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bpo-27683: Fix a regression for host() of ipaddress network objects (GH-6016)

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The result of host() was not empty when the network is constructed by a tuple containing an
integer mask and only 1 bit left for addresses.
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Xiang Zhang 2018-03-21 08:25:13 +08:00 • committed by GitHub
parent 5609b78392
commit 10b134a07c
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4 changed files with 73 additions and 73 deletions
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26
Lib/test/test_ipaddress.py
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@ -1127,10 +1127,30 @@ class IpaddrUnitTest(unittest.TestCase):
self.assertEqual(ipaddress.IPv4Address('1.2.3.1'), hosts[0])
self.assertEqual(ipaddress.IPv4Address('1.2.3.254'), hosts[-1])
ipv6_network = ipaddress.IPv6Network('2001:658:22a:cafe::/120')
hosts = list(ipv6_network.hosts())
self.assertEqual(255, len(hosts))
self.assertEqual(ipaddress.IPv6Address('2001:658:22a:cafe::1'), hosts[0])
self.assertEqual(ipaddress.IPv6Address('2001:658:22a:cafe::ff'), hosts[-1])
# special case where only 1 bit is left for address
self.assertEqual([ipaddress.IPv4Address('2.0.0.0'),
ipaddress.IPv4Address('2.0.0.1')],
list(ipaddress.ip_network('2.0.0.0/31').hosts()))
addrs = [ipaddress.IPv4Address('2.0.0.0'),
ipaddress.IPv4Address('2.0.0.1')]
str_args = '2.0.0.0/31'
tpl_args = ('2.0.0.0', 31)
self.assertEqual(addrs, list(ipaddress.ip_network(str_args).hosts()))
self.assertEqual(addrs, list(ipaddress.ip_network(tpl_args).hosts()))
self.assertEqual(list(ipaddress.ip_network(str_args).hosts()),
list(ipaddress.ip_network(tpl_args).hosts()))
addrs = [ipaddress.IPv6Address('2001:658:22a:cafe::'),
ipaddress.IPv6Address('2001:658:22a:cafe::1')]
str_args = '2001:658:22a:cafe::/127'
tpl_args = ('2001:658:22a:cafe::', 127)
self.assertEqual(addrs, list(ipaddress.ip_network(str_args).hosts()))
self.assertEqual(addrs, list(ipaddress.ip_network(tpl_args).hosts()))
self.assertEqual(list(ipaddress.ip_network(str_args).hosts()),
list(ipaddress.ip_network(tpl_args).hosts()))
def testFancySubnetting(self):
self.assertEqual(sorted(self.ipv4_network.subnets(prefixlen_diff=3)),