LinqToJsonTest.cs | searchcode

/lib/Json45r7/Source/Src/Newtonsoft.Json.Tests/Linq/LinqToJsonTest.cs

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C# | 855 lines | 706 code | 90 blank | 59 comment | 4 complexity | 5e39c737e3af516be418c6e1fd608092 MD5 | raw file

#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.Globalization;
#if !NETFX_CORE
using System.IO;
using NUnit.Framework;
#else
using Microsoft.VisualStudio.TestPlatform.UnitTestFramework;
using TestFixture = Microsoft.VisualStudio.TestPlatform.UnitTestFramework.TestClassAttribute;
using Test = Microsoft.VisualStudio.TestPlatform.UnitTestFramework.TestMethodAttribute;
#endif
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json.Tests.Serialization;
using Newtonsoft.Json.Tests.TestObjects;
#if NET20
using Newtonsoft.Json.Utilities.LinqBridge;
#else
using System.Linq;
#endif
using System.IO;

namespace Newtonsoft.Json.Tests.Linq
{
  [TestFixture]
  public class LinqToJsonTest : TestFixtureBase
  {
    [Test]
    public void DoubleValue()
    {
      JArray j = JArray.Parse("[-1E+4,100.0e-2]");

      double value = (double)j[0];
      Assert.AreEqual(-10000d, value);

      value = (double)j[1];
      Assert.AreEqual(1d, value);
    }

    [Test]
    public void Manual()
    {
      JArray array = new JArray();
      JValue text = new JValue("Manual text");
      JValue date = new JValue(new DateTime(2000, 5, 23));

      array.Add(text);
      array.Add(date);

      string json = array.ToString();
      // [
      //   "Manual text",
      //   "\/Date(958996800000+1200)\/"
      // ]
    }

    [Test]
    public void LinqToJsonDeserialize()
    {
      JObject o = new JObject(
        new JProperty("Name", "John Smith"),
        new JProperty("BirthDate", new DateTime(1983, 3, 20))
        );

      JsonSerializer serializer = new JsonSerializer();
      Person p = (Person)serializer.Deserialize(new JTokenReader(o), typeof(Person));

      // John Smith
      Console.WriteLine(p.Name);
    }

    [Test]
    public void ObjectParse()
    {
      string json = @"{
        CPU: 'Intel',
        Drives: [
          'DVD read/writer',
          ""500 gigabyte hard drive""
        ]
      }";

      JObject o = JObject.Parse(json);
      IList<JProperty> properties = o.Properties().ToList();

      Assert.AreEqual("CPU", properties[0].Name);
      Assert.AreEqual("Intel", (string)properties[0].Value);
      Assert.AreEqual("Drives", properties[1].Name);

      JArray list = (JArray)properties[1].Value;
      Assert.AreEqual(2, list.Children().Count());
      Assert.AreEqual("DVD read/writer", (string)list.Children().ElementAt(0));
      Assert.AreEqual("500 gigabyte hard drive", (string)list.Children().ElementAt(1));

      List<object> parameterValues =
        (from p in o.Properties()
         where p.Value is JValue
         select ((JValue)p.Value).Value).ToList();

      Assert.AreEqual(1, parameterValues.Count);
      Assert.AreEqual("Intel", parameterValues[0]);
    }

    [Test]
    public void CreateLongArray()
    {
      string json = @"[0,1,2,3,4,5,6,7,8,9]";

      JArray a = JArray.Parse(json);
      List<int> list = a.Values<int>().ToList();

      List<int> expected = new List<int>() { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CollectionAssert.AreEqual(expected, list);
    }

    [Test]
    public void GoogleSearchAPI()
    {
      #region GoogleJson
      string json = @"{
    results:
        [
            {
                GsearchResultClass:""GwebSearch"",
                unescapedUrl : ""http://www.google.com/"",
                url : ""http://www.google.com/"",
                visibleUrl : ""www.google.com"",
                cacheUrl : 
""http://www.google.com/search?q=cache:zhool8dxBV4J:www.google.com"",
                title : ""Google"",
                titleNoFormatting : ""Google"",
                content : ""Enables users to search the Web, Usenet, and 
images. Features include PageRank,   caching and translation of 
results, and an option to find similar pages.""
            },
            {
                GsearchResultClass:""GwebSearch"",
                unescapedUrl : ""http://news.google.com/"",
                url : ""http://news.google.com/"",
                visibleUrl : ""news.google.com"",
                cacheUrl : 
""http://www.google.com/search?q=cache:Va_XShOz_twJ:news.google.com"",
                title : ""Google News"",
                titleNoFormatting : ""Google News"",
                content : ""Aggregated headlines and a search engine of many of the world's news sources.""
            },
            
            {
                GsearchResultClass:""GwebSearch"",
                unescapedUrl : ""http://groups.google.com/"",
                url : ""http://groups.google.com/"",
                visibleUrl : ""groups.google.com"",
                cacheUrl : 
""http://www.google.com/search?q=cache:x2uPD3hfkn0J:groups.google.com"",
                title : ""Google Groups"",
                titleNoFormatting : ""Google Groups"",
                content : ""Enables users to search and browse the Usenet 
archives which consist of over 700   million messages, and post new 
comments.""
            },
            
            {
                GsearchResultClass:""GwebSearch"",
                unescapedUrl : ""http://maps.google.com/"",
                url : ""http://maps.google.com/"",
                visibleUrl : ""maps.google.com"",
                cacheUrl : 
""http://www.google.com/search?q=cache:dkf5u2twBXIJ:maps.google.com"",
                title : ""Google Maps"",
                titleNoFormatting : ""Google Maps"",
                content : ""Provides directions, interactive maps, and 
satellite/aerial imagery of the United   States. Can also search by 
keyword such as type of business.""
            }
        ],
        
    adResults:
        [
            {
                GsearchResultClass:""GwebSearch.ad"",
                title : ""Gartner Symposium/ITxpo"",
                content1 : ""Meet brilliant Gartner IT analysts"",
                content2 : ""20-23 May 2007- Barcelona, Spain"",
                url : 
""http://www.google.com/url?sa=L&ai=BVualExYGRo3hD5ianAPJvejjD8-s6ye7kdTwArbI4gTAlrECEAEYASDXtMMFOAFQubWAjvr_____AWDXw_4EiAEBmAEAyAEBgAIB&num=1&q=http://www.gartner.com/it/sym/2007/spr8/spr8.jsp%3Fsrc%3D_spain_07_%26WT.srch%3D1&usg=__CxRH06E4Xvm9Muq13S4MgMtnziY="", 

                impressionUrl : 
""http://www.google.com/uds/css/ad-indicator-on.gif?ai=BVualExYGRo3hD5ianAPJvejjD8-s6ye7kdTwArbI4gTAlrECEAEYASDXtMMFOAFQubWAjvr_____AWDXw_4EiAEBmAEAyAEBgAIB"", 

                unescapedUrl : 
""http://www.google.com/url?sa=L&ai=BVualExYGRo3hD5ianAPJvejjD8-s6ye7kdTwArbI4gTAlrECEAEYASDXtMMFOAFQubWAjvr_____AWDXw_4EiAEBmAEAyAEBgAIB&num=1&q=http://www.gartner.com/it/sym/2007/spr8/spr8.jsp%3Fsrc%3D_spain_07_%26WT.srch%3D1&usg=__CxRH06E4Xvm9Muq13S4MgMtnziY="", 

                visibleUrl : ""www.gartner.com""
            }
        ]
}
";
      #endregion

      JObject o = JObject.Parse(json);

      List<JObject> resultObjects = o["results"].Children<JObject>().ToList();

      Assert.AreEqual(32, resultObjects.Properties().Count());

      Assert.AreEqual(32, resultObjects.Cast<JToken>().Values().Count());

      Assert.AreEqual(4, resultObjects.Cast<JToken>().Values("GsearchResultClass").Count());

      Assert.AreEqual(5, o.PropertyValues().Cast<JArray>().Children().Count());

      List<string> resultUrls = o["results"].Children().Values<string>("url").ToList();

      List<string> expectedUrls = new List<string>() { "http://www.google.com/", "http://news.google.com/", "http://groups.google.com/", "http://maps.google.com/" };

      CollectionAssert.AreEqual(expectedUrls, resultUrls);

      List<JToken> descendants = o.Descendants().ToList();
      Assert.AreEqual(89, descendants.Count);
    }

    [Test]
    public void JTokenToString()
    {
      string json = @"{
  CPU: 'Intel',
  Drives: [
    'DVD read/writer',
    ""500 gigabyte hard drive""
  ]
}";

      JObject o = JObject.Parse(json);

      Assert.AreEqual(@"{
  ""CPU"": ""Intel"",
  ""Drives"": [
    ""DVD read/writer"",
    ""500 gigabyte hard drive""
  ]
}", o.ToString());

      JArray list = o.Value<JArray>("Drives");

      Assert.AreEqual(@"[
  ""DVD read/writer"",
  ""500 gigabyte hard drive""
]", list.ToString());

      JProperty cpuProperty = o.Property("CPU");
      Assert.AreEqual(@"""CPU"": ""Intel""", cpuProperty.ToString());

      JProperty drivesProperty = o.Property("Drives");
      Assert.AreEqual(@"""Drives"": [
  ""DVD read/writer"",
  ""500 gigabyte hard drive""
]", drivesProperty.ToString());
    }

    [Test]
    public void JTokenToStringTypes()
    {
      string json = @"{""Color"":2,""Establised"":new Date(1264118400000),""Width"":1.1,""Employees"":999,""RoomsPerFloor"":[1,2,3,4,5,6,7,8,9],""Open"":false,""Symbol"":""@"",""Mottos"":[""Hello World"",""öäüÖÄÜ\\'{new Date(12345);}[222]_µ@²³~"",null,"" ""],""Cost"":100980.1,""Escape"":""\r\n\t\f\b?{\\r\\n\""'"",""product"":[{""Name"":""Rocket"",""ExpiryDate"":new Date(949532490000),""Price"":0},{""Name"":""Alien"",""ExpiryDate"":new Date(-62135596800000),""Price"":0}]}";

      JObject o = JObject.Parse(json);

      Assert.AreEqual(@"""Establised"": new Date(
  1264118400000
)", o.Property("Establised").ToString());
      Assert.AreEqual(@"new Date(
  1264118400000
)", o.Property("Establised").Value.ToString());
      Assert.AreEqual(@"""Width"": 1.1", o.Property("Width").ToString());
      Assert.AreEqual(@"1.1", ((JValue)o.Property("Width").Value).ToString(CultureInfo.InvariantCulture));
      Assert.AreEqual(@"""Open"": false", o.Property("Open").ToString());
      Assert.AreEqual(@"False", o.Property("Open").Value.ToString());

      json = @"[null,undefined]";

      JArray a = JArray.Parse(json);
      Assert.AreEqual(@"[
  null,
  undefined
]", a.ToString());
      Assert.AreEqual(@"", a.Children().ElementAt(0).ToString());
      Assert.AreEqual(@"", a.Children().ElementAt(1).ToString());
    }

    [Test]
    public void CreateJTokenTree()
    {
      JObject o =
        new JObject(
          new JProperty("Test1", "Test1Value"),
          new JProperty("Test2", "Test2Value"),
          new JProperty("Test3", "Test3Value"),
          new JProperty("Test4", null)
        );

      Assert.AreEqual(4, o.Properties().Count());

      Assert.AreEqual(@"{
  ""Test1"": ""Test1Value"",
  ""Test2"": ""Test2Value"",
  ""Test3"": ""Test3Value"",
  ""Test4"": null
}", o.ToString());

      JArray a =
        new JArray(
          o,
          new DateTime(2000, 10, 10, 0, 0, 0, DateTimeKind.Utc),
          55,
          new JArray(
            "1",
            2,
            3.0,
            new DateTime(4, 5, 6, 7, 8, 9, DateTimeKind.Utc)
          ),
          new JConstructor(
            "ConstructorName",
            "param1",
            2,
            3.0
          )
        );

      Assert.AreEqual(5, a.Count());
      Assert.AreEqual(@"[
  {
    ""Test1"": ""Test1Value"",
    ""Test2"": ""Test2Value"",
    ""Test3"": ""Test3Value"",
    ""Test4"": null
  },
  ""2000-10-10T00:00:00Z"",
  55,
  [
    ""1"",
    2,
    3.0,
    ""0004-05-06T07:08:09Z""
  ],
  new ConstructorName(
    ""param1"",
    2,
    3.0
  )
]", a.ToString());
    }

    private class Post
    {
      public string Title { get; set; }
      public string Description { get; set; }
      public string Link { get; set; }
      public IList<string> Categories { get; set; }
    }

    private List<Post> GetPosts()
    {
      return new List<Post>()
      {
        new Post()
        {
          Title = "LINQ to JSON beta",
          Description = "Annoucing LINQ to JSON",
          Link = "http://james.newtonking.com/projects/json-net.aspx",
          Categories = new List<string>() { "Json.NET", "LINQ" }
        },
        new Post()
        {
          Title = "Json.NET 1.3 + New license + Now on CodePlex",
          Description = "Annoucing the release of Json.NET 1.3, the MIT license and the source being available on CodePlex",
          Link = "http://james.newtonking.com/projects/json-net.aspx",
          Categories = new List<string>() { "Json.NET", "CodePlex" }
        }
      };
    }

    [Test]
    public void CreateJTokenTreeNested()
    {
      List<Post> posts = GetPosts();

      JObject rss =
        new JObject(
          new JProperty("channel",
            new JObject(
              new JProperty("title", "James Newton-King"),
              new JProperty("link", "http://james.newtonking.com"),
              new JProperty("description", "James Newton-King's blog."),
              new JProperty("item",
                new JArray(
                  from p in posts
                  orderby p.Title
                  select new JObject(
                    new JProperty("title", p.Title),
                    new JProperty("description", p.Description),
                    new JProperty("link", p.Link),
                    new JProperty("category",
                      new JArray(
                        from c in p.Categories
                        select new JValue(c)))))))));

      Console.WriteLine(rss.ToString());

      //{
      //  "channel": {
      //    "title": "James Newton-King",
      //    "link": "http://james.newtonking.com",
      //    "description": "James Newton-King's blog.",
      //    "item": [
      //      {
      //        "title": "Json.NET 1.3 + New license + Now on CodePlex",
      //        "description": "Annoucing the release of Json.NET 1.3, the MIT license and the source being available on CodePlex",
      //        "link": "http://james.newtonking.com/projects/json-net.aspx",
      //        "category": [
      //          "Json.NET",
      //          "CodePlex"
      //        ]
      //      },
      //      {
      //        "title": "LINQ to JSON beta",
      //        "description": "Annoucing LINQ to JSON",
      //        "link": "http://james.newtonking.com/projects/json-net.aspx",
      //        "category": [
      //          "Json.NET",
      //          "LINQ"
      //        ]
      //      }
      //    ]
      //  }
      //}

      var postTitles =
        from p in rss["channel"]["item"]
        select p.Value<string>("title");

      foreach (var item in postTitles)
      {
        Console.WriteLine(item);
      }

      //LINQ to JSON beta
      //Json.NET 1.3 + New license + Now on CodePlex

      var categories =
        from c in rss["channel"]["item"].Children()["category"].Values<string>()
        group c by c into g
        orderby g.Count() descending
        select new { Category = g.Key, Count = g.Count() };

      foreach (var c in categories)
      {
        Console.WriteLine(c.Category + " - Count: " + c.Count);
      }

      //Json.NET - Count: 2
      //LINQ - Count: 1
      //CodePlex - Count: 1
    }

    [Test]
    public void BasicQuerying()
    {
      string json = @"{
                        ""channel"": {
                          ""title"": ""James Newton-King"",
                          ""link"": ""http://james.newtonking.com"",
                          ""description"": ""James Newton-King's blog."",
                          ""item"": [
                            {
                              ""title"": ""Json.NET 1.3 + New license + Now on CodePlex"",
                              ""description"": ""Annoucing the release of Json.NET 1.3, the MIT license and the source being available on CodePlex"",
                              ""link"": ""http://james.newtonking.com/projects/json-net.aspx"",
                              ""category"": [
                                ""Json.NET"",
                                ""CodePlex""
                              ]
                            },
                            {
                              ""title"": ""LINQ to JSON beta"",
                              ""description"": ""Annoucing LINQ to JSON"",
                              ""link"": ""http://james.newtonking.com/projects/json-net.aspx"",
                              ""category"": [
                                ""Json.NET"",
                                ""LINQ""
                              ]
                            }
                          ]
                        }
                      }";

      JObject o = JObject.Parse(json);

      Assert.AreEqual(null, o["purple"]);
      Assert.AreEqual(null, o.Value<string>("purple"));

      CustomAssert.IsInstanceOfType(typeof(JArray), o["channel"]["item"]);

      Assert.AreEqual(2, o["channel"]["item"].Children()["title"].Count());
      Assert.AreEqual(0, o["channel"]["item"].Children()["monkey"].Count());

      Assert.AreEqual("Json.NET 1.3 + New license + Now on CodePlex", (string)o["channel"]["item"][0]["title"]);

      CollectionAssert.AreEqual(new string[] { "Json.NET 1.3 + New license + Now on CodePlex", "LINQ to JSON beta" }, o["channel"]["item"].Children().Values<string>("title").ToArray());
    }

    [Test]
    public void JObjectIntIndex()
    {
      ExceptionAssert.Throws<ArgumentException>("Accessed JObject values with invalid key value: 0. Object property name expected.",
      () =>
      {
        JObject o = new JObject();
        Assert.AreEqual(null, o[0]);
      });
    }

    [Test]
    public void JArrayStringIndex()
    {
      ExceptionAssert.Throws<ArgumentException>(@"Accessed JArray values with invalid key value: ""purple"". Array position index expected.",
      () =>
      {
        JArray a = new JArray();
        Assert.AreEqual(null, a["purple"]);
      });
    }

    [Test]
    public void JConstructorStringIndex()
    {
      ExceptionAssert.Throws<ArgumentException>(@"Accessed JConstructor values with invalid key value: ""purple"". Argument position index expected.",
      () =>
      {
        JConstructor c = new JConstructor("ConstructorValue");
        Assert.AreEqual(null, c["purple"]);
      });
    }

#if !PocketPC && !NET20
    [Test]
    public void ToStringJsonConverter()
    {
      JObject o =
        new JObject(
          new JProperty("Test1", new DateTime(2000, 10, 15, 5, 5, 5, DateTimeKind.Utc)),
          new JProperty("Test2", new DateTimeOffset(2000, 10, 15, 5, 5, 5, new TimeSpan(11, 11, 0))),
          new JProperty("Test3", "Test3Value"),
          new JProperty("Test4", null)
        );

      JsonSerializer serializer = new JsonSerializer();
      serializer.Converters.Add(new JavaScriptDateTimeConverter());
      StringWriter sw = new StringWriter();
      JsonWriter writer = new JsonTextWriter(sw);
      writer.Formatting = Formatting.Indented;
      serializer.Serialize(writer, o);

      string json = sw.ToString();

      Assert.AreEqual(@"{
  ""Test1"": new Date(
    971586305000
  ),
  ""Test2"": new Date(
    971546045000
  ),
  ""Test3"": ""Test3Value"",
  ""Test4"": null
}", json);
    }

    [Test]
    public void DateTimeOffset()
    {
      List<DateTimeOffset> testDates = new List<DateTimeOffset> {
        new DateTimeOffset(new DateTime(100, 1, 1, 1, 1, 1, DateTimeKind.Utc)),
        new DateTimeOffset(2000, 1, 1, 1, 1, 1, TimeSpan.Zero),
        new DateTimeOffset(2000, 1, 1, 1, 1, 1, TimeSpan.FromHours(13)),
        new DateTimeOffset(2000, 1, 1, 1, 1, 1, TimeSpan.FromHours(-3.5)),
      };

      JsonSerializer jsonSerializer = new JsonSerializer();

      JTokenWriter jsonWriter;
      using (jsonWriter = new JTokenWriter())
      {
        jsonSerializer.Serialize(jsonWriter, testDates);
      }

      Assert.AreEqual(4, jsonWriter.Token.Children().Count());
    }
#endif

    [Test]
    public void FromObject()
    {
      List<Post> posts = GetPosts();

      JObject o = JObject.FromObject(new
      {
        channel = new
        {
          title = "James Newton-King",
          link = "http://james.newtonking.com",
          description = "James Newton-King's blog.",
          item =
              from p in posts
              orderby p.Title
              select new
              {
                title = p.Title,
                description = p.Description,
                link = p.Link,
                category = p.Categories
              }
        }
      });

      Console.WriteLine(o.ToString());
      CustomAssert.IsInstanceOfType(typeof(JObject), o);
      CustomAssert.IsInstanceOfType(typeof(JObject), o["channel"]);
      Assert.AreEqual("James Newton-King", (string)o["channel"]["title"]);
      Assert.AreEqual(2, o["channel"]["item"].Children().Count());

      JArray a = JArray.FromObject(new List<int>() { 0, 1, 2, 3, 4 });
      CustomAssert.IsInstanceOfType(typeof(JArray), a);
      Assert.AreEqual(5, a.Count());
    }

    [Test]
    public void FromAnonDictionary()
    {
      List<Post> posts = GetPosts();

      JObject o = JObject.FromObject(new
      {
        channel = new Dictionary<string, object>
        {
          { "title", "James Newton-King" },
          { "link", "http://james.newtonking.com" },
          { "description", "James Newton-King's blog." },
          { "item", 
                  (from p in posts
                  orderby p.Title
                  select new
                  {
                    title = p.Title,
                    description = p.Description,
                    link = p.Link,
                    category = p.Categories
                  })
          }
        }
      });

      Console.WriteLine(o.ToString());
      CustomAssert.IsInstanceOfType(typeof(JObject), o);
      CustomAssert.IsInstanceOfType(typeof(JObject), o["channel"]);
      Assert.AreEqual("James Newton-King", (string)o["channel"]["title"]);
      Assert.AreEqual(2, o["channel"]["item"].Children().Count());

      JArray a = JArray.FromObject(new List<int>() { 0, 1, 2, 3, 4 });
      CustomAssert.IsInstanceOfType(typeof(JArray), a);
      Assert.AreEqual(5, a.Count());
    }

    [Test]
    public void AsJEnumerable()
    {
      JObject o = null;
      IJEnumerable<JToken> enumerable = null;

      enumerable = o.AsJEnumerable();
      Assert.IsNull(enumerable);
    
      o =
        new JObject(
          new JProperty("Test1", new DateTime(2000, 10, 15, 5, 5, 5, DateTimeKind.Utc)),
          new JProperty("Test2", "Test2Value"),
          new JProperty("Test3", null)
        );

      enumerable = o.AsJEnumerable();
      Assert.IsNotNull(enumerable);
      Assert.AreEqual(o, enumerable);

      DateTime d = enumerable["Test1"].Value<DateTime>();

      Assert.AreEqual(new DateTime(2000, 10, 15, 5, 5, 5, DateTimeKind.Utc), d);
    }

#if !(NET20 || NET35 || SILVERLIGHT || PORTABLE)
    [Test]
    public void CovariantIJEnumerable()
    {
      IEnumerable<JObject> o = new[]
        {
          JObject.FromObject(new {First = 1, Second = 2}),
          JObject.FromObject(new {First = 1, Second = 2})
        };

      IJEnumerable<JToken> values = o.Properties();
      Assert.AreEqual(4, values.Count());
    }
#endif

    [Test]
    public void ChildrenExtension()
    {
      string json = @"[
                        {
                          ""title"": ""James Newton-King"",
                          ""link"": ""http://james.newtonking.com"",
                          ""description"": ""James Newton-King's blog."",
                          ""item"": [
                            {
                              ""title"": ""Json.NET 1.3 + New license + Now on CodePlex"",
                              ""description"": ""Annoucing the release of Json.NET 1.3, the MIT license and the source being available on CodePlex"",
                              ""link"": ""http://james.newtonking.com/projects/json-net.aspx"",
                              ""category"": [
                                ""Json.NET"",
                                ""CodePlex""
                              ]
                            },
                            {
                              ""title"": ""LINQ to JSON beta"",
                              ""description"": ""Annoucing LINQ to JSON"",
                              ""link"": ""http://james.newtonking.com/projects/json-net.aspx"",
                              ""category"": [
                                ""Json.NET"",
                                ""LINQ""
                              ]
                            }
                          ]
                        },
                        {
                          ""title"": ""James Newton-King"",
                          ""link"": ""http://james.newtonking.com"",
                          ""description"": ""James Newton-King's blog."",
                          ""item"": [
                            {
                              ""title"": ""Json.NET 1.3 + New license + Now on CodePlex"",
                              ""description"": ""Annoucing the release of Json.NET 1.3, the MIT license and the source being available on CodePlex"",
                              ""link"": ""http://james.newtonking.com/projects/json-net.aspx"",
                              ""category"": [
                                ""Json.NET"",
                                ""CodePlex""
                              ]
                            },
                            {
                              ""title"": ""LINQ to JSON beta"",
                              ""description"": ""Annoucing LINQ to JSON"",
                              ""link"": ""http://james.newtonking.com/projects/json-net.aspx"",
                              ""category"": [
                                ""Json.NET"",
                                ""LINQ""
                              ]
                            }
                          ]
                        }
                      ]";

      JArray o = JArray.Parse(json);

      Assert.AreEqual(4, o.Children()["item"].Children()["title"].Count());
      CollectionAssert.AreEqual(new string[]
        {
          "Json.NET 1.3 + New license + Now on CodePlex",
          "LINQ to JSON beta",
          "Json.NET 1.3 + New license + Now on CodePlex",
          "LINQ to JSON beta"
        },
        o.Children()["item"].Children()["title"].Values<string>().ToArray());
    }

    public void UriGuidTimeSpanTestClassEmptyTest()
    {
      UriGuidTimeSpanTestClass c1 = new UriGuidTimeSpanTestClass();
      JObject o = JObject.FromObject(c1);

      Assert.AreEqual(@"{
  ""Guid"": ""00000000-0000-0000-0000-000000000000"",
  ""NullableGuid"": null,
  ""TimeSpan"": ""00:00:00"",
  ""NullableTimeSpan"": null,
  ""Uri"": null
}", o.ToString());

      UriGuidTimeSpanTestClass c2 = o.ToObject<UriGuidTimeSpanTestClass>();
      Assert.AreEqual(c1.Guid, c2.Guid);
      Assert.AreEqual(c1.NullableGuid, c2.NullableGuid);
      Assert.AreEqual(c1.TimeSpan, c2.TimeSpan);
      Assert.AreEqual(c1.NullableTimeSpan, c2.NullableTimeSpan);
      Assert.AreEqual(c1.Uri, c2.Uri);
    }

    public void UriGuidTimeSpanTestClassValuesTest()
    {
      UriGuidTimeSpanTestClass c1 = new UriGuidTimeSpanTestClass
      {
        Guid = new Guid("1924129C-F7E0-40F3-9607-9939C531395A"),
        NullableGuid = new Guid("9E9F3ADF-E017-4F72-91E0-617EBE85967D"),
        TimeSpan = TimeSpan.FromDays(1),
        NullableTimeSpan = TimeSpan.FromHours(1),
        Uri = new Uri("http://testuri.com")
      };
      JObject o = JObject.FromObject(c1);

      Assert.AreEqual(@"{
  ""Guid"": ""1924129c-f7e0-40f3-9607-9939c531395a"",
  ""NullableGuid"": ""9e9f3adf-e017-4f72-91e0-617ebe85967d"",
  ""TimeSpan"": ""1.00:00:00"",
  ""NullableTimeSpan"": ""01:00:00"",
  ""Uri"": ""http://testuri.com/""
}", o.ToString());

      UriGuidTimeSpanTestClass c2 = o.ToObject<UriGuidTimeSpanTestClass>();
      Assert.AreEqual(c1.Guid, c2.Guid);
      Assert.AreEqual(c1.NullableGuid, c2.NullableGuid);
      Assert.AreEqual(c1.TimeSpan, c2.TimeSpan);
      Assert.AreEqual(c1.NullableTimeSpan, c2.NullableTimeSpan);
      Assert.AreEqual(c1.Uri, c2.Uri);
    }
  }
}