/usr/lib/python3/dist-packages/twisted/test/test_iutils.py is in python3-twisted-experimental 13.2.0-0ubuntu1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 | # Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Test running processes with the APIs in L{twisted.internet.utils}.
"""
from __future__ import division, absolute_import
import warnings, os, stat, sys, signal
from twisted.python.compat import _PY3
from twisted.python.runtime import platform
from twisted.trial import unittest
from twisted.internet import error, reactor, utils, interfaces
from twisted.internet.defer import Deferred
from twisted.python.test.test_util import SuppressedWarningsTests
class ProcessUtilsTests(unittest.TestCase):
"""
Test running a process using L{getProcessOutput}, L{getProcessValue}, and
L{getProcessOutputAndValue}.
"""
if interfaces.IReactorProcess(reactor, None) is None:
skip = "reactor doesn't implement IReactorProcess"
output = None
value = None
exe = sys.executable
def makeSourceFile(self, sourceLines):
"""
Write the given list of lines to a text file and return the absolute
path to it.
"""
script = self.mktemp()
scriptFile = file(script, 'wt')
scriptFile.write(os.linesep.join(sourceLines) + os.linesep)
scriptFile.close()
return os.path.abspath(script)
def test_output(self):
"""
L{getProcessOutput} returns a L{Deferred} which fires with the complete
output of the process it runs after that process exits.
"""
scriptFile = self.makeSourceFile([
"import sys",
"for s in 'hello world\\n':",
" sys.stdout.write(s)",
" sys.stdout.flush()"])
d = utils.getProcessOutput(self.exe, ['-u', scriptFile])
return d.addCallback(self.assertEqual, "hello world\n")
def test_outputWithErrorIgnored(self):
"""
The L{Deferred} returned by L{getProcessOutput} is fired with an
L{IOError} L{Failure} if the child process writes to stderr.
"""
# make sure stderr raises an error normally
scriptFile = self.makeSourceFile([
'import sys',
'sys.stderr.write("hello world\\n")'
])
d = utils.getProcessOutput(self.exe, ['-u', scriptFile])
d = self.assertFailure(d, IOError)
def cbFailed(err):
return self.assertFailure(err.processEnded, error.ProcessDone)
d.addCallback(cbFailed)
return d
def test_outputWithErrorCollected(self):
"""
If a C{True} value is supplied for the C{errortoo} parameter to
L{getProcessOutput}, the returned L{Deferred} fires with the child's
stderr output as well as its stdout output.
"""
scriptFile = self.makeSourceFile([
'import sys',
# Write the same value to both because ordering isn't guaranteed so
# this simplifies the test.
'sys.stdout.write("foo")',
'sys.stdout.flush()',
'sys.stderr.write("foo")',
'sys.stderr.flush()'])
d = utils.getProcessOutput(self.exe, ['-u', scriptFile], errortoo=True)
return d.addCallback(self.assertEqual, "foofoo")
def test_value(self):
"""
The L{Deferred} returned by L{getProcessValue} is fired with the exit
status of the child process.
"""
scriptFile = self.makeSourceFile(["raise SystemExit(1)"])
d = utils.getProcessValue(self.exe, ['-u', scriptFile])
return d.addCallback(self.assertEqual, 1)
def test_outputAndValue(self):
"""
The L{Deferred} returned by L{getProcessOutputAndValue} fires with a
three-tuple, the elements of which give the data written to the child's
stdout, the data written to the child's stderr, and the exit status of
the child.
"""
exe = sys.executable
scriptFile = self.makeSourceFile([
"import sys",
"sys.stdout.write('hello world!\\n')",
"sys.stderr.write('goodbye world!\\n')",
"sys.exit(1)"
])
def gotOutputAndValue(out_err_code):
out, err, code = out_err_code
self.assertEqual(out, "hello world!\n")
self.assertEqual(err, "goodbye world!" + os.linesep)
self.assertEqual(code, 1)
d = utils.getProcessOutputAndValue(self.exe, ["-u", scriptFile])
return d.addCallback(gotOutputAndValue)
def test_outputSignal(self):
"""
If the child process exits because of a signal, the L{Deferred}
returned by L{getProcessOutputAndValue} fires a L{Failure} of a tuple
containing the the child's stdout, stderr, and the signal which caused
it to exit.
"""
# Use SIGKILL here because it's guaranteed to be delivered. Using
# SIGHUP might not work in, e.g., a buildbot slave run under the
# 'nohup' command.
scriptFile = self.makeSourceFile([
"import sys, os, signal",
"sys.stdout.write('stdout bytes\\n')",
"sys.stderr.write('stderr bytes\\n')",
"sys.stdout.flush()",
"sys.stderr.flush()",
"os.kill(os.getpid(), signal.SIGKILL)"])
def gotOutputAndValue(out_err_sig):
out, err, sig = out_err_sig
self.assertEqual(out, "stdout bytes\n")
self.assertEqual(err, "stderr bytes\n")
self.assertEqual(sig, signal.SIGKILL)
d = utils.getProcessOutputAndValue(self.exe, ['-u', scriptFile])
d = self.assertFailure(d, tuple)
return d.addCallback(gotOutputAndValue)
if platform.isWindows():
test_outputSignal.skip = "Windows doesn't have real signals."
def _pathTest(self, utilFunc, check):
dir = os.path.abspath(self.mktemp())
os.makedirs(dir)
scriptFile = self.makeSourceFile([
"import os, sys",
"sys.stdout.write(os.getcwd())"])
d = utilFunc(self.exe, ['-u', scriptFile], path=dir)
d.addCallback(check, dir)
return d
def test_getProcessOutputPath(self):
"""
L{getProcessOutput} runs the given command with the working directory
given by the C{path} parameter.
"""
return self._pathTest(utils.getProcessOutput, self.assertEqual)
def test_getProcessValuePath(self):
"""
L{getProcessValue} runs the given command with the working directory
given by the C{path} parameter.
"""
def check(result, ignored):
self.assertEqual(result, 0)
return self._pathTest(utils.getProcessValue, check)
def test_getProcessOutputAndValuePath(self):
"""
L{getProcessOutputAndValue} runs the given command with the working
directory given by the C{path} parameter.
"""
def check(out_err_status, dir):
out, err, status = out_err_status
self.assertEqual(out, dir)
self.assertEqual(status, 0)
return self._pathTest(utils.getProcessOutputAndValue, check)
def _defaultPathTest(self, utilFunc, check):
# Make another directory to mess around with.
dir = os.path.abspath(self.mktemp())
os.makedirs(dir)
scriptFile = self.makeSourceFile([
"import os, sys, stat",
# Fix the permissions so we can report the working directory.
# On OS X (and maybe elsewhere), os.getcwd() fails with EACCES
# if +x is missing from the working directory.
"os.chmod(%r, stat.S_IXUSR)" % (dir,),
"sys.stdout.write(os.getcwd())"])
# Switch to it, but make sure we switch back
self.addCleanup(os.chdir, os.getcwd())
os.chdir(dir)
# Get rid of all its permissions, but make sure they get cleaned up
# later, because otherwise it might be hard to delete the trial
# temporary directory.
self.addCleanup(
os.chmod, dir, stat.S_IMODE(os.stat('.').st_mode))
os.chmod(dir, 0)
d = utilFunc(self.exe, ['-u', scriptFile])
d.addCallback(check, dir)
return d
def test_getProcessOutputDefaultPath(self):
"""
If no value is supplied for the C{path} parameter, L{getProcessOutput}
runs the given command in the same working directory as the parent
process and succeeds even if the current working directory is not
accessible.
"""
return self._defaultPathTest(utils.getProcessOutput, self.assertEqual)
def test_getProcessValueDefaultPath(self):
"""
If no value is supplied for the C{path} parameter, L{getProcessValue}
runs the given command in the same working directory as the parent
process and succeeds even if the current working directory is not
accessible.
"""
def check(result, ignored):
self.assertEqual(result, 0)
return self._defaultPathTest(utils.getProcessValue, check)
def test_getProcessOutputAndValueDefaultPath(self):
"""
If no value is supplied for the C{path} parameter,
L{getProcessOutputAndValue} runs the given command in the same working
directory as the parent process and succeeds even if the current
working directory is not accessible.
"""
def check(out_err_status, dir):
out, err, status = out_err_status
self.assertEqual(out, dir)
self.assertEqual(status, 0)
return self._defaultPathTest(
utils.getProcessOutputAndValue, check)
class SuppressWarningsTests(unittest.SynchronousTestCase):
"""
Tests for L{utils.suppressWarnings}.
"""
def test_suppressWarnings(self):
"""
L{utils.suppressWarnings} decorates a function so that the given
warnings are suppressed.
"""
result = []
def showwarning(self, *a, **kw):
result.append((a, kw))
self.patch(warnings, "showwarning", showwarning)
def f(msg):
warnings.warn(msg)
g = utils.suppressWarnings(f, (('ignore',), dict(message="This is message")))
# Start off with a sanity check - calling the original function
# should emit the warning.
f("Sanity check message")
self.assertEqual(len(result), 1)
# Now that that's out of the way, call the wrapped function, and
# make sure no new warnings show up.
g("This is message")
self.assertEqual(len(result), 1)
# Finally, emit another warning which should not be ignored, and
# make sure it is not.
g("Unignored message")
self.assertEqual(len(result), 2)
class DeferredSuppressedWarningsTests(SuppressedWarningsTests):
"""
Tests for L{utils.runWithWarningsSuppressed}, the version that supports
Deferreds.
"""
# Override the non-Deferred-supporting function from the base class with
# the function we are testing in this class:
runWithWarningsSuppressed = staticmethod(utils.runWithWarningsSuppressed)
def test_deferredCallback(self):
"""
If the function called by L{utils.runWithWarningsSuppressed} returns a
C{Deferred}, the warning filters aren't removed until the Deferred
fires.
"""
filters = [(("ignore", ".*foo.*"), {}),
(("ignore", ".*bar.*"), {})]
result = Deferred()
self.runWithWarningsSuppressed(filters, lambda: result)
warnings.warn("ignore foo")
result.callback(3)
warnings.warn("ignore foo 2")
self.assertEqual(
["ignore foo 2"], [w['message'] for w in self.flushWarnings()])
def test_deferredErrback(self):
"""
If the function called by L{utils.runWithWarningsSuppressed} returns a
C{Deferred}, the warning filters aren't removed until the Deferred
fires with an errback.
"""
filters = [(("ignore", ".*foo.*"), {}),
(("ignore", ".*bar.*"), {})]
result = Deferred()
d = self.runWithWarningsSuppressed(filters, lambda: result)
warnings.warn("ignore foo")
result.errback(ZeroDivisionError())
d.addErrback(lambda f: f.trap(ZeroDivisionError))
warnings.warn("ignore foo 2")
self.assertEqual(
["ignore foo 2"], [w['message'] for w in self.flushWarnings()])
if _PY3:
del ProcessUtilsTests
|