/usr/lib/python3/dist-packages/twisted/internet/test/modulehelpers.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 | # Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Testing helpers related to the module system.
"""
from __future__ import division, absolute_import
__all__ = ['NoReactor', 'AlternateReactor']
import sys
import twisted.internet
from twisted.test.test_twisted import SetAsideModule
class NoReactor(SetAsideModule):
"""
Context manager that uninstalls the reactor, if any, and then restores it
afterwards.
"""
def __init__(self):
SetAsideModule.__init__(self, "twisted.internet.reactor")
def __enter__(self):
SetAsideModule.__enter__(self)
if "twisted.internet.reactor" in self.modules:
del twisted.internet.reactor
def __exit__(self, excType, excValue, traceback):
SetAsideModule.__exit__(self, excType, excValue, traceback)
# Clean up 'reactor' attribute that may have been set on
# twisted.internet:
reactor = self.modules.get("twisted.internet.reactor", None)
if reactor is not None:
twisted.internet.reactor = reactor
else:
try:
del twisted.internet.reactor
except AttributeError:
pass
class AlternateReactor(NoReactor):
"""
A context manager which temporarily installs a different object as the
global reactor.
"""
def __init__(self, reactor):
"""
@param reactor: Any object to install as the global reactor.
"""
NoReactor.__init__(self)
self.alternate = reactor
def __enter__(self):
NoReactor.__enter__(self)
twisted.internet.reactor = self.alternate
sys.modules['twisted.internet.reactor'] = self.alternate
|