old_contents: # Copyright (c) 2013 Rackspace Hosting
  # 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 uuid
  
  import mock
  from oslotest import base as test_base
  from oslotest import moxstubout
  
  from oslo_middleware import correlation_id
  
  
  class CorrelationIdTest(test_base.BaseTestCase):
  
      def setUp(self):
          super(CorrelationIdTest, self).setUp()
          self.stubs = self.useFixture(moxstubout.MoxStubout()).stubs
  
      def test_process_request(self):
          app = mock.Mock()
          req = mock.Mock()
          req.headers = {}
  
          mock_uuid4 = mock.Mock()
          mock_uuid4.return_value = "fake_uuid"
          self.stubs.Set(uuid, 'uuid4', mock_uuid4)
  
          middleware = correlation_id.CorrelationId(app)
          middleware(req)
  
          self.assertEqual("fake_uuid", req.headers.get("X_CORRELATION_ID"))
  
      def test_process_request_should_not_regenerate_correlation_id(self):
          app = mock.Mock()
          req = mock.Mock()
          req.headers = {"X_CORRELATION_ID": "correlation_id"}
  
          middleware = correlation_id.CorrelationId(app)
          middleware(req)
  
          self.assertEqual("correlation_id", req.headers.get("X_CORRELATION_ID"))
  
new_contents: # Copyright (c) 2013 Rackspace Hosting
  # 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
  import mock
  from oslotest import base as test_base
  
  from oslo_middleware import correlation_id
  
  
  class CorrelationIdTest(test_base.BaseTestCase):
  
      def setUp(self):
          super(CorrelationIdTest, self).setUp()
  
      def test_process_request(self):
          app = mock.Mock()
          req = mock.Mock()
          req.headers = {}
  
          mock_uuid4 = mock.Mock()
          mock_uuid4.return_value = "fake_uuid"
          self.useFixture(fixtures.MockPatch('uuid.uuid4', mock_uuid4))
  
          middleware = correlation_id.CorrelationId(app)
          middleware(req)
  
          self.assertEqual("fake_uuid", req.headers.get("X_CORRELATION_ID"))
  
      def test_process_request_should_not_regenerate_correlation_id(self):
          app = mock.Mock()
          req = mock.Mock()
          req.headers = {"X_CORRELATION_ID": "correlation_id"}
  
          middleware = correlation_id.CorrelationId(app)
          middleware(req)
  
          self.assertEqual("correlation_id", req.headers.get("X_CORRELATION_ID"))
  
subject: Remove moxstubout usage