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Issue #26457: Fixed the subnets() methods in IP network classes for the case

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when resulting prefix length is equal to maximal prefix length.
Based on patch by Xiang Zhang.
This commit is contained in:
Serhiy Storchaka 2016-03-01 10:25:45 +02:00
parent 5f582bdec8
commit bb0dbd583b
3 changed files with 43 additions and 9 deletions
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30
Lib/test/test_ipaddress.py
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@ -1066,6 +1066,26 @@ class IpaddrUnitTest(unittest.TestCase):
'2001:658:22a:cafe:8000::/66',
'2001:658:22a:cafe:c000::/66'])
def testGetSubnets3(self):
subnets = [str(x) for x in self.ipv4_network.subnets(8)]
self.assertEqual(subnets[:3],
['1.2.3.0/32', '1.2.3.1/32', '1.2.3.2/32'])
self.assertEqual(subnets[-3:],
['1.2.3.253/32', '1.2.3.254/32', '1.2.3.255/32'])
self.assertEqual(len(subnets), 256)
ipv6_network = ipaddress.IPv6Network('2001:658:22a:cafe::/120')
subnets = [str(x) for x in ipv6_network.subnets(8)]
self.assertEqual(subnets[:3],
['2001:658:22a:cafe::/128',
'2001:658:22a:cafe::1/128',
'2001:658:22a:cafe::2/128'])
self.assertEqual(subnets[-3:],
['2001:658:22a:cafe::fd/128',
'2001:658:22a:cafe::fe/128',
'2001:658:22a:cafe::ff/128'])
self.assertEqual(len(subnets), 256)
def testSubnetFailsForLargeCidrDiff(self):
self.assertRaises(ValueError, list,
self.ipv4_interface.network.subnets(9))
@ -1670,6 +1690,7 @@ class IpaddrUnitTest(unittest.TestCase):
addr3 = ipaddress.ip_network('10.2.1.0/24')
addr4 = ipaddress.ip_address('10.1.1.0')
addr5 = ipaddress.ip_network('2001:db8::0/32')
addr6 = ipaddress.ip_network('10.1.1.5/32')
self.assertEqual(sorted(list(addr1.address_exclude(addr2))),
[ipaddress.ip_network('10.1.1.64/26'),
ipaddress.ip_network('10.1.1.128/25')])
@ -1677,6 +1698,15 @@ class IpaddrUnitTest(unittest.TestCase):
self.assertRaises(TypeError, list, addr1.address_exclude(addr4))
self.assertRaises(TypeError, list, addr1.address_exclude(addr5))
self.assertEqual(list(addr1.address_exclude(addr1)), [])
self.assertEqual(sorted(list(addr1.address_exclude(addr6))),
[ipaddress.ip_network('10.1.1.0/30'),
ipaddress.ip_network('10.1.1.4/32'),
ipaddress.ip_network('10.1.1.6/31'),
ipaddress.ip_network('10.1.1.8/29'),
ipaddress.ip_network('10.1.1.16/28'),
ipaddress.ip_network('10.1.1.32/27'),
ipaddress.ip_network('10.1.1.64/26'),
ipaddress.ip_network('10.1.1.128/25')])
def testHash(self):
self.assertEqual(hash(ipaddress.ip_interface('10.1.1.0/24')),