'Trying to use an email address as a username fails, with a
message saying an email address can\'t be used as a username.'

def test_email_username(self):

    bad_usernames = ('testuser@example.com', '@testuser')
    adapter = KumaAccountAdapter()
    for username in bad_usernames:
        self.assertRaisesMessage(forms.ValidationError, USERNAME_EMAIL, adapter.clean_username, username)
