old_contents: # 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 fixtures
  from six.moves import mock
  
  
  class PatchObject(fixtures.Fixture):
      """Deal with code around mock."""
  
      def __init__(self, obj, attr, new=mock.DEFAULT, **kwargs):
          self.obj = obj
          self.attr = attr
          self.kwargs = kwargs
          self.new = new
  
      def setUp(self):
          super(PatchObject, self).setUp()
          _p = mock.patch.object(self.obj, self.attr, self.new, **self.kwargs)
          self.mock = _p.start()
          self.addCleanup(_p.stop)
  
  
  class Patch(fixtures.Fixture):
      """Deal with code around mock.patch."""
  
      def __init__(self, obj, new=mock.DEFAULT, **kwargs):
          self.obj = obj
          self.kwargs = kwargs
          self.new = new
  
      def setUp(self):
          super(Patch, self).setUp()
          _p = mock.patch(self.obj, self.new, **self.kwargs)
          self.mock = _p.start()
          self.addCleanup(_p.stop)
  
  
  class Multiple(fixtures.Fixture):
      """Deal with code around mock.patch.multiple."""
  
      # Default value to trigger a MagicMock to be created for a named
      # attribute.
      DEFAULT = mock.DEFAULT
  
      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.
  
          """
          self.obj = obj
          self.kwargs = kwargs
  
      def setUp(self):
          super(Multiple, self).setUp()
          _p = mock.patch.multiple(self.obj, **self.kwargs)
          self.mock = _p.start()
          self.addCleanup(_p.stop)
  
new_contents: # 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 fixtures
  from six.moves import mock
  
  
  class PatchObject(fixtures.Fixture):
      """Deal with code around mock."""
  
      def __init__(self, obj, attr, new=mock.DEFAULT, **kwargs):
          self.obj = obj
          self.attr = attr
          self.kwargs = kwargs
          self.new = new
  
      def setUp(self):
          super(PatchObject, self).setUp()
          _p = mock.patch.object(self.obj, self.attr, self.new, **self.kwargs)
          self.addCleanup(_p.stop)
          self.mock = _p.start()
  
  
  class Patch(fixtures.Fixture):
      """Deal with code around mock.patch."""
  
      def __init__(self, obj, new=mock.DEFAULT, **kwargs):
          self.obj = obj
          self.kwargs = kwargs
          self.new = new
  
      def setUp(self):
          super(Patch, self).setUp()
          _p = mock.patch(self.obj, self.new, **self.kwargs)
          self.addCleanup(_p.stop)
          self.mock = _p.start()
  
  
  class Multiple(fixtures.Fixture):
      """Deal with code around mock.patch.multiple."""
  
      # Default value to trigger a MagicMock to be created for a named
      # attribute.
      DEFAULT = mock.DEFAULT
  
      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.
  
          """
          self.obj = obj
          self.kwargs = kwargs
  
      def setUp(self):
          super(Multiple, self).setUp()
          _p = mock.patch.multiple(self.obj, **self.kwargs)
          self.addCleanup(_p.stop)
          self.mock = _p.start()
  
subject: fix a potential race condition