/usr/lib/python3/dist-packages/twisted/python/test/modules_helpers.py is in python3-twisted-experimental 13.2.0-0ubuntu1.
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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 | # Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Facilities for helping test code which interacts with Python's module system
to load code.
"""
from __future__ import division, absolute_import
import sys
from twisted.python.filepath import FilePath
class TwistedModulesMixin:
"""
A mixin for C{twisted.trial.unittest.SynchronousTestCase} providing useful
methods for manipulating Python's module system.
"""
def replaceSysPath(self, sysPath):
"""
Replace sys.path, for the duration of the test, with the given value.
"""
originalSysPath = sys.path[:]
def cleanUpSysPath():
sys.path[:] = originalSysPath
self.addCleanup(cleanUpSysPath)
sys.path[:] = sysPath
def replaceSysModules(self, sysModules):
"""
Replace sys.modules, for the duration of the test, with the given value.
"""
originalSysModules = sys.modules.copy()
def cleanUpSysModules():
sys.modules.clear()
sys.modules.update(originalSysModules)
self.addCleanup(cleanUpSysModules)
sys.modules.clear()
sys.modules.update(sysModules)
def pathEntryWithOnePackage(self, pkgname=b"test_package"):
"""
Generate a L{FilePath} with one package, named C{pkgname}, on it, and
return the L{FilePath} of the path entry.
"""
# Remove utf-8 encode and bytes for path segments when Filepath
# supports Unicode paths on Python 3 (#2366, #4736, #5203).
entry = FilePath(self.mktemp().encode("utf-8"))
pkg = entry.child(b"test_package")
pkg.makedirs()
pkg.child(b"__init__.py").setContent(b"")
return entry
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