#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.IO;
using Newtonsoft.Json.Schema;
#if !(NET20 || NET35 || PORTABLE40 || PORTABLE) || NETSTANDARD1_3 || NETSTANDARD2_0
using System.Numerics;
#endif
using System.Runtime.Serialization;
using System.Text;
#if !(NET20 || NET35)
using System.Threading.Tasks;
#endif
using System.Xml;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json.Serialization;
using Newtonsoft.Json.Tests.Serialization;
using Newtonsoft.Json.Tests.TestObjects;
using Newtonsoft.Json.Tests.TestObjects.Organization;
using Newtonsoft.Json.Utilities;
#if DNXCORE50
using Xunit;
using Test = Xunit.FactAttribute;
using Assert = Newtonsoft.Json.Tests.XUnitAssert;
#else
using NUnit.Framework;

#endif

namespace Newtonsoft.Json.Tests
{
    [TestFixture]
    public class JsonConvertTest : TestFixtureBase
    {
        [Test]
        public void ToStringEnsureEscapedArrayLength()
        {
            const char nonAsciiChar = (char)257;
            const char escapableNonQuoteAsciiChar = '\0';

            string value = nonAsciiChar + @"\" + escapableNonQuoteAsciiChar;

            string convertedValue = JsonConvert.ToString((object)value);
            Assert.AreEqual(@"""" + nonAsciiChar + @"\\\u0000""", convertedValue);
        }

        public class PopulateTestObject
        {
            public decimal Prop { get; set; }
        }

        [Test]
        public void PopulateObjectWithHeaderComment()
        {
            string json = @"// file header
{
  ""prop"": 1.0
}";

            PopulateTestObject o = new PopulateTestObject();
            JsonConvert.PopulateObject(json, o);

            Assert.AreEqual(1m, o.Prop);
        }

        [Test]
        public void PopulateObjectWithMultipleHeaderComment()
        {
            string json = @"// file header
// another file header?
{
  ""prop"": 1.0
}";

            PopulateTestObject o = new PopulateTestObject();
            JsonConvert.PopulateObject(json, o);

            Assert.AreEqual(1m, o.Prop);
        }

        [Test]
        public void PopulateObjectWithNoContent()
        {
            ExceptionAssert.Throws<JsonSerializationException>(() =>
            {
                string json = @"";

                PopulateTestObject o = new PopulateTestObject();
                JsonConvert.PopulateObject(json, o);
            }, "No JSON content found. Path '', line 0, position 0.");
        }

        [Test]
        public void PopulateObjectWithOnlyComment()
        {
            var ex = ExceptionAssert.Throws<JsonSerializationException>(() =>
            {
                string json = @"// file header";

                PopulateTestObject o = new PopulateTestObject();
                JsonConvert.PopulateObject(json, o);
            }, "No JSON content found. Path '', line 1, position 14.");

            Assert.AreEqual(1, ex.LineNumber);
            Assert.AreEqual(14, ex.LinePosition);
            Assert.AreEqual(string.Empty, ex.Path);
        }

        [Test]
        public void DefaultSettings()
        {
            try
            {
                JsonConvert.DefaultSettings = () => new JsonSerializerSettings
                {
                    Formatting = Formatting.Indented
                };

                string json = JsonConvert.SerializeObject(new { test = new[] { 1, 2, 3 } });

                StringAssert.AreEqual(@"{
  ""test"": [
    1,
    2,
    3
  ]
}", json);
            }
            finally
            {
                JsonConvert.DefaultSettings = null;
            }
        }

        public class NameTableTestClass
        {
            public string Value { get; set; }
        }

        public class NameTableTestClassConverter : JsonConverter
        {
            public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
            {
                throw new NotImplementedException();
            }

            public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
            {
                reader.Read();
                reader.Read();

                JsonTextReader jsonTextReader = (JsonTextReader)reader;
                Assert.IsNotNull(jsonTextReader.PropertyNameTable);

                string s = serializer.Deserialize<string>(reader);
                Assert.AreEqual("hi", s);
                Assert.IsNotNull(jsonTextReader.PropertyNameTable);

                NameTableTestClass o = new NameTableTestClass
                {
                    Value = s
                };

                return o;
            }

            public override bool CanConvert(Type objectType)
            {
                return objectType == typeof(NameTableTestClass);
            }
        }

        [Test]
        public void NameTableTest()
        {
            StringReader sr = new StringReader("{'property':'hi'}");
            JsonTextReader jsonTextReader = new JsonTextReader(sr);

            Assert.IsNull(jsonTextReader.PropertyNameTable);

            JsonSerializer serializer = new JsonSerializer();
            serializer.Converters.Add(new NameTableTestClassConverter());
            NameTableTestClass o = serializer.Deserialize<NameTableTestClass>(jsonTextReader);

            Assert.IsNull(jsonTextReader.PropertyNameTable);
            Assert.AreEqual("hi", o.Value);
        }

        public class CustonNameTable : JsonNameTable
        {
            public override string Get(char[] key, int start, int length)
            {
                return "_" + new string(key, start, length);
            }
        }

        [Test]
        public void CustonNameTableTest()
        {
            StringReader sr = new StringReader("{'property':'hi'}");
            JsonTextReader jsonTextReader = new JsonTextReader(sr);

            Assert.IsNull(jsonTextReader.PropertyNameTable);
            var nameTable = jsonTextReader.PropertyNameTable = new CustonNameTable();

            JsonSerializer serializer = new JsonSerializer();
            Dictionary<string, string> o = serializer.Deserialize<Dictionary<string, string>>(jsonTextReader);
            Assert.AreEqual("hi", o["_property"]);

            Assert.AreEqual(nameTable, jsonTextReader.PropertyNameTable);
        }

        [Test]
        public void DefaultSettings_Example()
        {
            try
            {
                JsonConvert.DefaultSettings = () => new JsonSerializerSettings
                {
                    Formatting = Formatting.Indented,
                    ContractResolver = new CamelCasePropertyNamesContractResolver()
                };

                Employee e = new Employee
                {
                    FirstName = "Eric",
                    LastName = "Example",
                    BirthDate = new DateTime(1980, 4, 20, 0, 0, 0, DateTimeKind.Utc),
                    Department = "IT",
                    JobTitle = "Web Dude"
                };

                string json = JsonConvert.SerializeObject(e);
                // {
                //   "firstName": "Eric",
                //   "lastName": "Example",
                //   "birthDate": "1980-04-20T00:00:00Z",
                //   "department": "IT",
                //   "jobTitle": "Web Dude"
                // }

                StringAssert.AreEqual(@"{
  ""firstName"": ""Eric"",
  ""lastName"": ""Example"",
  ""birthDate"": ""1980-04-20T00:00:00Z"",
  ""department"": ""IT"",
  ""jobTitle"": ""Web Dude""
}", json);
            }
            finally
            {
                JsonConvert.DefaultSettings = null;
            }
        }

        [Test]
        public void DefaultSettings_Override()
        {
            try
            {
                JsonConvert.DefaultSettings = () => new JsonSerializerSettings
                {
                    Formatting = Formatting.Indented
                };

                string json = JsonConvert.SerializeObject(new { test = new[] { 1, 2, 3 } }, new JsonSerializerSettings
                {
                    Formatting = Formatting.None
                });

                Assert.AreEqual(@"{""test"":[1,2,3]}", json);
            }
            finally
            {
                JsonConvert.DefaultSettings = null;
            }
        }

        [Test]
        public void DefaultSettings_Override_JsonConverterOrder()
        {
            try
            {
                JsonConvert.DefaultSettings = () => new JsonSerializerSettings
                {
                    Formatting = Formatting.Indented,
                    Converters = { new IsoDateTimeConverter { DateTimeFormat = "yyyy" } }
                };

                string json = JsonConvert.SerializeObject(new[] { new DateTime(2000, 12, 12, 4, 2, 4, DateTimeKind.Utc) }, new JsonSerializerSettings
                {
                    Formatting = Formatting.None,
                    Converters =
                    {
                        // should take precedence
                        new JavaScriptDateTimeConverter(),
                        new IsoDateTimeConverter { DateTimeFormat = "dd" }
                    }
                });

                Assert.AreEqual(@"[new Date(976593724000)]", json);
            }
            finally
            {
                JsonConvert.DefaultSettings = null;
            }
        }

        [Test]
        public void DefaultSettings_Create()
        {
            try
            {
                JsonConvert.DefaultSettings = () => new JsonSerializerSettings
                {
                    Formatting = Formatting.Indented
                };

                IList<int> l = new List<int> { 1, 2, 3 };

                StringWriter sw = new StringWriter();
                JsonSerializer serializer = JsonSerializer.CreateDefault();
                serializer.Serialize(sw, l);

                StringAssert.AreEqual(@"[
  1,
  2,
  3
]", sw.ToString());

                sw = new StringWriter();
                serializer.Formatting = Formatting.None;
                serializer.Serialize(sw, l);

                Assert.AreEqual(@"[1,2,3]", sw.ToString());

                sw = new StringWriter();
                serializer = new JsonSerializer();
                serializer.Serialize(sw, l);

                Assert.AreEqual(@"[1,2,3]", sw.ToString());

                sw = new StringWriter();
                serializer = JsonSerializer.Create();
                serializer.Serialize(sw, l);

                Assert.AreEqual(@"[1,2,3]", sw.ToString());
            }
            finally
            {
                JsonConvert.DefaultSettings = null;
            }
        }

        [Test]
        public void DefaultSettings_CreateWithSettings()
        {
            try
            {
                JsonConvert.DefaultSettings = () => new JsonSerializerSettings
                {
                    Formatting = Formatting.Indented
                };

                IList<int> l = new List<int> { 1, 2, 3 };

                StringWriter sw = new StringWriter();
                JsonSerializer serializer = JsonSerializer.CreateDefault(new JsonSerializerSettings
                {
                    Converters = { new IntConverter() }
                });
                serializer.Serialize(sw, l);

                StringAssert.AreEqual(@"[
  2,
  4,
  6
]", sw.ToString());

                sw = new StringWriter();
                serializer.Converters.Clear();
                serializer.Serialize(sw, l);

                StringAssert.AreEqual(@"[
  1,
  2,
  3
]", sw.ToString());

                sw = new StringWriter();
                serializer = JsonSerializer.Create(new JsonSerializerSettings { Formatting = Formatting.Indented });
                serializer.Serialize(sw, l);

                StringAssert.AreEqual(@"[
  1,
  2,
  3
]", sw.ToString());
            }
            finally
            {
                JsonConvert.DefaultSettings = null;
            }
        }

        public class IntConverter : JsonConverter
        {
            public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
            {
                int i = (int)value;
                writer.WriteValue(i * 2);
            }

            public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
            {
                throw new NotImplementedException();
            }

            public override bool CanConvert(Type objectType)
            {
                return objectType == typeof(int);
            }
        }

        [Test]
        public void DeserializeObject_EmptyString()
        {
            object result = JsonConvert.DeserializeObject(string.Empty);
            Assert.IsNull(result);
        }

        [Test]
        public void DeserializeObject_Integer()
        {
            object result = JsonConvert.DeserializeObject("1");
            Assert.AreEqual(1L, result);
        }

        [Test]
        public void DeserializeObject_Integer_EmptyString()
        {
            int? value = JsonConvert.DeserializeObject<int?>("");
            Assert.IsNull(value);
        }

        [Test]
        public void DeserializeObject_Decimal_EmptyString()
        {
            decimal? value = JsonConvert.DeserializeObject<decimal?>("");
            Assert.IsNull(value);
        }

        [Test]
        public void DeserializeObject_DateTime_EmptyString()
        {
            DateTime? value = JsonConvert.DeserializeObject<DateTime?>("");
            Assert.IsNull(value);
        }

        [Test]
        public void EscapeJavaScriptString()
        {
            string result;

            result = JavaScriptUtils.ToEscapedJavaScriptString("How now brown cow?", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""How now brown cow?""", result);

            result = JavaScriptUtils.ToEscapedJavaScriptString("How now 'brown' cow?", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""How now 'brown' cow?""", result);

            result = JavaScriptUtils.ToEscapedJavaScriptString("How now <brown> cow?", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""How now <brown> cow?""", result);

            result = JavaScriptUtils.ToEscapedJavaScriptString("How \r\nnow brown cow?", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""How \r\nnow brown cow?""", result);

            result = JavaScriptUtils.ToEscapedJavaScriptString("\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007""", result);

            result =
                JavaScriptUtils.ToEscapedJavaScriptString("\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013""", result);

            result =
                JavaScriptUtils.ToEscapedJavaScriptString(
                    "\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f ", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f """, result);

            result =
                JavaScriptUtils.ToEscapedJavaScriptString(
                    "!\"#$%&\u0027()*+,-./0123456789:;\u003c=\u003e?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""!\""#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]""", result);

            result = JavaScriptUtils.ToEscapedJavaScriptString("^_`abcdefghijklmnopqrstuvwxyz{|}~", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""^_`abcdefghijklmnopqrstuvwxyz{|}~""", result);

            string data =
                "\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f !\"#$%&\u0027()*+,-./0123456789:;\u003c=\u003e?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";
            string expected =
                @"""\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f !\""#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~""";

            result = JavaScriptUtils.ToEscapedJavaScriptString(data, '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(expected, result);

            result = JavaScriptUtils.ToEscapedJavaScriptString("Fred's cat.", '\'', true, StringEscapeHandling.Default);
            Assert.AreEqual(result, @"'Fred\'s cat.'");

            result = JavaScriptUtils.ToEscapedJavaScriptString(@"""How are you gentlemen?"" said Cats.", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(result, @"""\""How are you gentlemen?\"" said Cats.""");

            result = JavaScriptUtils.ToEscapedJavaScriptString(@"""How are' you gentlemen?"" said Cats.", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(result, @"""\""How are' you gentlemen?\"" said Cats.""");

            result = JavaScriptUtils.ToEscapedJavaScriptString(@"Fred's ""cat"".", '\'', true, StringEscapeHandling.Default);
            Assert.AreEqual(result, @"'Fred\'s ""cat"".'");

            result = JavaScriptUtils.ToEscapedJavaScriptString("\u001farray\u003caddress", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(result, @"""\u001farray<address""");
        }

        [Test]
        public void EscapeJavaScriptString_UnicodeLinefeeds()
        {
            string result;

            result = JavaScriptUtils.ToEscapedJavaScriptString("before" + '\u0085' + "after", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""before\u0085after""", result);

            result = JavaScriptUtils.ToEscapedJavaScriptString("before" + '\u2028' + "after", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""before\u2028after""", result);

            result = JavaScriptUtils.ToEscapedJavaScriptString("before" + '\u2029' + "after", '"', true, StringEscapeHandling.Default);
            Assert.AreEqual(@"""before\u2029after""", result);
        }

        [Test]
        public void ToStringInvalid()
        {
            ExceptionAssert.Throws<ArgumentException>(() => { JsonConvert.ToString(new Version(1, 0)); }, "Unsupported type: System.Version. Use the JsonSerializer class to get the object's JSON representation.");
        }

        [Test]
        public void GuidToString()
        {
            Guid guid = new Guid("BED7F4EA-1A96-11d2-8F08-00A0C9A6186D");
            string json = JsonConvert.ToString(guid);
            Assert.AreEqual(@"""bed7f4ea-1a96-11d2-8f08-00a0c9a6186d""", json);
        }

        [Test]
        public void EnumToString()
        {
            string json = JsonConvert.ToString(StringComparison.CurrentCultureIgnoreCase);
            Assert.AreEqual("1", json);
        }

        [Test]
        public void ObjectToString()
        {
            object value;

            value = 1;
            Assert.AreEqual("1", JsonConvert.ToString(value));

            value = 1.1;
            Assert.AreEqual("1.1", JsonConvert.ToString(value));

            value = 1.1m;
            Assert.AreEqual("1.1", JsonConvert.ToString(value));

            value = (float)1.1;
            Assert.AreEqual("1.1", JsonConvert.ToString(value));

            value = (short)1;
            Assert.AreEqual("1", JsonConvert.ToString(value));

            value = (long)1;
            Assert.AreEqual("1", JsonConvert.ToString(value));

            value = (byte)1;
            Assert.AreEqual("1", JsonConvert.ToString(value));

            value = (uint)1;
            Assert.AreEqual("1", JsonConvert.ToString(value));

            value = (ushort)1;
            Assert.AreEqual("1", JsonConvert.ToString(value));

            value = (sbyte)1;
            Assert.AreEqual("1", JsonConvert.ToString(value));

            value = (ulong)1;
            Assert.AreEqual("1", JsonConvert.ToString(value));

            value = new DateTime(DateTimeUtils.InitialJavaScriptDateTicks, DateTimeKind.Utc);
            Assert.AreEqual(@"""1970-01-01T00:00:00Z""", JsonConvert.ToString(value));

            value = new DateTime(DateTimeUtils.InitialJavaScriptDateTicks, DateTimeKind.Utc);
            Assert.AreEqual(@"""\/Date(0)\/""", JsonConvert.ToString((DateTime)value, DateFormatHandling.MicrosoftDateFormat, DateTimeZoneHandling.RoundtripKind));

#if !NET20
            value = new DateTimeOffset(DateTimeUtils.InitialJavaScriptDateTicks, TimeSpan.Zero);
            Assert.AreEqual(@"""1970-01-01T00:00:00+00:00""", JsonConvert.ToString(value));

            value = new DateTimeOffset(DateTimeUtils.InitialJavaScriptDateTicks, TimeSpan.Zero);
            Assert.AreEqual(@"""\/Date(0+0000)\/""", JsonConvert.ToString((DateTimeOffset)value, DateFormatHandling.MicrosoftDateFormat));
#endif

            value = null;
            Assert.AreEqual("null", JsonConvert.ToString(value));

#if !(PORTABLE || DNXCORE50 || PORTABLE40)
            value = DBNull.Value;
            Assert.AreEqual("null", JsonConvert.ToString(value));
#endif

            value = "I am a string";
            Assert.AreEqual(@"""I am a string""", JsonConvert.ToString(value));

            value = true;
            Assert.AreEqual("true", JsonConvert.ToString(value));

            value = 'c';
            Assert.AreEqual(@"""c""", JsonConvert.ToString(value));
        }

        [Test]
        public void TestInvalidStrings()
        {
            ExceptionAssert.Throws<JsonReaderException>(() =>
            {
                string orig = @"this is a string ""that has quotes"" ";

                string serialized = JsonConvert.SerializeObject(orig);

                // *** Make string invalid by stripping \" \"
                serialized = serialized.Replace(@"\""", "\"");

                JsonConvert.DeserializeObject<string>(serialized);
            }, "Additional text encountered after finished reading JSON content: t. Path '', line 1, position 19.");
        }

        [Test]
        public void DeserializeValueObjects()
        {
            int i = JsonConvert.DeserializeObject<int>("1");
            Assert.AreEqual(1, i);

#if !NET20
            DateTimeOffset d = JsonConvert.DeserializeObject<DateTimeOffset>(@"""\/Date(-59011455539000+0000)\/""");
            Assert.AreEqual(new DateTimeOffset(new DateTime(100, 1, 1, 1, 1, 1, DateTimeKind.Utc)), d);
#endif

            bool b = JsonConvert.DeserializeObject<bool>("true");
            Assert.AreEqual(true, b);

            object n = JsonConvert.DeserializeObject<object>("null");
            Assert.AreEqual(null, n);

            object u = JsonConvert.DeserializeObject<object>("undefined");
            Assert.AreEqual(null, u);
        }

        [Test]
        public void FloatToString()
        {
            Assert.AreEqual("1.1", JsonConvert.ToString(1.1));
            Assert.AreEqual("1.11", JsonConvert.ToString(1.11));
            Assert.AreEqual("1.111", JsonConvert.ToString(1.111));
            Assert.AreEqual("1.1111", JsonConvert.ToString(1.1111));
            Assert.AreEqual("1.11111", JsonConvert.ToString(1.11111));
            Assert.AreEqual("1.111111", JsonConvert.ToString(1.111111));
            Assert.AreEqual("1.0", JsonConvert.ToString(1.0));
            Assert.AreEqual("1.0", JsonConvert.ToString(1d));
            Assert.AreEqual("-1.0", JsonConvert.ToString(-1d));
            Assert.AreEqual("1.01", JsonConvert.ToString(1.01));
            Assert.AreEqual("1.001", JsonConvert.ToString(1.001));
            Assert.AreEqual(JsonConvert.PositiveInfinity, JsonConvert.ToString(Double.PositiveInfinity));
            Assert.AreEqual(JsonConvert.NegativeInfinity, JsonConvert.ToString(Double.NegativeInfinity));
            Assert.AreEqual(JsonConvert.NaN, JsonConvert.ToString(Double.NaN));
        }

        [Test]
        public void DecimalToString()
        {
            Assert.AreEqual("1.1", JsonConvert.ToString(1.1m));
            Assert.AreEqual("1.11", JsonConvert.ToString(1.11m));
            Assert.AreEqual("1.111", JsonConvert.ToString(1.111m));
            Assert.AreEqual("1.1111", JsonConvert.ToString(1.1111m));
            Assert.AreEqual("1.11111", JsonConvert.ToString(1.11111m));
            Assert.AreEqual("1.111111", JsonConvert.ToString(1.111111m));
            Assert.AreEqual("1.0", JsonConvert.ToString(1.0m));
            Assert.AreEqual("-1.0", JsonConvert.ToString(-1.0m));
            Assert.AreEqual("-1.0", JsonConvert.ToString(-1m));
            Assert.AreEqual("1.0", JsonConvert.ToString(1m));
            Assert.AreEqual("1.01", JsonConvert.ToString(1.01m));
            Assert.AreEqual("1.001", JsonConvert.ToString(1.001m));
            Assert.AreEqual("79228162514264337593543950335.0", JsonConvert.ToString(Decimal.MaxValue));
            Assert.AreEqual("-79228162514264337593543950335.0", JsonConvert.ToString(Decimal.MinValue));
        }

        [Test]
        public void StringEscaping()
        {
            string v = "It's a good day\r\n\"sunshine\"";

            string json = JsonConvert.ToString(v);
            Assert.AreEqual(@"""It's a good day\r\n\""sunshine\""""", json);
        }

        [Test]
        public void ToStringStringEscapeHandling()
        {
            string v = "<b>hi " + '\u20AC' + "</b>";

            string json = JsonConvert.ToString(v, '"');
            Assert.AreEqual(@"""<b>hi " + '\u20AC' + @"</b>""", json);

            json = JsonConvert.ToString(v, '"', StringEscapeHandling.EscapeHtml);
            Assert.AreEqual(@"""\u003cb\u003ehi " + '\u20AC' + @"\u003c/b\u003e""", json);

            json = JsonConvert.ToString(v, '"', StringEscapeHandling.EscapeNonAscii);
            Assert.AreEqual(@"""<b>hi \u20ac</b>""", json);
        }

        [Test]
        public void WriteDateTime()
        {
            DateTimeResult result = null;

            result = TestDateTime("DateTime Max", DateTime.MaxValue);
            Assert.AreEqual("9999-12-31T23:59:59.9999999", result.IsoDateRoundtrip);
            Assert.AreEqual("9999-12-31T23:59:59.9999999" + GetOffset(DateTime.MaxValue, DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("9999-12-31T23:59:59.9999999", result.IsoDateUnspecified);
            Assert.AreEqual("9999-12-31T23:59:59.9999999Z", result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(253402300799999)\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(253402300799999" + GetOffset(DateTime.MaxValue, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(253402300799999)\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(253402300799999)\/", result.MsDateUtc);

            DateTime year2000local = new DateTime(2000, 1, 1, 1, 1, 1, DateTimeKind.Local);
            string localToUtcDate = year2000local.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.FFFFFFFK");

            result = TestDateTime("DateTime Local", year2000local);
            Assert.AreEqual("2000-01-01T01:01:01" + GetOffset(year2000local, DateFormatHandling.IsoDateFormat), result.IsoDateRoundtrip);
            Assert.AreEqual("2000-01-01T01:01:01" + GetOffset(year2000local, DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("2000-01-01T01:01:01", result.IsoDateUnspecified);
            Assert.AreEqual(localToUtcDate, result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(year2000local) + GetOffset(year2000local, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(year2000local) + GetOffset(year2000local, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(year2000local) + GetOffset(year2000local, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(year2000local) + @")\/", result.MsDateUtc);

            DateTime millisecondsLocal = new DateTime(2000, 1, 1, 1, 1, 1, 999, DateTimeKind.Local);
            localToUtcDate = millisecondsLocal.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.FFFFFFFK");

            result = TestDateTime("DateTime Local with milliseconds", millisecondsLocal);
            Assert.AreEqual("2000-01-01T01:01:01.999" + GetOffset(millisecondsLocal, DateFormatHandling.IsoDateFormat), result.IsoDateRoundtrip);
            Assert.AreEqual("2000-01-01T01:01:01.999" + GetOffset(millisecondsLocal, DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("2000-01-01T01:01:01.999", result.IsoDateUnspecified);
            Assert.AreEqual(localToUtcDate, result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(millisecondsLocal) + GetOffset(millisecondsLocal, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(millisecondsLocal) + GetOffset(millisecondsLocal, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(millisecondsLocal) + GetOffset(millisecondsLocal, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(millisecondsLocal) + @")\/", result.MsDateUtc);

            DateTime ticksLocal = new DateTime(636556897826822481, DateTimeKind.Local);
            localToUtcDate = ticksLocal.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.FFFFFFFK");

            result = TestDateTime("DateTime Local with ticks", ticksLocal);
            Assert.AreEqual("2018-03-03T16:03:02.6822481" + GetOffset(ticksLocal, DateFormatHandling.IsoDateFormat), result.IsoDateRoundtrip);
            Assert.AreEqual("2018-03-03T16:03:02.6822481" + GetOffset(ticksLocal, DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("2018-03-03T16:03:02.6822481", result.IsoDateUnspecified);
            Assert.AreEqual(localToUtcDate, result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(ticksLocal) + GetOffset(ticksLocal, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(ticksLocal) + GetOffset(ticksLocal, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(ticksLocal) + GetOffset(ticksLocal, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(ticksLocal) + @")\/", result.MsDateUtc);

            DateTime year2000Unspecified = new DateTime(2000, 1, 1, 1, 1, 1, DateTimeKind.Unspecified);

            result = TestDateTime("DateTime Unspecified", year2000Unspecified);
            Assert.AreEqual("2000-01-01T01:01:01", result.IsoDateRoundtrip);
            Assert.AreEqual("2000-01-01T01:01:01" + GetOffset(year2000Unspecified, DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("2000-01-01T01:01:01", result.IsoDateUnspecified);
            Assert.AreEqual("2000-01-01T01:01:01Z", result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(year2000Unspecified) + GetOffset(year2000Unspecified, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(year2000Unspecified) + GetOffset(year2000Unspecified, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(year2000Unspecified) + GetOffset(year2000Unspecified, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(year2000Unspecified.ToLocalTime()) + @")\/", result.MsDateUtc);

            DateTime year2000Utc = new DateTime(2000, 1, 1, 1, 1, 1, DateTimeKind.Utc);
            string utcTolocalDate = year2000Utc.ToLocalTime().ToString("yyyy-MM-ddTHH:mm:ss");

            result = TestDateTime("DateTime Utc", year2000Utc);
            Assert.AreEqual("2000-01-01T01:01:01Z", result.IsoDateRoundtrip);
            Assert.AreEqual(utcTolocalDate + GetOffset(year2000Utc, DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("2000-01-01T01:01:01", result.IsoDateUnspecified);
            Assert.AreEqual("2000-01-01T01:01:01Z", result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(946688461000)\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(946688461000" + GetOffset(year2000Utc, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(DateTime.SpecifyKind(year2000Utc, DateTimeKind.Unspecified)) + GetOffset(year2000Utc, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(946688461000)\/", result.MsDateUtc);

            DateTime unixEpoc = new DateTime(621355968000000000, DateTimeKind.Utc);
            utcTolocalDate = unixEpoc.ToLocalTime().ToString("yyyy-MM-ddTHH:mm:ss");

            result = TestDateTime("DateTime Unix Epoc", unixEpoc);
            Assert.AreEqual("1970-01-01T00:00:00Z", result.IsoDateRoundtrip);
            Assert.AreEqual(utcTolocalDate + GetOffset(unixEpoc, DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("1970-01-01T00:00:00", result.IsoDateUnspecified);
            Assert.AreEqual("1970-01-01T00:00:00Z", result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(0)\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(0" + GetOffset(unixEpoc, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(" + DateTimeUtils.ConvertDateTimeToJavaScriptTicks(DateTime.SpecifyKind(unixEpoc, DateTimeKind.Unspecified)) + GetOffset(unixEpoc, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(0)\/", result.MsDateUtc);

            result = TestDateTime("DateTime Min", DateTime.MinValue);
            Assert.AreEqual("0001-01-01T00:00:00", result.IsoDateRoundtrip);
            Assert.AreEqual("0001-01-01T00:00:00" + GetOffset(DateTime.MinValue, DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("0001-01-01T00:00:00", result.IsoDateUnspecified);
            Assert.AreEqual("0001-01-01T00:00:00Z", result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(-62135596800000)\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(-62135596800000" + GetOffset(DateTime.MinValue, DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(-62135596800000)\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(-62135596800000)\/", result.MsDateUtc);

            result = TestDateTime("DateTime Default", default(DateTime));
            Assert.AreEqual("0001-01-01T00:00:00", result.IsoDateRoundtrip);
            Assert.AreEqual("0001-01-01T00:00:00" + GetOffset(default(DateTime), DateFormatHandling.IsoDateFormat), result.IsoDateLocal);
            Assert.AreEqual("0001-01-01T00:00:00", result.IsoDateUnspecified);
            Assert.AreEqual("0001-01-01T00:00:00Z", result.IsoDateUtc);
            Assert.AreEqual(@"\/Date(-62135596800000)\/", result.MsDateRoundtrip);
            Assert.AreEqual(@"\/Date(-62135596800000" + GetOffset(default(DateTime), DateFormatHandling.MicrosoftDateFormat) + @")\/", result.MsDateLocal);
            Assert.AreEqual(@"\/Date(-62135596800000)\/", result.MsDateUnspecified);
            Assert.AreEqual(@"\/Date(-62135596800000)\/", result.MsDateUtc);

#if !NET20
            result = TestDateTime("DateTimeOffset TimeSpan Zero", new DateTimeOffset(2000, 1, 1, 1, 1, 1, TimeSpan.Zero));
            Assert.AreEqual("2000-01-01T01:01:01+00:00", result.IsoDateRoundtrip);
            Assert.AreEqual(@"\/Date(946688461000+0000)\/", result.MsDateRoundtrip);

            result = TestDateTime("DateTimeOffset TimeSpan 1 hour", new DateTimeOffset(2000, 1, 1, 1, 1, 1, TimeSpan.FromHours(1)));
            Assert.AreEqual("2000-01-01T01:01:01+01:00", result.IsoDateRoundtrip);
            Assert.AreEqual(@"\/Date(946684861000+0100)\/", result.MsDateRoundtrip);

            result = TestDateTime("DateTimeOffset TimeSpan 1.5 hour", new DateTimeOffset(2000, 1, 1, 1, 1, 1, TimeSpan.FromHours(1.5)));
            Assert.AreEqual("2000-01-01T01:01:01+01:30", result.IsoDateRoundtrip);
            Assert.AreEqual(@"\/Date(946683061000+0130)\/", result.MsDateRoundtrip);

            result = TestDateTime("DateTimeOffset TimeSpan 13 hour", new DateTimeOffset(2000, 1, 1, 1, 1, 1, TimeSpan.FromHours(13)));
            Assert.AreEqual("2000-01-01T01:01:01+13:00", result.IsoDateRoundtrip);
            Assert.AreEqual(@"\/Date(946641661000+1300)\/", result.MsDateRoundtrip);

            result = TestDateTime("DateTimeOffset TimeSpan with ticks", new DateTimeOffset(634663873826822481, TimeSpan.Zero));
            Assert.AreEqual("2012-03-03T16:03:02.6822481+00:00", result.IsoDateRoundtrip);
            Assert.AreEqual(@"\/Date(1330790582682+0000)\/", result.MsDateRoundtrip);

            result = TestDateTime("DateTimeOffset Min", DateTimeOffset.MinValue);
            Assert.AreEqual("0001-01-01T00:00:00+00:00", result.IsoDateRoundtrip);
            Assert.AreEqual(@"\/Date(-62135596800000+0000)\/", result.MsDateRoundtrip);

            result = TestDateTime("DateTimeOffset Max", DateTimeOffset.MaxValue);
            Assert.AreEqual("9999-12-31T23:59:59.9999999+00:00", result.IsoDateRoundtrip);
            Assert.AreEqual(@"\/Date(253402300799999+0000)\/", result.MsDateRoundtrip);

            result = TestDateTime("DateTimeOffset Default", default(DateTimeOffset));
            Assert.AreEqual("0001-01-01T00:00:00+00:00", result.IsoDateRoundtrip);
            Assert.AreEqual(@"\/Date(-62135596800000+0000)\/", result.MsDateRoundtrip);
#endif
        }

        public class DateTimeResult
        {
            public string IsoDateRoundtrip { get; set; }
            public string IsoDateLocal { get; set; }
            public string IsoDateUnspecified { get; set; }
            public string IsoDateUtc { get; set; }

            public string MsDateRoundtrip { get; set; }
            public string MsDateLocal { get; set; }
            public string MsDateUnspecified { get; set; }
            public string MsDateUtc { get; set; }
        }

        private DateTimeResult TestDateTime<T>(string name, T value)
        {
            Console.WriteLine(name);

            DateTimeResult result = new DateTimeResult()
            {
                IsoDateRoundtrip = TestDateTimeFormat(value, DateFormatHandling.IsoDateFormat, DateTimeZoneHandling.RoundtripKind)
            };

            if (value is DateTime)
            {
                result.IsoDateLocal = TestDateTimeFormat(value, DateFormatHandling.IsoDateFormat, DateTimeZoneHandling.Local);
                result.IsoDateUnspecified = TestDateTimeFormat(value, DateFormatHandling.IsoDateFormat, DateTimeZoneHandling.Unspecified);
                result.IsoDateUtc = TestDateTimeFormat(value, DateFormatHandling.IsoDateFormat, DateTimeZoneHandling.Utc);
            }

            result.MsDateRoundtrip = TestDateTimeFormat(value, DateFormatHandling.MicrosoftDateFormat, DateTimeZoneHandling.RoundtripKind);
            if (value is DateTime)
            {
                result.MsDateLocal = TestDateTimeFormat(value, DateFormatHandling.MicrosoftDateFormat, DateTimeZoneHandling.Local);
                result.MsDateUnspecified = TestDateTimeFormat(value, DateFormatHandling.MicrosoftDateFormat, DateTimeZoneHandling.Unspecified);
                result.MsDateUtc = TestDateTimeFormat(value, DateFormatHandling.MicrosoftDateFormat, DateTimeZoneHandling.Utc);
            }

            TestDateTimeFormat(value, new IsoDateTimeConverter());
            
            if (value is DateTime)
            {
                Console.WriteLine(XmlConvert.ToString((DateTime)(object)value, XmlDateTimeSerializationMode.RoundtripKind));
            }
            else
            {
                Console.WriteLine(XmlConvert.ToString((DateTimeOffset)(object)value));
            }

#if !NET20
            MemoryStream ms = new MemoryStream();
            DataContractSerializer s = new DataContractSerializer(typeof(T));
            s.WriteObject(ms, value);
            string json = Encoding.UTF8.GetString(ms.ToArray(), 0, Convert.ToInt32(ms.Length));
            Console.WriteLine(json);
#endif

            Console.WriteLine();

            return result;
        }

        private static string TestDateTimeFormat<T>(T value, DateFormatHandling format, DateTimeZoneHandling timeZoneHandling)
        {
            string date = null;

            if (value is DateTime)
            {
                date = JsonConvert.ToString((DateTime)(object)value, format, timeZoneHandling);
            }
            else
            {
#if !NET20
                date = JsonConvert.ToString((DateTimeOffset)(object)value, format);
#endif
            }

            Console.WriteLine(format.ToString("g") + "-" + timeZoneHandling.ToString("g") + ": " + date);

            if (timeZoneHandling == DateTimeZoneHandling.RoundtripKind)
            {
                T parsed = JsonConvert.DeserializeObject<T>(date);
                if (!value.Equals(parsed))
                {
                    long valueTicks = GetTicks(value);
                    long parsedTicks = GetTicks(parsed);

                    valueTicks = (valueTicks / 10000) * 10000;

                    Assert.AreEqual(valueTicks, parsedTicks);
                }
            }

            return date.Trim('"');
        }

        private static void TestDateTimeFormat<T>(T value, JsonConverter converter)
        {
            string date = Write(value, converter);

            Console.WriteLine(converter.GetType().Name + ": " + date);

            T parsed = Read<T>(date, converter);

            try
            {
                Assert.AreEqual(value, parsed);
            }
            catch (Exception)
            {
                // JavaScript ticks aren't as precise, recheck after rounding
                long valueTicks = GetTicks(value);
                long parsedTicks = GetTicks(parsed);

                valueTicks = (valueTicks / 10000) * 10000;

                Assert.AreEqual(valueTicks, parsedTicks);
            }
        }

        public static long GetTicks(object value)
        {
            return (value is DateTime) ? ((DateTime)value).Ticks : ((DateTimeOffset)value).Ticks;
        }

        public static string Write(object value, JsonConverter converter)
        {
            StringWriter sw = new StringWriter();
            JsonTextWriter writer = new JsonTextWriter(sw);
            converter.WriteJson(writer, value, null);

            writer.Flush();
            return sw.ToString();
        }

        public static T Read<T>(string text, JsonConverter converter)
        {
            JsonTextReader reader = new JsonTextReader(new StringReader(text));
            reader.ReadAsString();

            return (T)converter.ReadJson(reader, typeof(T), null, null);
        }

        [Test]
        public void SerializeObjectDateTimeZoneHandling()
        {
            string json = JsonConvert.SerializeObject(
                new DateTime(2000, 1, 1, 1, 1, 1, DateTimeKind.Unspecified),
                new JsonSerializerSettings
                {
                    DateTimeZoneHandling = DateTimeZoneHandling.Utc
                });

            Assert.AreEqual(@"""2000-01-01T01:01:01Z""", json);
        }

        [Test]
        public void DeserializeObject()
        {
            string json = @"{
        'Name': 'Bad Boys',
        'ReleaseDate': '1995-4-7T00:00:00',
        'Genres': [
          'Action',
          'Comedy'
        ]
      }";

            Movie m = JsonConvert.DeserializeObject<Movie>(json);

            string name = m.Name;
            // Bad Boys

            Assert.AreEqual("Bad Boys", m.Name);
        }

#if !NET20
        [Test]
        public void TestJsonDateTimeOffsetRoundtrip()
        {
            var now = DateTimeOffset.Now;
            var dict = new Dictionary<string, object> { { "foo", now } };

            var settings = new JsonSerializerSettings()
            {
                DateFormatHandling = DateFormatHandling.IsoDateFormat,
                DateParseHandling = DateParseHandling.DateTimeOffset,
                DateTimeZoneHandling = DateTimeZoneHandling.RoundtripKind
            };
            var json = JsonConvert.SerializeObject(dict, settings);

            var newDict = new Dictionary<string, object>();
            JsonConvert.PopulateObject(json, newDict, settings);

            var date = newDict["foo"];

            Assert.AreEqual(date, now);
        }

        [Test]
        public void MaximumDateTimeOffsetLength()
        {
            DateTimeOffset dt = new DateTimeOffset(2000, 12, 31, 20, 59, 59, new TimeSpan(0, 11, 33, 0, 0));
            dt = dt.AddTicks(9999999);

            StringWriter sw = new StringWriter();
            JsonTextWriter writer = new JsonTextWriter(sw);

            writer.WriteValue(dt);
            writer.Flush();

            Assert.AreEqual(@"""2000-12-31T20:59:59.9999999+11:33""", sw.ToString());
        }
#endif

        [Test]
        public void MaximumDateTimeLength()
        {
            DateTime dt = new DateTime(2000, 12, 31, 20, 59, 59, DateTimeKind.Local);
            dt = dt.AddTicks(9999999);

            StringWriter sw = new StringWriter();
            JsonTextWriter writer = new JsonTextWriter(sw);

            writer.WriteValue(dt);
            writer.Flush();
        }

        [Test]
        public void MaximumDateTimeMicrosoftDateFormatLength()
        {
            DateTime dt = DateTime.MaxValue;

            StringWriter sw = new StringWriter();
            JsonTextWriter writer = new JsonTextWriter(sw)
            {
                DateFormatHandling = DateFormatHandling.MicrosoftDateFormat
            };
            writer.WriteValue(dt);
            writer.Flush();
        }

#if !(NET20 || NET35 || PORTABLE40 || PORTABLE) || NETSTANDARD1_3 || NETSTANDARD2_0
        [Test]
        public void IntegerLengthOverflows()
        {
            // Maximum javascript number length (in characters) is 380
            JObject o = JObject.Parse(@"{""biginteger"":" + new String('9', 380) + "}");
            JValue v = (JValue)o["biginteger"];
            Assert.AreEqual(JTokenType.Integer, v.Type);
            Assert.AreEqual(typeof(BigInteger), v.Value.GetType());
            Assert.AreEqual(BigInteger.Parse(new String('9', 380)), (BigInteger)v.Value);

            ExceptionAssert.Throws<JsonReaderException>(() => JObject.Parse(@"{""biginteger"":" + new String('9', 381) + "}"), "JSON integer " + new String('9', 381) + " is too large to parse. Path 'biginteger', line 1, position 395.");
        }
#endif

        [Test]
        public void ParseIsoDate()
        {
            StringReader sr = new StringReader(@"""2014-02-14T14:25:02-13:00""");

            JsonReader jsonReader = new JsonTextReader(sr);

            Assert.IsTrue(jsonReader.Read());
            Assert.AreEqual(typeof(DateTime), jsonReader.ValueType);
        }

#if false
        [Test]
        public void StackOverflowTest()
        {
            StringBuilder sb = new StringBuilder();

            int depth = 900;
            for (int i = 0; i < depth; i++)
            {
                sb.Append("{'A':");
            }

            // invalid json
            sb.Append("{***}");
            for (int i = 0; i < depth; i++)
            {
                sb.Append("}");
            }

            string json = sb.ToString();
            JsonSerializer serializer = new JsonSerializer() { };
            serializer.Deserialize<Nest>(new JsonTextReader(new StringReader(json)));
        }
#endif

        public class Nest
        {
            public Nest A { get; set; }
        }

        [Test]
        public void ParametersPassedToJsonConverterConstructor()
        {
            ClobberMyProperties clobber = new ClobberMyProperties { One = "Red", Two = "Green", Three = "Yellow", Four = "Black" };
            string json = JsonConvert.SerializeObject(clobber);

            Assert.AreEqual("{\"One\":\"Uno-1-Red\",\"Two\":\"Dos-2-Green\",\"Three\":\"Tres-1337-Yellow\",\"Four\":\"Black\"}", json);
        }

        public class ClobberMyProperties
        {
            [JsonConverter(typeof(ClobberingJsonConverter), "Uno", 1)]
            public string One { get; set; }

            [JsonConverter(typeof(ClobberingJsonConverter), "Dos", 2)]
            public string Two { get; set; }

            [JsonConverter(typeof(ClobberingJsonConverter), "Tres")]
            public string Three { get; set; }

            public string Four { get; set; }
        }

        public class ClobberingJsonConverter : JsonConverter
        {
            public string ClobberValueString { get; private set; }

            public int ClobberValueInt { get; private set; }

            public ClobberingJsonConverter(string clobberValueString, int clobberValueInt)
            {
                ClobberValueString = clobberValueString;
                ClobberValueInt = clobberValueInt;
            }

            public ClobberingJsonConverter(string clobberValueString)
                : this(clobberValueString, 1337)
            {
            }

            public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
            {
                writer.WriteValue(ClobberValueString + "-" + ClobberValueInt.ToString() + "-" + value.ToString());
            }

            public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
            {
                throw new NotImplementedException();
            }

            public override bool CanConvert(Type objectType)
            {
                return objectType == typeof(string);
            }
        }

        [Test]
        public void WrongParametersPassedToJsonConvertConstructorShouldThrow()
        {
            IncorrectJsonConvertParameters value = new IncorrectJsonConvertParameters { One = "Boom" };

            ExceptionAssert.Throws<JsonException>(() => { JsonConvert.SerializeObject(value); });
        }

        public class IncorrectJsonConvertParameters
        {
            /// <summary>
            /// We deliberately use the wrong number/type of arguments for ClobberingJsonConverter to ensure an 
            /// exception is thrown.
            /// </summary>
            [JsonConverter(typeof(ClobberingJsonConverter), "Uno", "Blammo")]
            public string One { get; set; }
        }

        
        public class OverloadsJsonConverterer : JsonConverter
        {
            private readonly string _type;
            
            // constructor with Type argument

            public OverloadsJsonConverterer(Type typeParam)
            {
                _type = "Type";
            }
            
            public OverloadsJsonConverterer(object objectParam)
            {
                _type = string.Format("object({0})", objectParam.GetType().FullName);
            }

            // primitive type conversions

            public OverloadsJsonConverterer(byte byteParam)
            {
                _type = "byte";
            }

            public OverloadsJsonConverterer(short shortParam)
            {
                _type = "short";
            }

            public OverloadsJsonConverterer(int intParam)
            {
                _type = "int";
            }

            public OverloadsJsonConverterer(long longParam)
            {
                _type = "long";
            }

            public OverloadsJsonConverterer(double doubleParam)
            {
                _type = "double";
            }

            // params argument

            public OverloadsJsonConverterer(params int[] intParams)
            {
                _type = "int[]";
            }

            public OverloadsJsonConverterer(bool[] intParams)
            {
                _type = "bool[]";
            }

            // closest type resolution

            public OverloadsJsonConverterer(IEnumerable<string> iEnumerableParam)
            {
                _type = "IEnumerable<string>";
            }

            public OverloadsJsonConverterer(IList<string> iListParam)
            {
                _type = "IList<string>";
            }

            public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
            {
                writer.WriteValue(_type);
            }
            
            public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
            {
                throw new NotImplementedException();
            }

            public override bool CanConvert(Type objectType)
            {
                return objectType == typeof(int);
            }
            
        }

        public class OverloadWithTypeParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), typeof(int))]
            public int Overload { get; set; }
        }

        [Test]
        public void JsonConverterConstructor_OverloadWithTypeParam()
        {
            OverloadWithTypeParameter value = new OverloadWithTypeParameter();
            string json = JsonConvert.SerializeObject(value);

            Assert.AreEqual("{\"Overload\":\"Type\"}", json);
        }
        
        public class OverloadWithUnhandledParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), "str")]
            public int Overload { get; set; }
        }

        [Test]
        public void JsonConverterConstructor_OverloadWithUnhandledParam_FallbackToObject()
        {
            OverloadWithUnhandledParameter value = new OverloadWithUnhandledParameter();
            string json = JsonConvert.SerializeObject(value);

            Assert.AreEqual("{\"Overload\":\"object(System.String)\"}", json);
        }

        public class OverloadWithIntParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), 1)]
            public int Overload { get; set; }
        }

        public class OverloadWithUIntParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), 1U)]
            public int Overload { get; set; }
        }

        public class OverloadWithLongParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), 1L)]
            public int Overload { get; set; }
        }

        public class OverloadWithULongParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), 1UL)]
            public int Overload { get; set; }
        }
        
        public class OverloadWithShortParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), (short)1)]
            public int Overload { get; set; }
        }

        public class OverloadWithUShortParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), (ushort)1)]
            public int Overload { get; set; }
        }

        public class OverloadWithSByteParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), (sbyte)1)]
            public int Overload { get; set; }
        }
        
        public class OverloadWithByteParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), (byte)1)]
            public int Overload { get; set; }
        }

        public class OverloadWithCharParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), 'a')]
            public int Overload { get; set; }
        }

        public class OverloadWithBoolParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), true)]
            public int Overload { get; set; }
        }

        public class OverloadWithFloatParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), 1.5f)]
            public int Overload { get; set; }
        }

        public class OverloadWithDoubleParameter
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), 1.5)]
            public int Overload { get; set; }
        }
        
        [Test]
        public void JsonConverterConstructor_OverloadsWithPrimitiveParams()
        {
            {
                OverloadWithIntParameter value = new OverloadWithIntParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"int\"}", json);
            }

            {
                // uint -> long
                OverloadWithUIntParameter value = new OverloadWithUIntParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"long\"}", json);
            }

            {
                OverloadWithLongParameter value = new OverloadWithLongParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"long\"}", json);
            }

            {
                // ulong -> double
                OverloadWithULongParameter value = new OverloadWithULongParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"double\"}", json);
            }

            {
                OverloadWithShortParameter value = new OverloadWithShortParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"short\"}", json);
            }

            {
                // ushort -> int
                OverloadWithUShortParameter value = new OverloadWithUShortParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"int\"}", json);
            }

            {
                // sbyte -> short
                OverloadWithSByteParameter value = new OverloadWithSByteParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"short\"}", json);
            }

            {
                OverloadWithByteParameter value = new OverloadWithByteParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"byte\"}", json);
            }

            {
                // char -> int
                OverloadWithCharParameter value = new OverloadWithCharParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"int\"}", json);
            }

            {
                // bool -> (object)bool
                OverloadWithBoolParameter value = new OverloadWithBoolParameter();
                var json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"object(System.Boolean)\"}", json);
            }

            {
                // float -> double
                OverloadWithFloatParameter value = new OverloadWithFloatParameter();
                string json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"double\"}", json);
            }

            {
                OverloadWithDoubleParameter value = new OverloadWithDoubleParameter();
                var json = JsonConvert.SerializeObject(value);
                Assert.AreEqual("{\"Overload\":\"double\"}", json);
            }
        }

        public class OverloadWithArrayParameters
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), new int[] { 1, 2, 3 })]
            public int WithParams { get; set; }

            [JsonConverter(typeof(OverloadsJsonConverterer), new bool[] { true, false })]
            public int WithoutParams { get; set; }
        }

        [Test]
        public void JsonConverterConstructor_OverloadsWithArrayParams()
        {
            OverloadWithArrayParameters value = new OverloadWithArrayParameters();
            string json = JsonConvert.SerializeObject(value);

            Assert.AreEqual("{\"WithParams\":\"int[]\",\"WithoutParams\":\"bool[]\"}", json);
        }

        public class OverloadWithBaseType
        {
            [JsonConverter(typeof(OverloadsJsonConverterer), new object[] { new string[] { "a", "b", "c" } })]
            public int Overload { get; set; }
        }

        //[Test]
        //[Ignore("https://github.com/dotnet/roslyn/issues/36974")]
        //public void JsonConverterConstructor_OverloadsWithBaseTypes()
        //{
        //    OverloadWithBaseType value = new OverloadWithBaseType();
        //    string json = JsonConvert.SerializeObject(value);

        //    Assert.AreEqual("{\"Overload\":\"IList<string>\"}", json);
        //}


        [Test]
        public void CustomDoubleRounding()
        {
            var measurements = new Measurements
            {
                Loads = new List<double> { 23283.567554707258, 23224.849899771067, 23062.5, 22846.272519910868, 22594.281246368635 },
                Positions = new List<double> { 57.724227689317019, 60.440934405753069, 63.444192925248643, 66.813119113482557, 70.4496501404433 },
                Gain = 12345.67895111213
            };

            string json = JsonConvert.SerializeObject(measurements);

            Assert.AreEqual("{\"Positions\":[57.72,60.44,63.44,66.81,70.45],\"Loads\":[23284.0,23225.0,23062.0,22846.0,22594.0],\"Gain\":12345.679}", json);
        }

        public class Measurements
        {
            [JsonProperty(ItemConverterType = typeof(RoundingJsonConverter))]
            public List<double> Positions { get; set; }

            [JsonProperty(ItemConverterType = typeof(RoundingJsonConverter), ItemConverterParameters = new object[] { 0, MidpointRounding.ToEven })]
            public List<double> Loads { get; set; }

            [JsonConverter(typeof(RoundingJsonConverter), 4)]
            public double Gain { get; set; }
        }

        public class RoundingJsonConverter : JsonConverter
        {
            int _precision;
            MidpointRounding _rounding;

            public RoundingJsonConverter()
                : this(2)
            {
            }

            public RoundingJsonConverter(int precision)
                : this(precision, MidpointRounding.AwayFromZero)
            {
            }

            public RoundingJsonConverter(int precision, MidpointRounding rounding)
            {
                _precision = precision;
                _rounding = rounding;
            }

            public override bool CanRead
            {
                get { return false; }
            }

            public override bool CanConvert(Type objectType)
            {
                return objectType == typeof(double);
            }

            public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
            {
                throw new NotImplementedException();
            }

            public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
            {
                writer.WriteValue(Math.Round((double)value, _precision, _rounding));
            }
        }

        [Test]
        public void GenericBaseClassSerialization()
        {
            string json = JsonConvert.SerializeObject(new NonGenericChildClass());
            Assert.AreEqual("{\"Data\":null}", json);
        }

        public class GenericBaseClass<O, T>
        {
            public virtual T Data { get; set; }
        }

        public class GenericIntermediateClass<O> : GenericBaseClass<O, string>
        {
            public override string Data { get; set; }
        }

        public class NonGenericChildClass : GenericIntermediateClass<int>
        {
        }

        [Test]
        public void ShouldNotPopulateReadOnlyEnumerableObjectWithNonDefaultConstructor()
        {
            object actual = JsonConvert.DeserializeObject<HasReadOnlyEnumerableObject>("{\"foo\":{}}");
            Assert.IsNotNull(actual);
        }

        [Test]
        public void ShouldNotPopulateReadOnlyEnumerableObjectWithDefaultConstructor()
        {
            object actual = JsonConvert.DeserializeObject<HasReadOnlyEnumerableObjectAndDefaultConstructor>("{\"foo\":{}}");
            Assert.IsNotNull(actual);
        }

        [Test]
        public void ShouldNotPopulateContructorArgumentEnumerableObject()
        {
            object actual = JsonConvert.DeserializeObject<AcceptsEnumerableObjectToConstructor>("{\"foo\":{}}");
            Assert.IsNotNull(actual);
        }

        [Test]
        public void ShouldNotPopulateEnumerableObjectProperty()
        {
            object actual = JsonConvert.DeserializeObject<HasEnumerableObject>("{\"foo\":{}}");
            Assert.IsNotNull(actual);
        }

#if !(NET40 || NET35 || NET20 || PORTABLE40)
        [Test]
        public void ShouldNotPopulateReadOnlyDictionaryObjectWithNonDefaultConstructor()
        {
            object actual = JsonConvert.DeserializeObject<HasReadOnlyDictionary>("{\"foo\":{'key':'value'}}");
            Assert.IsNotNull(actual);
        }

        public sealed class HasReadOnlyDictionary
        {
            [JsonProperty("foo")]
            public IReadOnlyDictionary<string, string> Foo { get; } = new ReadOnlyDictionary<string, string>(new Dictionary<string, string>());

            [JsonConstructor]
            public HasReadOnlyDictionary([JsonProperty("bar")] int bar)
            {

            }
        }
#endif

        public sealed class HasReadOnlyEnumerableObject
        {
            [JsonProperty("foo")]
            public EnumerableWithConverter Foo { get; } = new EnumerableWithConverter();

            [JsonConstructor]
            public HasReadOnlyEnumerableObject([JsonProperty("bar")] int bar)
            {

            }
        }

        public sealed class HasReadOnlyEnumerableObjectAndDefaultConstructor
        {
            [JsonProperty("foo")]
            public EnumerableWithConverter Foo { get; } = new EnumerableWithConverter();

            [JsonConstructor]
            public HasReadOnlyEnumerableObjectAndDefaultConstructor()
            {

            }
        }

        public sealed class AcceptsEnumerableObjectToConstructor
        {
            [JsonConstructor]
            public AcceptsEnumerableObjectToConstructor
            (
                [JsonProperty("foo")] EnumerableWithConverter foo,
                [JsonProperty("bar")] int bar
            )
            {

            }
        }

        public sealed class HasEnumerableObject
        {
            [JsonProperty("foo")]
            public EnumerableWithConverter Foo { get; set; } = new EnumerableWithConverter();

            [JsonConstructor]
            public HasEnumerableObject([JsonProperty("bar")] int bar)
            {

            }
        }

        [JsonConverter(typeof(Converter))]
        public sealed class EnumerableWithConverter : IEnumerable<int>
        {
            public sealed class Converter : JsonConverter
            {
                public override bool CanConvert(Type objectType)
                    => objectType == typeof(Foo);

                public override object ReadJson
                    (JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
                {
                    reader.Skip();
                    return new EnumerableWithConverter();
                }

                public override void WriteJson
                    (JsonWriter writer, object value, JsonSerializer serializer)
                {
                    writer.WriteStartObject();
                    writer.WriteEndObject();
                }
            }

            public IEnumerator<int> GetEnumerator()
            {
                yield break;
            }

            IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
        }

        [Test]
        public void ShouldNotRequireIgnoredPropertiesWithItemsRequired()
        {
            string json = @"{
  ""exp"": 1483228800,
  ""active"": true
}";
            ItemsRequiredObjectWithIgnoredProperty value = JsonConvert.DeserializeObject<ItemsRequiredObjectWithIgnoredProperty>(json);
            Assert.IsNotNull(value);
            Assert.AreEqual(value.Expiration, new DateTime(2017, 1, 1, 0, 0, 0, DateTimeKind.Utc));
            Assert.AreEqual(value.Active, true);
        }

        [JsonObject(ItemRequired = Required.Always)]
        public sealed class ItemsRequiredObjectWithIgnoredProperty
        {
            private static readonly DateTime s_unixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

            [JsonProperty("exp")]
            private int _expiration
            {
                get
                {
                    return (int)((Expiration - s_unixEpoch).TotalSeconds);
                }
                set
                {
                    Expiration = s_unixEpoch.AddSeconds(value);
                }
            }

            public bool Active { get; set; }

            [JsonIgnore]
            public DateTime Expiration { get; set; }
        }
    }
}