netwatch.py/netaddr-0.7.10/netaddr/tests/2.x/ip/constructor.txt

=IP Constructor Stress Tests=

Copyright (c) 2008-2012, David P. D. Moss. All rights reserved.

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>>> from netaddr import *

}}}

IPAddress constructor - integer values.

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>>> IPAddress(1)
IPAddress('0.0.0.1')

>>> IPAddress(1, 4)
IPAddress('0.0.0.1')

>>> IPAddress(1, 6)
IPAddress('::1')

>>> IPAddress(10)
IPAddress('0.0.0.10')

>>> IPAddress(0x1ffffffff)
IPAddress('::1:ffff:ffff')

>>> IPAddress(0xffffffff, 6)
IPAddress('::255.255.255.255')

>>> IPAddress(0x1ffffffff)
IPAddress('::1:ffff:ffff')

>>> IPAddress(2 ** 128 - 1)
IPAddress('ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')

}}}

IPAddress constructor - IPv4 inet_aton behaviour (default).

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#	Hexadecimal octets.
>>> IPAddress('0x7f.0x1')
IPAddress('127.0.0.1')

>>> IPAddress('0x7f.0x0.0x0.0x1')
IPAddress('127.0.0.1')

#	Octal octets.
>>> IPAddress('0177.01')
IPAddress('127.0.0.1')

#	Mixed octets.
>>> IPAddress('0x7f.0.01')
IPAddress('127.0.0.1')

#	Partial addresses - pretty weird ...
>>> IPAddress('127')
IPAddress('0.0.0.127')

>>> IPAddress('127')
IPAddress('0.0.0.127')

>>> IPAddress('127.1')
IPAddress('127.0.0.1')

>>> IPAddress('127.0.1')
IPAddress('127.0.0.1')

}}}

IPAddress constructor - IPv4 inet_pton behaviour (stricter parser).

{{{

#	Octal octets.
>>> IPAddress('0177.01', flags=INET_PTON)
Traceback (most recent call last):
...
AddrFormatError: failed to detect a valid IP address from '0177.01'

#	Mixed octets.
>>> IPAddress('0x7f.0.01', flags=INET_PTON)
Traceback (most recent call last):
...
AddrFormatError: failed to detect a valid IP address from '0x7f.0.01'

#   Partial octets.
>>> IPAddress('10', flags=INET_PTON)
Traceback (most recent call last):
...
AddrFormatError: failed to detect a valid IP address from '10'

>>> IPAddress('10.1', flags=INET_PTON)
Traceback (most recent call last):
...
AddrFormatError: failed to detect a valid IP address from '10.1'

>>> IPAddress('10.0.1', flags=INET_PTON)
Traceback (most recent call last):
...
AddrFormatError: failed to detect a valid IP address from '10.0.1'

>>> IPAddress('10.0.0.1', flags=INET_PTON)
IPAddress('10.0.0.1')

}}}

IPAddress constructor - zero filled octets.

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#   This takes a lot of people by surprise ...
>>> IPAddress('010.000.000.001')
IPAddress('8.0.0.1')

#   So, we need this!
>>> IPAddress('010.000.000.001', flags=ZEROFILL)
IPAddress('10.0.0.1')

#   Zero-fill with inet_aton behaviour - partial octets are OK but zero-filled
#   octets are interpreted as decimal ...
>>> IPAddress('010.000.001', flags=ZEROFILL)
IPAddress('10.0.0.1')

#   Zero-fill with inet_pton behaviour - 4 octets only!
>>> IPAddress('010.000.001', flags=INET_PTON|ZEROFILL)
Traceback (most recent call last):
...
AddrFormatError: failed to detect a valid IP address from '010.000.001'

#   Zero-fill with inet_pton behaviour - 4 octets only!
>>> IPAddress('010.000.000.001', flags=INET_PTON|ZEROFILL)
IPAddress('10.0.0.1')

#   To save some typing there are short versions of these flags.
>>> IPAddress('010.000.000.001', flags=P|Z)
IPAddress('10.0.0.1')

}}}

IP network construction.

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>>> IPNetwork('192.0.2.0/24')
IPNetwork('192.0.2.0/24')

>>> IPNetwork('192.0.2.0/255.255.255.0')
IPNetwork('192.0.2.0/24')

>>> IPNetwork('192.0.2.0/0.0.0.255')
IPNetwork('192.0.2.0/24')

>>> IPNetwork(IPNetwork('192.0.2.0/24'))
IPNetwork('192.0.2.0/24')

>>> IPNetwork(IPNetwork('::192.0.2.0/120'))
IPNetwork('::192.0.2.0/120')

>>> IPNetwork(IPNetwork('192.0.2.0/24'))
IPNetwork('192.0.2.0/24')

>>> IPNetwork('::192.0.2.0/120')
IPNetwork('::192.0.2.0/120')

>>> IPNetwork('::192.0.2.0/120', 6)
IPNetwork('::192.0.2.0/120')

}}}

Optional implicit IP network prefix selection rules.

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>>> IPNetwork('192.0.2.0', implicit_prefix=True)
IPNetwork('192.0.2.0/24')

>>> IPNetwork('231.192.0.15', implicit_prefix=True)
IPNetwork('231.192.0.15/4')

>>> IPNetwork('10', implicit_prefix=True)
IPNetwork('10.0.0.0/8')

}}}

Optional flags for tweaking IPNetwork constructor behaviour.

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>>> IPNetwork('172.24.200')
IPNetwork('172.24.200.0/32')

>>> IPNetwork('172.24.200', implicit_prefix=True)
IPNetwork('172.24.200.0/16')

#	Truncate the host bits so we get a pure network.
>>> IPNetwork('172.24.200', implicit_prefix=True, flags=NOHOST)
IPNetwork('172.24.0.0/16')


}}}

Negative testing

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>>> IPNetwork('foo')
Traceback (most recent call last):
...
AddrFormatError: invalid IPNetwork foo

}}}