'When constructed using L{SecondaryAuthority.__init__}, the default port
of 53 is used.'

def test_defaultPort(self):

    secondary = SecondaryAuthority('192.168.1.1', 'inside.com')
    self.assertEqual(secondary.primary, '192.168.1.1')
    self.assertEqual(secondary._port, 53)
    self.assertEqual(secondary.domain, 'inside.com')
