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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2012 OpenStack LLC
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
# Test support for middleware authentication
#
import os
import sys
ROOTDIR = os.path.dirname(os.path.abspath(os.curdir))
def rootdir(*p):
return os.path.join(ROOTDIR, *p)
class NoModule(object):
"""A mixin class to provide support for unloading/disabling modules."""
def __init__(self, *args, **kw):
super(NoModule, self).__init__(*args, **kw)
self._finders = []
self._cleared_modules = {}
def tearDown(self):
super(NoModule, self).tearDown()
for finder in self._finders:
sys.meta_path.remove(finder)
sys.modules.update(self._cleared_modules)
def clear_module(self, module):
cleared_modules = {}
for fullname in sys.modules.keys():
if fullname == module or fullname.startswith(module + '.'):
cleared_modules[fullname] = sys.modules.pop(fullname)
return cleared_modules
def disable_module(self, module):
"""Ensure ImportError for the specified module."""
# Clear 'module' references in sys.modules
self._cleared_modules.update(self.clear_module(module))
# Disallow further imports of 'module'
class NoModule(object):
def find_module(self, fullname, path):
if fullname == module or fullname.startswith(module + '.'):
raise ImportError
finder = NoModule()
self._finders.append(finder)
sys.meta_path.insert(0, finder)
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