test_ipaddress.py 文件源码

def testZeroNetmask(self):
        ipv4_zero_netmask = ipaddress.IPv4Interface('1.2.3.4/0')
        self.assertEqual(int(ipv4_zero_netmask.network.netmask), 0)
        self.assertEqual(ipv4_zero_netmask._prefix_from_prefix_string('0'), 0)
        self.assertTrue(ipv4_zero_netmask._is_valid_netmask('0'))
        self.assertTrue(ipv4_zero_netmask._is_valid_netmask('0.0.0.0'))
        self.assertFalse(ipv4_zero_netmask._is_valid_netmask('invalid'))

        ipv6_zero_netmask = ipaddress.IPv6Interface('::1/0')
        self.assertEqual(int(ipv6_zero_netmask.network.netmask), 0)
        self.assertEqual(ipv6_zero_netmask._prefix_from_prefix_string('0'), 0)