public async void AuthenticatorLoginShouldNotLoginWhenServiceReturnsNull()
{
User user = null;
LoginAttempt attempt = new LoginAttempt(user);
LoginModel model = new LoginModel();
model.Login = "******";
model.Password = "******";
ILoginService service = MockRepository.GenerateStub <ILoginService>();
ISessionHelper session = MockRepository.GenerateStub <ISessionHelper>();
IFormsAuthentication forms = MockRepository.GenerateStub <IFormsAuthentication>();
service.Stub(s => s.Login(model.Login, model.Password)).Return(Task <LoginAttempt> .FromResult(attempt));
Authenticator authenticator = new Authenticator(service, session, forms);
bool result = await authenticator.Login(model);
Assert.IsFalse(result);
service.AssertWasCalled(s => s.Login(model.Login, model.Password));
session.AssertWasNotCalled(s => s.User.Id);
forms.AssertWasNotCalled(f => f.SetAuthCookie(Arg <string> .Is.Anything, Arg <bool> .Is.Anything));
}