def METHOD_NAME(self):
    # Test with no username
    no_username_phone_number = "+99912345678"
    incoming(no_username_phone_number, 'JOIN {} WORKER'.format(self.domain), self.backend.hq_api_id)
    self.assertIsNotNone(CommCareUser.get_by_username(
        format_username(strip_plus(no_username_phone_number), self.domain)
    ))