#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.Generic;
using System.Runtime.Serialization;
using System.Text;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Serialization;
using Newtonsoft.Json.Tests.TestObjects;
#if NET20
using Newtonsoft.Json.Utilities.LinqBridge;
#else
using System.Linq;
#endif
#if NETFX_CORE
using Microsoft.VisualStudio.TestPlatform.UnitTestFramework;
using TestFixture = Microsoft.VisualStudio.TestPlatform.UnitTestFramework.TestClassAttribute;
using Test = Microsoft.VisualStudio.TestPlatform.UnitTestFramework.TestMethodAttribute;
#elif ASPNETCORE50
using Xunit;
using Test = Xunit.FactAttribute;
using Assert = Newtonsoft.Json.Tests.XUnitAssert;
#else
using NUnit.Framework;
#endif
using System.IO;
using ErrorEventArgs = Newtonsoft.Json.Serialization.ErrorEventArgs;

namespace Newtonsoft.Json.Tests.Serialization
{
    [TestFixture]
    public class SerializationErrorHandlingTests : TestFixtureBase
    {
        [Test]
        public void ErrorDeserializingListHandled()
        {
            string json = @"[
  {
    ""Name"": ""Jim"",
    ""BirthDate"": ""\/Date(978048000000)\/"",
    ""LastModified"": ""\/Date(978048000000)\/""
  },
  {
    ""Name"": ""Jim"",
    ""BirthDate"": ""\/Date(978048000000)\/"",
    ""LastModified"": ""\/Date(978048000000)\/""
  }
]";

            var possibleMsgs = new [] {
                "[1] - Error message for member 1 = An item with the same key has already been added.",
                "[1] - Error message for member 1 = An element with the same key already exists in the dictionary." // mono
            };
            VersionKeyedCollection c = JsonConvert.DeserializeObject<VersionKeyedCollection>(json);
            Assert.AreEqual(1, c.Count);
            Assert.AreEqual(1, c.Messages.Count);
            Assert.IsTrue (possibleMsgs.Any (m => m == c.Messages[0]), "Expected One of: " + Environment.NewLine + string.Join (Environment.NewLine, possibleMsgs) + Environment.NewLine + "Was: " + Environment.NewLine + c.Messages[0]);
        }

        [Test]
        public void DeserializingErrorInChildObject()
        {
            ListErrorObjectCollection c = JsonConvert.DeserializeObject<ListErrorObjectCollection>(@"[
  {
    ""Member"": ""Value1"",
    ""Member2"": null
  },
  {
    ""Member"": ""Value2""
  },
  {
    ""ThrowError"": ""Value"",
    ""Object"": {
      ""Array"": [
        1,
        2
      ]
    }
  },
  {
    ""ThrowError"": ""Handle this!"",
    ""Member"": ""Value3""
  }
]");

            Assert.AreEqual(3, c.Count);
            Assert.AreEqual("Value1", c[0].Member);
            Assert.AreEqual("Value2", c[1].Member);
            Assert.AreEqual("Value3", c[2].Member);
            Assert.AreEqual("Handle this!", c[2].ThrowError);
        }

        [Test]
        public void SerializingErrorIn3DArray()
        {
            ListErrorObject[,,] c = new ListErrorObject[,,]
            {
                {
                    {
                        new ListErrorObject
                        {
                            Member = "Value1",
                            ThrowError = "Handle this!",
                            Member2 = "Member1"
                        },
                        new ListErrorObject
                        {
                            Member = "Value2",
                            Member2 = "Member2"
                        },
                        new ListErrorObject
                        {
                            Member = "Value3",
                            ThrowError = "Handle that!",
                            Member2 = "Member3"
                        }
                    },
                    {
                        new ListErrorObject
                        {
                            Member = "Value1",
                            ThrowError = "Handle this!",
                            Member2 = "Member1"
                        },
                        new ListErrorObject
                        {
                            Member = "Value2",
                            Member2 = "Member2"
                        },
                        new ListErrorObject
                        {
                            Member = "Value3",
                            ThrowError = "Handle that!",
                            Member2 = "Member3"
                        }
                    }
                }
            };

            string json = JsonConvert.SerializeObject(c, new JsonSerializerSettings
            {
                Formatting = Formatting.Indented,
                Error = (s, e) =>
                {
                    if (e.CurrentObject.GetType().IsArray)
                        e.ErrorContext.Handled = true;
                }
            });

            StringAssert.AreEqual(@"[
  [
    [
      {
        ""Member"": ""Value1"",
        ""ThrowError"": ""Handle this!"",
        ""Member2"": ""Member1""
      },
      {
        ""Member"": ""Value2""
      },
      {
        ""Member"": ""Value3"",
        ""ThrowError"": ""Handle that!"",
        ""Member2"": ""Member3""
      }
    ],
    [
      {
        ""Member"": ""Value1"",
        ""ThrowError"": ""Handle this!"",
        ""Member2"": ""Member1""
      },
      {
        ""Member"": ""Value2""
      },
      {
        ""Member"": ""Value3"",
        ""ThrowError"": ""Handle that!"",
        ""Member2"": ""Member3""
      }
    ]
  ]
]", json);
        }

        [Test]
        public void SerializingErrorInChildObject()
        {
            ListErrorObjectCollection c = new ListErrorObjectCollection
            {
                new ListErrorObject
                {
                    Member = "Value1",
                    ThrowError = "Handle this!",
                    Member2 = "Member1"
                },
                new ListErrorObject
                {
                    Member = "Value2",
                    Member2 = "Member2"
                },
                new ListErrorObject
                {
                    Member = "Value3",
                    ThrowError = "Handle that!",
                    Member2 = "Member3"
                }
            };

            string json = JsonConvert.SerializeObject(c, Formatting.Indented);

            StringAssert.AreEqual(@"[
  {
    ""Member"": ""Value1"",
    ""ThrowError"": ""Handle this!"",
    ""Member2"": ""Member1""
  },
  {
    ""Member"": ""Value2""
  },
  {
    ""Member"": ""Value3"",
    ""ThrowError"": ""Handle that!"",
    ""Member2"": ""Member3""
  }
]", json);
        }

        [Test]
        public void DeserializingErrorInDateTimeCollection()
        {
            DateTimeErrorObjectCollection c = JsonConvert.DeserializeObject<DateTimeErrorObjectCollection>(@"[
  ""2009-09-09T00:00:00Z"",
  ""kjhkjhkjhkjh"",
  [
    1
  ],
  ""1977-02-20T00:00:00Z"",
  null,
  ""2000-12-01T00:00:00Z""
]", new IsoDateTimeConverter());

            Assert.AreEqual(3, c.Count);
            Assert.AreEqual(new DateTime(2009, 9, 9, 0, 0, 0, DateTimeKind.Utc), c[0]);
            Assert.AreEqual(new DateTime(1977, 2, 20, 0, 0, 0, DateTimeKind.Utc), c[1]);
            Assert.AreEqual(new DateTime(2000, 12, 1, 0, 0, 0, DateTimeKind.Utc), c[2]);
        }

        [Test]
        public void DeserializingErrorHandlingUsingEvent()
        {
            List<string> errors = new List<string>();

            JsonSerializer serializer = JsonSerializer.Create(new JsonSerializerSettings
            {
                Error = delegate(object sender, ErrorEventArgs args)
                {
                    errors.Add(args.ErrorContext.Path + " - " + args.ErrorContext.Member + " - " + args.ErrorContext.Error.Message);
                    args.ErrorContext.Handled = true;
                },
                Converters = { new IsoDateTimeConverter() }
            });
            var c = serializer.Deserialize<List<DateTime>>(new JsonTextReader(new StringReader(@"[
        ""2009-09-09T00:00:00Z"",
        ""I am not a date and will error!"",
        [
          1
        ],
        ""1977-02-20T00:00:00Z"",
        null,
        ""2000-12-01T00:00:00Z""
      ]")));


            // 2009-09-09T00:00:00Z
            // 1977-02-20T00:00:00Z
            // 2000-12-01T00:00:00Z

            // The string was not recognized as a valid DateTime. There is a unknown word starting at index 0.
            // Unexpected token parsing date. Expected String, got StartArray.
            // Cannot convert null value to System.DateTime.

            Assert.AreEqual(3, c.Count);
            Assert.AreEqual(new DateTime(2009, 9, 9, 0, 0, 0, DateTimeKind.Utc), c[0]);
            Assert.AreEqual(new DateTime(1977, 2, 20, 0, 0, 0, DateTimeKind.Utc), c[1]);
            Assert.AreEqual(new DateTime(2000, 12, 1, 0, 0, 0, DateTimeKind.Utc), c[2]);

            Assert.AreEqual(3, errors.Count);
#if !(NET20 || NET35)
            var possibleErrs = new [] {
                "[1] - 1 - The string was not recognized as a valid DateTime. There is an unknown word starting at index 0.",
                "[1] - 1 - String was not recognized as a valid DateTime."
            };

            Assert.IsTrue(possibleErrs.Any (m => m == errors[0]), 
                "Expected One of: " + string.Join (Environment.NewLine, possibleErrs) + Environment.NewLine + "But was: " + errors[0]);
#else
      Assert.AreEqual("[1] - 1 - The string was not recognized as a valid DateTime. There is a unknown word starting at index 0.", errors[0]);
#endif
            Assert.AreEqual("[2] - 2 - Unexpected token parsing date. Expected String, got StartArray. Path '[2]', line 4, position 10.", errors[1]);
            Assert.AreEqual("[4] - 4 - Cannot convert null value to System.DateTime. Path '[4]', line 8, position 13.", errors[2]);
        }

        [Test]
        public void DeserializingErrorInDateTimeCollectionWithAttributeWithEventNotCalled()
        {
            bool eventErrorHandlerCalled = false;

            DateTimeErrorObjectCollection c = JsonConvert.DeserializeObject<DateTimeErrorObjectCollection>(
                @"[
  ""2009-09-09T00:00:00Z"",
  ""kjhkjhkjhkjh"",
  [
    1
  ],
  ""1977-02-20T00:00:00Z"",
  null,
  ""2000-12-01T00:00:00Z""
]",
                new JsonSerializerSettings
                {
                    Error = (s, a) => eventErrorHandlerCalled = true,
                    Converters =
                    {
                        new IsoDateTimeConverter()
                    }
                });

            Assert.AreEqual(3, c.Count);
            Assert.AreEqual(new DateTime(2009, 9, 9, 0, 0, 0, DateTimeKind.Utc), c[0]);
            Assert.AreEqual(new DateTime(1977, 2, 20, 0, 0, 0, DateTimeKind.Utc), c[1]);
            Assert.AreEqual(new DateTime(2000, 12, 1, 0, 0, 0, DateTimeKind.Utc), c[2]);

            Assert.AreEqual(false, eventErrorHandlerCalled);
        }

        [Test]
        public void SerializePerson()
        {
            PersonError person = new PersonError
            {
                Name = "George Michael Bluth",
                Age = 16,
                Roles = null,
                Title = "Mister Manager"
            };

            string json = JsonConvert.SerializeObject(person, Formatting.Indented);

            Console.WriteLine(json);
            //{
            //  "Name": "George Michael Bluth",
            //  "Age": 16,
            //  "Title": "Mister Manager"
            //}

            StringAssert.AreEqual(@"{
  ""Name"": ""George Michael Bluth"",
  ""Age"": 16,
  ""Title"": ""Mister Manager""
}", json);
        }

        [Test]
        public void DeserializeNestedUnhandled()
        {
            List<string> errors = new List<string>();

            string json = @"[[""kjhkjhkjhkjh""]]";

            Exception e = null;
            try
            {
                JsonSerializer serializer = new JsonSerializer();
                serializer.Error += delegate(object sender, ErrorEventArgs args)
                {
                    // only log an error once
                    if (args.CurrentObject == args.ErrorContext.OriginalObject)
                        errors.Add(args.ErrorContext.Path + " - " + args.ErrorContext.Member + " - " + args.ErrorContext.Error.Message);
                };

                serializer.Deserialize(new StringReader(json), typeof(List<List<DateTime>>));
            }
            catch (Exception ex)
            {
                e = ex;
            }

            Assert.AreEqual(@"Could not convert string to DateTime: kjhkjhkjhkjh. Path '[0][0]', line 1, position 16.", e.Message);

            Assert.AreEqual(1, errors.Count);
            Assert.AreEqual(@"[0][0] - 0 - Could not convert string to DateTime: kjhkjhkjhkjh. Path '[0][0]', line 1, position 16.", errors[0]);
        }

        [Test]
        public void MultipleRequiredPropertyErrors()
        {
            string json = "{}";
            List<string> errors = new List<string>();
            JsonSerializer serializer = new JsonSerializer();
            serializer.MetadataPropertyHandling = MetadataPropertyHandling.Default;
            serializer.Error += delegate(object sender, ErrorEventArgs args)
            {
                errors.Add(args.ErrorContext.Path + " - " + args.ErrorContext.Member + " - " + args.ErrorContext.Error.Message);
                args.ErrorContext.Handled = true;
            };
            serializer.Deserialize(new JsonTextReader(new StringReader(json)), typeof(MyTypeWithRequiredMembers));

            Assert.AreEqual(2, errors.Count);
            Assert.IsTrue(errors[0].StartsWith(" - Required1 - Required property 'Required1' not found in JSON. Path '', line 1, position 2."));
            Assert.IsTrue(errors[1].StartsWith(" - Required2 - Required property 'Required2' not found in JSON. Path '', line 1, position 2."));
        }

        [Test]
        public void HandlingArrayErrors()
        {
            string json = "[\"a\",\"b\",\"45\",34]";

            List<string> errors = new List<string>();

            JsonSerializer serializer = new JsonSerializer();
            serializer.Error += delegate(object sender, ErrorEventArgs args)
            {
                errors.Add(args.ErrorContext.Path + " - " + args.ErrorContext.Member + " - " + args.ErrorContext.Error.Message);
                args.ErrorContext.Handled = true;
            };

            serializer.Deserialize(new JsonTextReader(new StringReader(json)), typeof(int[]));

            Assert.AreEqual(2, errors.Count);
            Assert.AreEqual("[0] - 0 - Could not convert string to integer: a. Path '[0]', line 1, position 4.", errors[0]);
            Assert.AreEqual("[1] - 1 - Could not convert string to integer: b. Path '[1]', line 1, position 8.", errors[1]);
        }

        [Test]
        public void HandlingMultidimensionalArrayErrors()
        {
            string json = "[[\"a\",\"45\"],[\"b\",34]]";

            List<string> errors = new List<string>();

            JsonSerializer serializer = new JsonSerializer();
            serializer.Error += delegate(object sender, ErrorEventArgs args)
            {
                errors.Add(args.ErrorContext.Path + " - " + args.ErrorContext.Member + " - " + args.ErrorContext.Error.Message);
                args.ErrorContext.Handled = true;
            };

            serializer.Deserialize(new JsonTextReader(new StringReader(json)), typeof(int[,]));

            Assert.AreEqual(2, errors.Count);
            Assert.AreEqual("[0][0] - 0 - Could not convert string to integer: a. Path '[0][0]', line 1, position 5.", errors[0]);
            Assert.AreEqual("[1][0] - 0 - Could not convert string to integer: b. Path '[1][0]', line 1, position 16.", errors[1]);
        }

        [Test]
        public void ErrorHandlingAndAvoidingRecursiveDepthError()
        {
            string json = "{'A':{'A':{'A':{'A':{'A':{}}}}}}";
            JsonSerializer serializer = new JsonSerializer() { };
            IList<string> errors = new List<string>();
            serializer.Error += (sender, e) =>
            {
                e.ErrorContext.Handled = true;
                errors.Add(e.ErrorContext.Path);
            };

            serializer.Deserialize<Nest>(new JsonTextReader(new StringReader(json)) { MaxDepth = 3 });

            Assert.AreEqual(1, errors.Count);
            Assert.AreEqual("A.A.A", errors[0]);
        }

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

        [Test]
        public void InfiniteErrorHandlingLoopFromInputError()
        {
            IList<string> errors = new List<string>();

            JsonSerializer serializer = new JsonSerializer();
            serializer.Error += (sender, e) =>
            {
                errors.Add(e.ErrorContext.Error.Message);
                e.ErrorContext.Handled = true;
            };

            ErrorPerson[] result = serializer.Deserialize<ErrorPerson[]>(new JsonTextReader(new ThrowingReader()));

            Assert.IsNull(result);
            Assert.AreEqual(3, errors.Count);
            Assert.AreEqual("too far", errors[0]);
            Assert.AreEqual("too far", errors[1]);
            Assert.AreEqual("Infinite loop detected from error handling. Path '[1023]', line 1, position 65536.", errors[2]);
        }

        [Test]
        public void InfiniteLoopArrayHandling()
        {
            IList<string> errors = new List<string>();

            object o = JsonConvert.DeserializeObject(
                "[0,x]",
                typeof(int[]),
                new JsonSerializerSettings
                {
                    Error = (sender, arg) =>
                    {
                        errors.Add(arg.ErrorContext.Error.Message);
                        arg.ErrorContext.Handled = true;
                    }
                });

            Assert.IsNull(o);

            Assert.AreEqual(3, errors.Count);
            Assert.AreEqual("Unexpected character encountered while parsing value: x. Path '[0]', line 1, position 3.", errors[0]);
            Assert.AreEqual("Unexpected character encountered while parsing value: x. Path '[0]', line 1, position 3.", errors[1]);
            Assert.AreEqual("Infinite loop detected from error handling. Path '[0]', line 1, position 3.", errors[2]);
        }

        [Test]
        public void InfiniteLoopArrayHandlingInObject()
        {
            IList<string> errors = new List<string>();

            Dictionary<string, int[]> o = JsonConvert.DeserializeObject<Dictionary<string, int[]>>(
                "{'badarray':[0,x,2],'goodarray':[0,1,2]}",
                new JsonSerializerSettings
                {
                    MetadataPropertyHandling = MetadataPropertyHandling.Default,
                    Error = (sender, arg) =>
                    {
                        errors.Add(arg.ErrorContext.Error.Message);
                        arg.ErrorContext.Handled = true;
                    }
                });

            Assert.IsNull(o);

            Assert.AreEqual(4, errors.Count);
            Assert.AreEqual("Unexpected character encountered while parsing value: x. Path 'badarray[0]', line 1, position 15.", errors[0]);
            Assert.AreEqual("Unexpected character encountered while parsing value: x. Path 'badarray[0]', line 1, position 15.", errors[1]);
            Assert.AreEqual("Infinite loop detected from error handling. Path 'badarray[0]', line 1, position 15.", errors[2]);
            Assert.AreEqual("Unexpected character encountered while parsing value: x. Path 'badarray[0]', line 1, position 15.", errors[3]);
        }

        [Test]
        public void ErrorHandlingEndOfContent()
        {
            IList<string> errors = new List<string>();

            const string input = "{\"events\":[{\"code\":64411},{\"code\":64411,\"prio";

            const int maxDepth = 256;
            using (var jsonTextReader = new JsonTextReader(new StringReader(input)) { MaxDepth = maxDepth })
            {
                JsonSerializer jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings
                {
                    MaxDepth = maxDepth,
                    MetadataPropertyHandling = MetadataPropertyHandling.Default
                });
                jsonSerializer.Error += (sender, e) =>
                {
                    errors.Add(e.ErrorContext.Error.Message);
                    e.ErrorContext.Handled = true;
                };

                LogMessage logMessage = jsonSerializer.Deserialize<LogMessage>(jsonTextReader);

                Assert.IsNotNull(logMessage.Events);
                Assert.AreEqual(1, logMessage.Events.Count);
                Assert.AreEqual("64411", logMessage.Events[0].Code);
            }

            Assert.AreEqual(3, errors.Count);
            Assert.AreEqual(@"Unterminated string. Expected delimiter: "". Path 'events[1].code', line 1, position 45.", errors[0]);
            Assert.AreEqual(@"Unexpected end when deserializing array. Path 'events[1].code', line 1, position 45.", errors[1]);
            Assert.AreEqual(@"Unexpected end when deserializing object. Path 'events[1].code', line 1, position 45.", errors[2]);
        }

        [Test]
        public void ErrorHandlingEndOfContentDictionary()
        {
            IList<string> errors = new List<string>();

            const string input = "{\"events\":{\"code\":64411},\"events2\":{\"code\":64412,";

            const int maxDepth = 256;
            using (var jsonTextReader = new JsonTextReader(new StringReader(input)) { MaxDepth = maxDepth })
            {
                JsonSerializer jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings { MaxDepth = maxDepth, MetadataPropertyHandling = MetadataPropertyHandling.Default });
                jsonSerializer.Error += (sender, e) =>
                {
                    errors.Add(e.ErrorContext.Error.Message);
                    e.ErrorContext.Handled = true;
                };

                IDictionary<string, LogEvent> logEvents = jsonSerializer.Deserialize<IDictionary<string, LogEvent>>(jsonTextReader);

                Assert.IsNotNull(logEvents);
                Assert.AreEqual(2, logEvents.Count);
                Assert.AreEqual("64411", logEvents["events"].Code);
                Assert.AreEqual("64412", logEvents["events2"].Code);
            }

            Assert.AreEqual(2, errors.Count);
            Assert.AreEqual(@"Unexpected end when deserializing object. Path 'events2.code', line 1, position 49.", errors[0]);
            Assert.AreEqual(@"Unexpected end when deserializing object. Path 'events2.code', line 1, position 49.", errors[1]);
        }

#if !(NET35 || NET20 || PORTABLE40)
        [Test]
        public void ErrorHandlingEndOfContentDynamic()
        {
            IList<string> errors = new List<string>();

            string json = @"{
  ""Explicit"": true,
  ""Decimal"": 99.9,
  ""Int"": 1,
  ""ChildObject"": {
    ""Integer"": 123";

            TestDynamicObject newDynamicObject = JsonConvert.DeserializeObject<TestDynamicObject>(json, new JsonSerializerSettings
            {
                Error = (sender, e) =>
                {
                    errors.Add(e.ErrorContext.Error.Message);
                    e.ErrorContext.Handled = true;
                },
                MetadataPropertyHandling = MetadataPropertyHandling.Default
            });
            Assert.AreEqual(true, newDynamicObject.Explicit);

            dynamic d = newDynamicObject;

            Assert.AreEqual(99.9, d.Decimal);
            Assert.AreEqual(1, d.Int);
            Assert.AreEqual(123, d.ChildObject.Integer);

            Assert.AreEqual(2, errors.Count);
            Assert.AreEqual(@"Unexpected end when deserializing object. Path 'ChildObject.Integer', line 6, position 19.", errors[0]);
            Assert.AreEqual(@"Unexpected end when deserializing object. Path 'ChildObject.Integer', line 6, position 19.", errors[1]);
        }
#endif

        [Test]
        public void WriteEndOnPropertyState()
        {
            JsonSerializerSettings settings = new JsonSerializerSettings();
            settings.Error += (obj, args) => { args.ErrorContext.Handled = true; };

            var data = new List<ErrorPerson2>()
            {
                new ErrorPerson2 { FirstName = "Scott", LastName = "Hanselman" },
                new ErrorPerson2 { FirstName = "Scott", LastName = "Hunter" },
                new ErrorPerson2 { FirstName = "Scott", LastName = "Guthrie" },
            };

            Dictionary<string, IEnumerable<IErrorPerson2>> dictionary = data.GroupBy(person => person.FirstName).ToDictionary(group => @group.Key, group => @group.Cast<IErrorPerson2>());
            string output = JsonConvert.SerializeObject(dictionary, Formatting.None, settings);
            Assert.AreEqual(@"{""Scott"":[]}", output);
        }

        [Test]
        public void WriteEndOnPropertyState2()
        {
            JsonSerializerSettings settings = new JsonSerializerSettings();
            settings.Error += (obj, args) => { args.ErrorContext.Handled = true; };

            var data = new List<ErrorPerson2>
            {
                new ErrorPerson2 { FirstName = "Scott", LastName = "Hanselman" },
                new ErrorPerson2 { FirstName = "Scott", LastName = "Hunter" },
                new ErrorPerson2 { FirstName = "Scott", LastName = "Guthrie" },
                new ErrorPerson2 { FirstName = "James", LastName = "Newton-King" },
            };

            Dictionary<string, IEnumerable<IErrorPerson2>> dictionary = data.GroupBy(person => person.FirstName).ToDictionary(group => @group.Key, group => @group.Cast<IErrorPerson2>());
            string output = JsonConvert.SerializeObject(dictionary, Formatting.None, settings);

            Assert.AreEqual(@"{""Scott"":[],""James"":[]}", output);
        }

        [Test]
        public void NoObjectWithEvent()
        {
            string json = "{\"}";
            byte[] byteArray = Encoding.UTF8.GetBytes(json);
            MemoryStream stream = new MemoryStream(byteArray);
            JsonTextReader jReader = new JsonTextReader(new StreamReader(stream));
            JsonSerializer s = new JsonSerializer();
            s.Error += (sender, args) => { args.ErrorContext.Handled = true; };
            ErrorPerson2 obj = s.Deserialize<ErrorPerson2>(jReader);

            Assert.IsNull(obj);
        }

        [Test]
        public void NoObjectWithAttribute()
        {
            string json = "{\"}";
            byte[] byteArray = Encoding.UTF8.GetBytes(json);
            MemoryStream stream = new MemoryStream(byteArray);
            JsonTextReader jReader = new JsonTextReader(new StreamReader(stream));
            JsonSerializer s = new JsonSerializer();

            ExceptionAssert.Throws<JsonReaderException>(() => { ErrorTestObject obj = s.Deserialize<ErrorTestObject>(jReader); }, @"Unterminated string. Expected delimiter: "". Path '', line 1, position 3.");
        }

        public class RootThing
        {
            public Something Something { get; set; }
        }

        public class RootSomethingElse
        {
            public SomethingElse SomethingElse { get; set; }
        }

        /// <summary>
        /// This could be an object we are passing up in an interface.
        /// </summary>
        [JsonConverter(typeof(SomethingConverter))]
        public class Something
        {
            public class SomethingConverter : JsonConverter
            {
                public override bool CanConvert(Type objectType)
                {
                    return true;
                }

                public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
                {
                    try
                    {
                        // Do own stuff.
                        // Then call deserialise for inner object.
                        var innerObject = serializer.Deserialize(reader, typeof(SomethingElse));

                        return null;
                    }
                    catch (Exception ex)
                    {
                        // If we get an error wrap it in something less scary.
                        throw new Exception("An error occurred.", ex);
                    }
                }

                public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
                {
                    try
                    {
                        Something s = (Something)value;

                        // Do own stuff.
                        // Then call serialise for inner object.
                        serializer.Serialize(writer, s.RootSomethingElse);
                    }
                    catch (Exception ex)
                    {
                        // If we get an error wrap it in something less scary.
                        throw new Exception("An error occurred.", ex);
                    }
                }
            }

            public RootSomethingElse RootSomethingElse { get; set; }

            public Something()
            {
                this.RootSomethingElse = new RootSomethingElse();
            }
        }

        /// <summary>
        /// This is an object that is contained in the interface object.
        /// </summary>
        [JsonConverter(typeof(SomethingElseConverter))]
        public class SomethingElse
        {
            public class SomethingElseConverter : JsonConverter
            {
                public override bool CanConvert(Type objectType)
                {
                    return true;
                }

                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)
                {
                    throw new NotImplementedException();
                }
            }

        }

        [Test]
        public void DeserializeWrappingErrorsAndErrorHandling()
        {
            var serialiser = JsonSerializer.Create(new JsonSerializerSettings() { });

            string foo = "{ something: { rootSomethingElse { somethingElse: 0 } } }";
            var reader = new System.IO.StringReader(foo);

            ExceptionAssert.Throws<Exception>(() => { serialiser.Deserialize(reader, typeof(Something)); }, "An error occurred.");
        }

        [Test]
        public void SerializeWrappingErrorsAndErrorHandling()
        {
            var serialiser = JsonSerializer.Create(new JsonSerializerSettings() { });

            Something s = new Something
            {
                RootSomethingElse = new RootSomethingElse
                {
                    SomethingElse = new SomethingElse()
                }
            };
            RootThing r = new RootThing
            {
                Something = s
            };
            
            var writer = new System.IO.StringWriter();

            ExceptionAssert.Throws<Exception>(() => { serialiser.Serialize(writer, r); }, "An error occurred.");
        }

        [Test]
        public void DeserializeRootConverter()
        {
            SomethingElse result = JsonConvert.DeserializeObject<SomethingElse>("{}", new JsonSerializerSettings
            {
                Error = (o, e) => { e.ErrorContext.Handled = true; }
            });

            Assert.IsNull(result);
        }

        [Test]
        public void SerializeRootConverter()
        {
            string result = JsonConvert.SerializeObject(new SomethingElse(), new JsonSerializerSettings
            {
                Error = (o, e) => { e.ErrorContext.Handled = true; }
            });

            Assert.AreEqual(string.Empty, result);
        }
    }

    internal interface IErrorPerson2
    {
    }

    internal class ErrorPerson2 //:IPerson - oops! Forgot to implement the person interface
    {
        public string LastName { get; set; }
        public string FirstName { get; set; }
    }

    public class ThrowingReader : TextReader
    {
        private int _position = 0;
        private static string element = "{\"FirstName\":\"Din\",\"LastName\":\"Rav\",\"Item\":{\"ItemName\":\"temp\"}}";
        private bool _firstRead = true;
        private bool _readComma = false;

        public ThrowingReader()
        {
        }

        public override int Read(char[] buffer, int index, int count)
        {
            char[] temp = new char[buffer.Length];
            int charsRead = 0;
            if (_firstRead)
            {
                charsRead = new StringReader("[").Read(temp, index, count);
                _firstRead = false;
            }
            else
            {
                if (_readComma)
                {
                    charsRead = new StringReader(",").Read(temp, index, count);
                    _readComma = false;
                }
                else
                {
                    charsRead = new StringReader(element).Read(temp, index, count);
                    _readComma = true;
                }
            }

            _position += charsRead;
            if (_position > 65536)
            {
                throw new Exception("too far");
            }
            Array.Copy(temp, index, buffer, index, charsRead);
            return charsRead;
        }
    }

    public class ErrorPerson
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public ErrorItem Item { get; set; }
    }

    public class ErrorItem
    {
        public string ItemName { get; set; }
    }

    [JsonObject]
    public class MyTypeWithRequiredMembers
    {
        [JsonProperty(Required = Required.AllowNull)]
        public string Required1;

        [JsonProperty(Required = Required.AllowNull)]
        public string Required2;
    }

    public class LogMessage
    {
        public string DeviceId { get; set; }
        public IList<LogEvent> Events { get; set; }
    }

    public class LogEvent
    {
        public string Code { get; set; }
        public int Priority { get; set; }
    }

    public class ErrorTestObject
    {
        [OnError]
        internal void OnError(StreamingContext context, ErrorContext errorContext)
        {
        }
    }
}