From b4a6da3e634c2327eeeb1287a48bc9b6e1e1858c Mon Sep 17 00:00:00 2001
From: Jeroen Doggen <jeroendoggen@gmail.com>
Date: Thu, 21 Sep 2023 08:53:27 +0200
Subject: [PATCH] unit tests for 'Stringify NaN, Inf as null'

---
 test/unittest/writertest.cpp | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/test/unittest/writertest.cpp b/test/unittest/writertest.cpp
index ac9ad89..4c24121 100644
--- a/test/unittest/writertest.cpp
+++ b/test/unittest/writertest.cpp
@@ -500,6 +500,18 @@ TEST(Writer, NaN) {
     EXPECT_FALSE(writer2.Double(nan));
 }
 
+TEST(Writer, NaNToNull) {
+    double nan = std::numeric_limits<double>::quiet_NaN();
+
+    EXPECT_TRUE(internal::Double(nan).IsNan());
+    {
+        StringBuffer buffer;
+        Writer<StringBuffer, UTF8<>, UTF8<>, CrtAllocator, kWriteNanAndInfNullFlag> writer(buffer);
+        EXPECT_TRUE(writer.Double(nan));
+        EXPECT_STREQ("null", buffer.GetString());
+    }
+}
+
 TEST(Writer, Inf) {
     double inf = std::numeric_limits<double>::infinity();
 
@@ -524,6 +536,24 @@ TEST(Writer, Inf) {
     EXPECT_STREQ("Infinity-Infinity", buffer.GetString());
 }
 
+TEST(Writer, InfToNull) {
+    double inf = std::numeric_limits<double>::infinity();
+
+    EXPECT_TRUE(internal::Double(inf).IsInf());
+    {
+        StringBuffer buffer;
+        Writer<StringBuffer, UTF8<>, UTF8<>, CrtAllocator, kWriteNanAndInfNullFlag> writer(buffer);
+        EXPECT_TRUE(writer.Double(inf));
+        EXPECT_STREQ("null", buffer.GetString());
+    }
+    {
+        StringBuffer buffer;
+        Writer<StringBuffer, UTF8<>, UTF8<>, CrtAllocator, kWriteNanAndInfNullFlag> writer(buffer);
+        EXPECT_TRUE(writer.Double(-inf));
+        EXPECT_STREQ("null", buffer.GetString());
+    }
+}
+
 TEST(Writer, RawValue) {
     StringBuffer buffer;
     Writer<StringBuffer> writer(buffer);