Rhino Mocks - Arrange, Act, Assert Syntax
time to read 3 min | 432 words

I intend to release the new version of Rhino Mocks soon, and I wanted to show the new syntax that I have been working on. I still need to write more thorough documentation, but I think that just the syntax should be a pretty good indication of how things are going.

Without further ado, here is the code:

[Test]
public void WhenUserForgetPasswordWillSendNotification_WithConstraints()
{
    var userRepository = MockRepository.GenerateStub<IUserRepository>();
    var notificationSender = MockRepository.GenerateStub<INotificationSender>();

    userRepository.Stub(x => x.GetUserById(5)).Return(new User { Id = 5, Name = "ayende" });

    new LoginController(userRepository, notificationSender).ForgotMyPassword(5);

    notificationSender.AssertWasCalled(x => x.Send(null),
        options => options.Constraints(Text.StartsWith("Changed")));
}

[Test]
public void WhenUserForgetPasswordWillSendNotification_WithArgMatchingInTheLambda()
{
    var userRepository = MockRepository.GenerateStub<IUserRepository>();
    var notificationSender = MockRepository.GenerateStub<INotificationSender>();

    userRepository.Stub(x => x.GetUserById(5)).Return(new User { Id = 5, Name = "ayende" });

    new LoginController(userRepository, notificationSender).ForgotMyPassword(5);

    notificationSender.AssertWasCalled(x => x.Send(Arg<string>.Matches(s => s.StartsWith("Changed"))));
}

[Test]
public void WhenUserForgetPasswordWillSendNotification_WithArgumentMatching()
{
    var userRepository = MockRepository.GenerateStub<IUserRepository>();
    var notificationSender = MockRepository.GenerateStub<INotificationSender>();

    userRepository.Stub(x => x.GetUserById(5)).Return(new User { Id = 5, Name = "ayende" });

    new LoginController(userRepository, notificationSender).ForgotMyPassword(5);

    notificationSender.AssertWasCalled(x => x.Send("Changed password for ayende"));
}


[Test]
public void WhenUserForgetPasswordWillSendNotification_UsingExpect()
{
    var userRepository = MockRepository.GenerateStub<IUserRepository>();
    var notificationSender = MockRepository.GenerateMock<INotificationSender>();

    userRepository.Stub(x => x.GetUserById(5)).Return(new User { Id = 5, Name = "ayende" });
    notificationSender.Expect(x => x.Send(null)).Constraints(Text.StartsWith("Changed"));

    new LoginController(userRepository, notificationSender).ForgotMyPassword(5);

    notificationSender.VerifyAllExpectations();
}

The class under test is:

public class LoginController
{
    private readonly IUserRepository repository;
    private readonly INotificationSender sender;

    public LoginController(IUserRepository repository, INotificationSender sender)
    {
        this.repository = repository;
        this.sender = sender;
    }

    public void ForgotMyPassword(int userId)
    {
        User user = repository.GetUserById(userId);
        sender.Send("Changed password for " + user.Name);
    }
}
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