public void AuthenticationLogoutShouldClearSessionAndSingout()
{
ISessionHelper session = MockRepository.GenerateStub <ISessionHelper>();
IFormsAuthentication forms = MockRepository.GenerateStub <IFormsAuthentication>();
Authenticator authenticator = new Authenticator(null, session, forms);
authenticator.Logout();
session.AssertWasCalled(s => s.Clear());
forms.AssertWasCalled(f => f.SignOut());
}