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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.python.runtime}.
"""
from __future__ import division, absolute_import
import sys
from twisted.python.reflect import namedModule
from twisted.trial.util import suppress as SUPRESS
from twisted.trial.unittest import SynchronousTestCase
from twisted.python.runtime import Platform, shortPythonVersion
class PythonVersionTests(SynchronousTestCase):
"""
Tests the shortPythonVersion method.
"""
def test_shortPythonVersion(self):
"""
Verify if the Python version is returned correctly.
"""
ver = shortPythonVersion().split('.')
for i in range(3):
self.assertEqual(int(ver[i]), sys.version_info[i])
class PlatformTests(SynchronousTestCase):
"""
Tests for the default L{Platform} initializer.
"""
isWinNTDeprecationMessage = ('twisted.python.runtime.Platform.isWinNT was '
'deprecated in Twisted 13.0. Use Platform.isWindows instead.')
def test_isKnown(self):
"""
L{Platform.isKnown} returns a boolean indicating whether this is one of
the L{runtime.knownPlatforms}.
"""
platform = Platform()
self.assertTrue(platform.isKnown())
def test_isVistaConsistency(self):
"""
Verify consistency of L{Platform.isVista}: it can only be C{True} if
L{Platform.isWinNT} and L{Platform.isWindows} are C{True}.
"""
platform = Platform()
if platform.isVista():
self.assertTrue(platform.isWinNT())
self.assertTrue(platform.isWindows())
self.assertFalse(platform.isMacOSX())
def test_isMacOSXConsistency(self):
"""
L{Platform.isMacOSX} can only return C{True} if L{Platform.getType}
returns C{'posix'}.
"""
platform = Platform()
if platform.isMacOSX():
self.assertEqual(platform.getType(), 'posix')
def test_isLinuxConsistency(self):
"""
L{Platform.isLinux} can only return C{True} if L{Platform.getType}
returns C{'posix'} and L{sys.platform} starts with C{"linux"}.
"""
platform = Platform()
if platform.isLinux():
self.assertTrue(sys.platform.startswith("linux"))
def test_isWinNT(self):
"""
L{Platform.isWinNT} can return only C{False} or C{True} and can not
return C{True} if L{Platform.getType} is not C{"win32"}.
"""
platform = Platform()
isWinNT = platform.isWinNT()
self.assertIn(isWinNT, (False, True))
if platform.getType() != "win32":
self.assertFalse(isWinNT)
test_isWinNT.suppress = [SUPRESS(category=DeprecationWarning,
message=isWinNTDeprecationMessage)]
def test_isWinNTDeprecated(self):
"""
L{Platform.isWinNT} is deprecated in favor of L{platform.isWindows}.
"""
platform = Platform()
platform.isWinNT()
warnings = self.flushWarnings([self.test_isWinNTDeprecated])
self.assertEqual(len(warnings), 1)
self.assertEqual(
warnings[0]['message'], self.isWinNTDeprecationMessage)
def test_supportsThreads(self):
"""
L{Platform.supportsThreads} returns C{True} if threads can be created in
this runtime, C{False} otherwise.
"""
# It's difficult to test both cases of this without faking the threading
# module. Perhaps an adequate test is to just test the behavior with
# the current runtime, whatever that happens to be.
try:
namedModule('threading')
except ImportError:
self.assertFalse(Platform().supportsThreads())
else:
self.assertTrue(Platform().supportsThreads())
class ForeignPlatformTests(SynchronousTestCase):
"""
Tests for L{Platform} based overridden initializer values.
"""
def test_getType(self):
"""
If an operating system name is supplied to L{Platform}'s initializer,
L{Platform.getType} returns the platform type which corresponds to that
name.
"""
self.assertEqual(Platform('nt').getType(), 'win32')
self.assertEqual(Platform('ce').getType(), 'win32')
self.assertEqual(Platform('posix').getType(), 'posix')
self.assertEqual(Platform('java').getType(), 'java')
def test_isMacOSX(self):
"""
If a system platform name is supplied to L{Platform}'s initializer, it
is used to determine the result of L{Platform.isMacOSX}, which returns
C{True} for C{"darwin"}, C{False} otherwise.
"""
self.assertTrue(Platform(None, 'darwin').isMacOSX())
self.assertFalse(Platform(None, 'linux2').isMacOSX())
self.assertFalse(Platform(None, 'win32').isMacOSX())
def test_isLinux(self):
"""
If a system platform name is supplied to L{Platform}'s initializer, it
is used to determine the result of L{Platform.isLinux}, which returns
C{True} for values beginning with C{"linux"}, C{False} otherwise.
"""
self.assertFalse(Platform(None, 'darwin').isLinux())
self.assertTrue(Platform(None, 'linux').isLinux())
self.assertTrue(Platform(None, 'linux2').isLinux())
self.assertTrue(Platform(None, 'linux3').isLinux())
self.assertFalse(Platform(None, 'win32').isLinux())
class DockerPlatformTests(SynchronousTestCase):
"""
Tests for L{twisted.python.runtime.Platform.isDocker}.
"""
def test_noChecksOnLinux(self):
"""
If the platform is not Linux, C{isDocker()} always returns L{False}.
"""
platform = Platform(None, 'win32')
self.assertFalse(platform.isDocker())
def test_noCGroups(self):
"""
If the platform is Linux, and the cgroups file in C{/proc} does not
exist, C{isDocker()} returns L{False}
"""
platform = Platform(None, 'linux')
self.assertFalse(platform.isDocker(_initCGroupLocation="fakepath"))
def test_cgroupsSuggestsDocker(self):
"""
If the platform is Linux, and the cgroups file (faked out here) exists,
and one of the paths starts with C{/docker/}, C{isDocker()} returns
C{True}.
"""
cgroupsFile = self.mktemp()
with open(cgroupsFile, 'wb') as f:
# real cgroups file from inside a Debian 7 docker container
f.write(b"""10:debug:/
9:net_prio:/
8:perf_event:/docker/104155a6453cb67590027e397dc90fc25a06a7508403c797bc89ea43adf8d35f
7:net_cls:/
6:freezer:/docker/104155a6453cb67590027e397dc90fc25a06a7508403c797bc89ea43adf8d35f
5:devices:/docker/104155a6453cb67590027e397dc90fc25a06a7508403c797bc89ea43adf8d35f
4:blkio:/docker/104155a6453cb67590027e397dc90fc25a06a7508403c797bc89ea43adf8d35f
3:cpuacct:/docker/104155a6453cb67590027e397dc90fc25a06a7508403c797bc89ea43adf8d35f
2:cpu:/docker/104155a6453cb67590027e397dc90fc25a06a7508403c797bc89ea43adf8d35f
1:cpuset:/docker/104155a6453cb67590027e397dc90fc25a06a7508403c797bc89ea43adf8d35f""")
platform = Platform(None, 'linux')
self.assertTrue(platform.isDocker(_initCGroupLocation=cgroupsFile))
def test_cgroupsSuggestsRealSystem(self):
"""
If the platform is Linux, and the cgroups file (faked out here) exists,
and none of the paths starts with C{/docker/}, C{isDocker()} returns
C{False}.
"""
cgroupsFile = self.mktemp()
with open(cgroupsFile, 'wb') as f:
# real cgroups file from a Fedora 17 system
f.write(b"""9:perf_event:/
8:blkio:/
7:net_cls:/
6:freezer:/
5:devices:/
4:memory:/
3:cpuacct,cpu:/
2:cpuset:/
1:name=systemd:/system""")
platform = Platform(None, 'linux')
self.assertFalse(platform.isDocker(_initCGroupLocation=cgroupsFile))