'An argument of the form C{"ip:port/domain"} can be used to specify an
alternate port number for which to act as a secondary.'

def test_secondaryExplicitPort(self):

    options = Options()
    options.parseOptions(['--secondary', '1.2.3.4:5353/example.com'])
    self.assertEqual([(('1.2.3.4', 5353), ['example.com'])], options.secondaries)
