def tearDown(self):
        super(SimpleInstanceTest, self).tearDown()
        CONF.network_label_regex = self.orig_conf
        CONF.ip_start = None
def test_regex_flags_bad_input():
    cases = (
        'abcd',
        'ABCabc'
    )

    case_sensitive = inputs.regex(r'^[A-Z]+$')

    for value in cases:
        yield assert_raises, ValueError, lambda: case_sensitive(value)