/usr/lib/python2.7/dist-packages/twisted/names/test/test_hosts.py is in python-twisted-names 14.0.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 | # Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for the I{hosts(5)}-based resolver, L{twisted.names.hosts}.
"""
from __future__ import division, absolute_import
from twisted.trial.unittest import TestCase
from twisted.python.filepath import FilePath
from twisted.internet.defer import gatherResults
from twisted.names.dns import (
A, AAAA, IN, DomainError, RRHeader, Query, Record_A, Record_AAAA)
from twisted.names.hosts import Resolver, searchFileFor, searchFileForAll
class GoodTempPathMixin(object):
def path(self):
return FilePath(self.mktemp().encode('utf-8'))
class SearchHostsFileTests(TestCase, GoodTempPathMixin):
"""
Tests for L{searchFileFor}, a helper which finds the first address for a
particular hostname in a I{hosts(5)}-style file.
"""
def test_findAddress(self):
"""
If there is an IPv4 address for the hostname passed to L{searchFileFor},
it is returned.
"""
hosts = self.path()
hosts.setContent(
b"10.2.3.4 foo.example.com\n")
self.assertEqual(
"10.2.3.4", searchFileFor(hosts.path, b"foo.example.com"))
def test_notFoundAddress(self):
"""
If there is no address information for the hostname passed to
L{searchFileFor}, C{None} is returned.
"""
hosts = self.path()
hosts.setContent(
b"10.2.3.4 foo.example.com\n")
self.assertIs(None, searchFileFor(hosts.path, b"bar.example.com"))
def test_firstAddress(self):
"""
The first address associated with the given hostname is returned.
"""
hosts = self.path()
hosts.setContent(
b"::1 foo.example.com\n"
b"10.1.2.3 foo.example.com\n"
b"fe80::21b:fcff:feee:5a1d foo.example.com\n")
self.assertEqual("::1", searchFileFor(hosts.path, b"foo.example.com"))
def test_searchFileForAliases(self):
"""
For a host with a canonical name and one or more aliases,
L{searchFileFor} can find an address given any of the names.
"""
hosts = self.path()
hosts.setContent(
b"127.0.1.1\thelmut.example.org\thelmut\n"
b"# a comment\n"
b"::1 localhost ip6-localhost ip6-loopback\n")
self.assertEqual(searchFileFor(hosts.path, b'helmut'), '127.0.1.1')
self.assertEqual(
searchFileFor(hosts.path, b'helmut.example.org'), '127.0.1.1')
self.assertEqual(searchFileFor(hosts.path, b'ip6-localhost'), '::1')
self.assertEqual(searchFileFor(hosts.path, b'ip6-loopback'), '::1')
self.assertEqual(searchFileFor(hosts.path, b'localhost'), '::1')
class SearchHostsFileForAllTests(TestCase, GoodTempPathMixin):
"""
Tests for L{searchFileForAll}, a helper which finds all addresses for a
particular hostname in a I{hosts(5)}-style file.
"""
def test_allAddresses(self):
"""
L{searchFileForAll} returns a list of all addresses associated with the
name passed to it.
"""
hosts = self.path()
hosts.setContent(
b"127.0.0.1 foobar.example.com\n"
b"127.0.0.2 foobar.example.com\n"
b"::1 foobar.example.com\n")
self.assertEqual(
["127.0.0.1", "127.0.0.2", "::1"],
searchFileForAll(hosts, b"foobar.example.com"))
def test_caseInsensitively(self):
"""
L{searchFileForAll} searches for names case-insensitively.
"""
hosts = self.path()
hosts.setContent(b"127.0.0.1 foobar.EXAMPLE.com\n")
self.assertEqual(
["127.0.0.1"], searchFileForAll(hosts, b"FOOBAR.example.com"))
def test_readError(self):
"""
If there is an error reading the contents of the hosts file,
L{searchFileForAll} returns an empty list.
"""
self.assertEqual(
[], searchFileForAll(self.path(), b"example.com"))
class HostsTestCase(TestCase, GoodTempPathMixin):
"""
Tests for the I{hosts(5)}-based L{twisted.names.hosts.Resolver}.
"""
def setUp(self):
f = self.path()
f.setContent(b'''
1.1.1.1 EXAMPLE EXAMPLE.EXAMPLETHING
::2 mixed
1.1.1.2 MIXED
::1 ip6thingy
1.1.1.3 multiple
1.1.1.4 multiple
::3 ip6-multiple
::4 ip6-multiple
''')
self.ttl = 4200
self.resolver = Resolver(f.path, self.ttl)
def test_defaultPath(self):
"""
The default hosts file used by L{Resolver} is I{/etc/hosts} if no value
is given for the C{file} initializer parameter.
"""
resolver = Resolver()
self.assertEqual(b"/etc/hosts", resolver.file)
def test_getHostByName(self):
"""
L{hosts.Resolver.getHostByName} returns a L{Deferred} which fires with a
string giving the address of the queried name as found in the resolver's
hosts file.
"""
data = [(b'EXAMPLE', '1.1.1.1'),
(b'EXAMPLE.EXAMPLETHING', '1.1.1.1'),
(b'MIXED', '1.1.1.2'),
]
ds = [self.resolver.getHostByName(n).addCallback(self.assertEqual, ip)
for n, ip in data]
return gatherResults(ds)
def test_lookupAddress(self):
"""
L{hosts.Resolver.lookupAddress} returns a L{Deferred} which fires with A
records from the hosts file.
"""
d = self.resolver.lookupAddress(b'multiple')
def resolved(results):
answers, authority, additional = results
self.assertEqual(
(RRHeader(b"multiple", A, IN, self.ttl,
Record_A("1.1.1.3", self.ttl)),
RRHeader(b"multiple", A, IN, self.ttl,
Record_A("1.1.1.4", self.ttl))),
answers)
d.addCallback(resolved)
return d
def test_lookupIPV6Address(self):
"""
L{hosts.Resolver.lookupIPV6Address} returns a L{Deferred} which fires
with AAAA records from the hosts file.
"""
d = self.resolver.lookupIPV6Address(b'ip6-multiple')
def resolved(results):
answers, authority, additional = results
self.assertEqual(
(RRHeader(b"ip6-multiple", AAAA, IN, self.ttl,
Record_AAAA("::3", self.ttl)),
RRHeader(b"ip6-multiple", AAAA, IN, self.ttl,
Record_AAAA("::4", self.ttl))),
answers)
d.addCallback(resolved)
return d
def test_lookupAllRecords(self):
"""
L{hosts.Resolver.lookupAllRecords} returns a L{Deferred} which fires
with A records from the hosts file.
"""
d = self.resolver.lookupAllRecords(b'mixed')
def resolved(results):
answers, authority, additional = results
self.assertEqual(
(RRHeader(b"mixed", A, IN, self.ttl,
Record_A("1.1.1.2", self.ttl)),),
answers)
d.addCallback(resolved)
return d
def testNotImplemented(self):
return self.assertFailure(self.resolver.lookupMailExchange(b'EXAMPLE'),
NotImplementedError)
def testQuery(self):
d = self.resolver.query(Query(b'EXAMPLE'))
d.addCallback(lambda x: self.assertEqual(x[0][0].payload.dottedQuad(),
'1.1.1.1'))
return d
def test_lookupAddressNotFound(self):
"""
L{hosts.Resolver.lookupAddress} returns a L{Deferred} which fires with
L{dns.DomainError} if the name passed in has no addresses in the hosts
file.
"""
return self.assertFailure(self.resolver.lookupAddress(b'foueoa'),
DomainError)
def test_lookupIPV6AddressNotFound(self):
"""
Like L{test_lookupAddressNotFound}, but for
L{hosts.Resolver.lookupIPV6Address}.
"""
return self.assertFailure(self.resolver.lookupIPV6Address(b'foueoa'),
DomainError)
def test_lookupAllRecordsNotFound(self):
"""
Like L{test_lookupAddressNotFound}, but for
L{hosts.Resolver.lookupAllRecords}.
"""
return self.assertFailure(self.resolver.lookupAllRecords(b'foueoa'),
DomainError)
|