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DoublePrecision: add a unit test for the precision handling

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This commit is contained in:
Philipp A. Hartmann 2014-04-01 16:49:24 +02:00
parent c9c2d06b9b
commit 5474bc2f3d
1 changed files with 56 additions and 0 deletions
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56
test/unittest/writertest.cpp
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@ -1,4 +1,5 @@
#include "unittest.h"
#include "rapidjson/document.h"
#include "rapidjson/reader.h"
#include "rapidjson/writer.h"
#include "rapidjson/stringbuffer.h"
@ -56,6 +57,61 @@ TEST(Writer, String) {
TEST_ROUNDTRIP("[\"\\\"\\\\/\\b\\f\\n\\r\\t\"]");
}
TEST(Writer,DoublePrecision) {
const char json[] = "[1.2345,1.2345678,0.123456789012,1234567.8]";
StringBuffer buffer;
Writer<StringBuffer> writer(buffer);
const int kDefaultDoublePrecision = 6;
// handling the double precision
EXPECT_EQ(writer.GetDoublePrecision(), kDefaultDoublePrecision);
writer.SetDoublePrecision(17);
EXPECT_EQ(writer.GetDoublePrecision(), 17);
writer.SetDoublePrecision(-1); // negative equivalent to reset
EXPECT_EQ(writer.GetDoublePrecision(), kDefaultDoublePrecision);
writer.SetDoublePrecision(1);
writer.SetDoublePrecision(); // reset again
EXPECT_EQ(writer.GetDoublePrecision(), kDefaultDoublePrecision);
{ // write with explicitly increased precision
StringStream s(json);
Reader reader;
reader.Parse<0>(s, writer.SetDoublePrecision(12));
EXPECT_EQ(writer.GetDoublePrecision(), 12);
EXPECT_STREQ(json, buffer.GetString());
buffer.Clear();
}
{ // explicit individual double precisions
writer.SetDoublePrecision(2)
.StartArray()
.Double(1.2345,5)
.Double(1.2345678,9)
.Double(0.123456789012,12)
.Double(1234567.8,8)
.EndArray();
EXPECT_EQ(writer.GetDoublePrecision(), 2);
EXPECT_STREQ(json, buffer.GetString());
buffer.Clear();
}
{ // write with default precision (output with precision loss)
Document d;
d.Parse<0>(json);
d.Accept(writer.SetDoublePrecision());
// parsed again to avoid platform-dependent floating point outputs
// (e.g. width of exponents)
d.Parse<0>(buffer.GetString());
EXPECT_EQ(writer.GetDoublePrecision(), kDefaultDoublePrecision);
EXPECT_DOUBLE_EQ(d[0u].GetDouble(), 1.2345);
EXPECT_DOUBLE_EQ(d[1u].GetDouble(), 1.23457);
EXPECT_DOUBLE_EQ(d[2u].GetDouble(), 0.123457);
EXPECT_DOUBLE_EQ(d[3u].GetDouble(), 1234570);
buffer.Clear();
}
}
TEST(Writer, Transcode) {
// UTF8 -> UTF16 -> UTF8
StringStream s("{ \"hello\" : \"world\", \"t\" : true , \"f\" : false, \"n\": null, \"i\":123, \"pi\": 3.1416, \"a\":[1, 2, 3], \"dollar\":\"\x24\", \"cents\":\"\xC2\xA2\", \"euro\":\"\xE2\x82\xAC\", \"gclef\":\"\xF0\x9D\x84\x9E\" } ");