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# Mocking library for module and code injection, replay tests and other
# unit testing purposes
#
# Copyright (C) 2010
# Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Author(s): Martin Sivak <msivak@redhat.com>
from disk import *
from mock import *
import unittest
def slow(f):
"""Decorates a test method as being slow, usefull for python-nose filtering"""
f.slow = True
return f
def acceptance(f):
"""Decorates test as belonging to acceptance testing and not useable in common devellopment unit testing. To be used with python-nose filtering."""
f.acceptance = True
return f
class TestCase(unittest.TestCase):
def __init__(self, *args, **kwargs):
unittest.TestCase.__init__(self, *args, **kwargs)
self.injectedModules = {}
def setupModules(self, a):
"""Mock specified list of modules and store the list so it can be
properly unloaded during tearDown"""
import sys
self.preexistingModules = set(sys.modules.keys())
for m in a:
sys.modules[m] = Mock()
self.injectedModules[m] = sys.modules[m]
def modifiedModule(self, mname, mod = None):
"""Mark module (and all it's parents) as tainted"""
oldname=""
for m in mname.split("."):
self.injectedModules[oldname+m] = mod
oldname += m + "."
self.injectedModules[mname] = mod
def tearDownModules(self):
"""Unload previously Mocked modules"""
import sys
for m in sys.modules.keys():
if m in self.preexistingModules and not m in self.injectedModules:
continue
del sys.modules[m]
def take_over_io(self, disk, target_module):
""" Trick target_module into using disk object as the filesystem.
This is achieved by overriding the module's 'open' binding as well
as many global bindings in os.path.
"""
target_module.open = disk.open
self.modifiedModule(target_module.__name__)
import glob
self.modifiedModule("glob")
glob.glob = disk.glob_glob
import os
self.modifiedModule("os.path")
# this is what os.path implementaion points at, reimport:
import posixpath
self.modifiedModule("posixpath")
os.listdir = disk.os_listdir
os.path.exists = disk.os_path_exists
os.path.isdir = disk.os_path_isdir
os.access = disk.os_access
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