def flushTags(self):
        self._tags = []
test that a registration should fail with a nonexistant mode
dataset/ETHPy150Open jookies/jasmin/jasmin/routing/Routables.py/Routable.flushTags--crossover with--dataset/ETHPy150Open deis/deis/controller/api/tests/test_auth.py/AuthTest.test_auth_registration_fails_with_nonexistant_mode