def _mails(self, users_and_watches):
        # Did this instead of mail() because a common case might be sending the
        # same mail to many users. mail() would make it difficult to avoid
        # redoing the templating every time.
        raise NotImplementedError
Test form validation
dataset/ETHPy150Open mozilla/django-tidings/tidings/events.py/Event._mails--crossover with--dataset/ETHPy150Open eugenkiss/Simblin/test/test_views.py/TestRegistration.test_validation