PolymorphicInstanceTest.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using NUnit.Framework;
using ServiceStack.Text.Common;

namespace ServiceStack.Text.Tests.JsonTests
{
	[TestFixture]
	public class PolymorphicInstanceTest 
	{

		[SetUp]
		public void SetUp()
		{
			JsConfig.Reset();
			JsConfig<ICat>.ExcludeTypeInfo = false;
		}

		[Test]
		public void Can_deserialise_polymorphic_dog_exact()
		{
			var dog =
				JsonSerializer.DeserializeFromString<Dog>(
					@"{""__type"":"""
					+ typeof(Dog).ToTypeString()
					+ @""",""Name"":""Fido""}");

			Assert.That(dog.Name, Is.EqualTo(@"Fido"));

		}

		[Test]
		public void Can_deserialise_polymorphic_list_exact_with_no_side_effect_for_bad_type_position()
		{
			var dog =
				JsonSerializer.DeserializeFromString<Dog>(
					@"{""Name"":""Fido"",""__type"":"""
					+ typeof(Dog).ToTypeString() + @"""}");

			Assert.That(dog.Name, Is.EqualTo(@"Fido"));

		}

        [Test]
	    public void Should_not_even_instantiate_incorrect_type()
	    {
            var json = @"{""__type"":"""
                           + typeof(TestClass).ToTypeString() + @""", ""Name"":""Fido""}";
            var dog = JsonSerializer.DeserializeFromString<Dog>(

                    json);

            Assert.IsFalse(TestClass.Called);
	    }

	    public class TestClass 
	    {
            public static bool Called { get; set; }

	        public TestClass()
	        {
	            Called = true;
	        }
	    }

	}
}