRedirect, "GET", "/", nil), true)
assert.Equal(mockAssert.HTTPRedirect(httpError, "GET", "/", nil), false)
assert.Equal(mockAssert.HTTPError(httpOK, "GET", "/", nil), false)
assert.Equal(mockAssert.HTTPError(httpRedirect, "GET", "/", nil), false)
assert.Equal(mockAssert.HTTPError(httpError, "GET", "/", nil), true)
}
func httpHelloName(w http.ResponseWriter, r *http.Request) {
name := r.FormValue("name")
w.Write([]byte(fmt.Sprintf("Hello, %s!", name)))
}
func TestHttpBody(t *testing.T) {
assert := New(t)
mockT := new(testing.T)
assert.True(HTTPBodyContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "Hello, World!"))
assert.True(HTTPBodyContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "World"))
assert.False(HTTPBodyContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "world"))
assert.False(HTTPBodyNotContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "Hello, World!"))
assert.False(HTTPBodyNotContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "World"))
assert.True(HTTPBodyNotContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "world"))
}
func TestHttpBodyWrappers(t *testing.T) {
assert := New(t)
mockAssert := New(new(testing.T))
assert.True(mockAssert.HTTPBodyContains(httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "Hello, World!"))
assert.True(mockAssert.HTTPBodyContains(httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "World"))
assert.False(mockAssert.HTTPBodyContains(httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "world"))
assert.False(mockAssert.HTTPBodyNotContains(httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "Hello, World!"))
assert.False(mockAssert.HTTPBodyNotContains(httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "World"))
assert.True(mockAssert.HTTPBodyNotContains(httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "world"))
}