'Tests for anonymous_user_id method to return None if user is Non-Staff.'

def test_get_anonymous_user_id_returns_none_for_non_staff_users(self):

    django_user_service = DjangoXBlockUserService(self.user, user_is_staff=False)
    anonymous_user_id = django_user_service.get_anonymous_user_id(username=self.user.username, course_id='edx/toy/2012_Fall')
    self.assertIsNone(anonymous_user_id)
