Habanero.Smooth.Test.DummyTypeSourceWithMockItems.GetTypes C# (CSharp) Method

        public IEnumerable<TypeWrapper> GetTypes()
        {
            return _typeWrappers;
        }

 public void Test_GetTypes_WhenAddToTypeSource_ShouldReturnAllTypesImplementingIBoInterface()
 {
     //---------------Set up test pack-------------------
     var typeSource = new DummyTypeSourceWithMockItems();
     IEnumerable<TypeWrapper> types1 = typeSource.GetTypes();
     var typeSource2 = new DummyTypeSourceWithMockItems(1);
     IEnumerable<TypeWrapper> types2 = typeSource2.GetTypes();
     var multiTypeSource = new MultiTypeSource(new []{typeSource});
     //---------------Assert Precondition----------------
     multiTypeSource.GetTypes().ShouldHaveCount(4, "The firstType Should be loaded");
     //---------------Execute Test ----------------------
     multiTypeSource.TypeSources.Add(typeSource2);
     var types = multiTypeSource.GetTypes();
     //---------------Test Result -----------------------
     Assert.IsNotNull(types);
     types.ShouldHaveCount(types1.Count() + types2.Count());
     types.ShouldContain(types1, "Should Contain all Items in Type One");
     types.ShouldContain(types2, "Should Contain all Items in Type Two");
 }