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# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2013 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# 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.
import unittest.mock as mock
import fixtures
class _Base(fixtures.Fixture):
def _setUp(self):
_p = self._get_p()
self.addCleanup(_p.stop)
self.mock = _p.start()
class MockPatchObject(_Base):
"""Deal with code around mock."""
def __init__(self, obj, attr, new=None, **kwargs):
super(MockPatchObject, self).__init__()
if new is None:
new = mock.DEFAULT
self._get_p = lambda: mock.patch.object(obj, attr, new, **kwargs)
class MockPatch(_Base):
"""Deal with code around mock.patch."""
def __init__(self, obj, new=None, **kwargs):
super(MockPatch, self).__init__()
if new is None:
new = mock.DEFAULT
self._get_p = lambda: mock.patch(obj, new, **kwargs)
class _MockPatchMultipleMeta(type):
"""Arrange for lazy loading of MockPatchMultiple.DEFAULT."""
# For strict backward compatibility, ensure that DEFAULT also works as
# an instance property.
def __new__(cls, name, bases, namespace, **kwargs):
namespace['DEFAULT'] = cls.DEFAULT
return super().__new__(cls, name, bases, namespace, **kwargs)
# Default value to trigger a MagicMock to be created for a named
# attribute.
@property
def DEFAULT(self):
return mock.DEFAULT
class MockPatchMultiple(_Base, metaclass=_MockPatchMultipleMeta):
"""Deal with code around mock.patch.multiple."""
def __init__(self, obj, **kwargs):
"""Initialize the mocks
Pass name=value to replace obj.name with value.
Pass name=Multiple.DEFAULT to replace obj.name with a
MagicMock instance.
:param obj: Object or name containing values being mocked.
:type obj: str or object
:param kwargs: names and values of attributes of obj to be mocked.
"""
super(MockPatchMultiple, self).__init__()
self._get_p = lambda: mock.patch.multiple(obj, **kwargs)
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