Многослойное электронное письмо

я закончил с этой спецификацией

public abstract class Specification <C> where C: Controller
{
    protected C controller;

    HttpContextBase mockHttpContext;
    HttpRequestBase mockRequest;

    protected Exception ExceptionThrown { get; private set; }

    [SetUp]
    public void Setup()
    {
        mockHttpContext = MockRepository.GenerateMock<HttpContextBase>();
        mockRequest = MockRepository.GenerateMock<HttpRequestBase>();

        mockHttpContext.Stub(x => x.Request).Return(mockRequest);
        mockRequest.Stub(x => x.HttpMethod).Return("GET");


        EstablishContext();
        SetHttpContext();

        try
        {
            When();
        }
        catch (Exception exc)
        {
            ExceptionThrown = exc;
        }
    }

    protected void SetHttpContext()
    {
        var context = new ControllerContext(mockHttpContext, new RouteData(), controller);
        controller.ControllerContext = context;
    }

    protected T Mock<T>() where T: class
    {
        return MockRepository.GenerateMock<T>();
    }

    protected abstract void EstablishContext();
    protected abstract void When();

    [TearDown]
    public virtual void TearDown()
    {
    }
} 

, и сок здесь

[TestFixture]
public class When_invoking_ManageUsersControllers_Update :Specification   <ManageUsersController>
{
    private IUserRepository userRepository;
    FormCollection form;

    ActionResult result;
    User retUser;

    protected override void EstablishContext()
    {
        userRepository = Mock<IUserRepository>();
        controller = new ManageUsersController(userRepository);

        retUser = new User();
        userRepository.Expect(x => x.GetById(5)).Return(retUser);
        userRepository.Expect(x => x.Update(retUser));

        form = new FormCollection();
        form["IdUser"] = 5.ToString();
        form["Name"] = 5.ToString();
        form["Surename"] = 5.ToString();
        form["Login"] = 5.ToString();
        form["Password"] = 5.ToString();
    }

    protected override void When()
    {
        result = controller.Edit(5, form);
    }

    [Test]
    public void is_retrieved_before_update_original_user()
    {
        userRepository.AssertWasCalled(x => x.GetById(5));
        userRepository.AssertWasCalled(x => x.Update(retUser));
    }
}

, обладают