Question

Let say you have a register action in your controller.

    [HttpPost]
    public ViewResult Register(string username, string email, string password, string repeatPassword)

This action will:

1. Check and validate parameters
2. Communicate and add a new data to
   repository
3. Return a View.

Definitely need to unit test 1 and 3, but how about 2?
Is there any way to unit test 2 without having to implement the add method in the repository?

Thanks,

RWendi

Answer 1

Your test for #2 using Moq would be:

[Test]
public void UserIsAddedToRepository()
{
    // arrange
    var username = "user1";
    var email = "email@address";
    var password = "password";
    var controller = new LoginController();
    var mockUserRepo = new Mock<IUserRepo>();
    mockUserRepo.Setup(m => m.AddNewUser(username, email, password));

    // act
    controller.Register(username, email, password, "");

    // assert
    mockUserRepo.Verify(m => m.AddNewUser(username, email, password));
}

Moq’s Verify will behave like NUnit Assert and will fail the test if the expected method is not called.