-Fixed reading NaN, Infinity, -Infinity with ReadAsDouble and ReadAsString

Src/Newtonsoft.Json.Tests/JsonTextReaderTest.cs

@@ -61,6 +61,95 @@ namespace Newtonsoft.Json.Tests
     [TestFixture]
     public class JsonTextReaderTest : TestFixtureBase
     {
+        [Test]
+        public void Float_NaN_Read()
+        {
+            const string testJson = "{float: NaN}";
+
+            JsonTextReader reader = new JsonTextReader(new StringReader(testJson));
+
+            Assert.IsTrue(reader.Read());
+            Assert.IsTrue(reader.Read());
+            Assert.IsTrue(reader.Read());
+
+            Assert.AreEqual(JsonToken.Float, reader.TokenType);
+            Assert.AreEqual(double.NaN, reader.Value);
+
+            Assert.IsTrue(reader.Read());
+            Assert.IsFalse(reader.Read());
+        }
+
+        [Test]
+        public void Float_NaN_ReadAsInt32()
+        {
+            const string testJson = "{float: NaN}";
+
+            JsonTextReader reader = new JsonTextReader(new StringReader(testJson));
+
+            Assert.IsTrue(reader.Read());
+            Assert.IsTrue(reader.Read());
+
+            ExceptionAssert.Throws<JsonReaderException>(() => reader.ReadAsInt32(), "Cannot read NaN value. Path 'float', line 1, position 11.");
+        }
+
+        [Test]
+        public void Float_NaNAndInifinity_ReadAsDouble()
+        {
+            const string testJson = @"[
+  NaN,
+  Infinity,
+  -Infinity
+]"; ;
+
+            JsonTextReader reader = new JsonTextReader(new StringReader(testJson));
+
+            Assert.IsTrue(reader.Read());
+
+            Assert.AreEqual(double.NaN, reader.ReadAsDouble());
+            Assert.AreEqual(JsonToken.Float, reader.TokenType);
+            Assert.AreEqual(double.NaN, reader.Value);
+
+            Assert.AreEqual(double.PositiveInfinity, reader.ReadAsDouble());
+            Assert.AreEqual(JsonToken.Float, reader.TokenType);
+            Assert.AreEqual(double.PositiveInfinity, reader.Value);
+
+            Assert.AreEqual(double.NegativeInfinity, reader.ReadAsDouble());
+            Assert.AreEqual(JsonToken.Float, reader.TokenType);
+            Assert.AreEqual(double.NegativeInfinity, reader.Value);
+
+            Assert.IsTrue(reader.Read());
+            Assert.IsFalse(reader.Read());
+        }
+
+        [Test]
+        public void Float_NaNAndInifinity_ReadAsString()
+        {
+            const string testJson = @"[
+  NaN,
+  Infinity,
+  -Infinity
+]"; ;
+
+            JsonTextReader reader = new JsonTextReader(new StringReader(testJson));
+
+            Assert.IsTrue(reader.Read());
+
+            Assert.AreEqual(JsonConvert.NaN, reader.ReadAsString());
+            Assert.AreEqual(JsonToken.String, reader.TokenType);
+            Assert.AreEqual(JsonConvert.NaN, reader.Value);
+
+            Assert.AreEqual(JsonConvert.PositiveInfinity, reader.ReadAsString());
+            Assert.AreEqual(JsonToken.String, reader.TokenType);
+            Assert.AreEqual(JsonConvert.PositiveInfinity, reader.Value);
+
+            Assert.AreEqual(JsonConvert.NegativeInfinity, reader.ReadAsString());
+            Assert.AreEqual(JsonToken.String, reader.TokenType);
+            Assert.AreEqual(JsonConvert.NegativeInfinity, reader.Value);
+
+            Assert.IsTrue(reader.Read());
+            Assert.IsFalse(reader.Read());
+        }
+
         [Test]
         public void FloatParseHandling_ReadAsString()
         {
@@ -486,7 +575,7 @@ third line", jsonTextReader.Value);
             Assert.IsTrue(reader.Read());
             Assert.AreEqual(JsonToken.StartArray, reader.TokenType);
 
-            ExceptionAssert.Throws<JsonReaderException>(() => reader.Read(), "Cannot read NaN as a decimal.");
+            ExceptionAssert.Throws<JsonReaderException>(() => reader.Read(), "Cannot read NaN value. Path '', line 1, position 4.");
         }
 
         [Test]