old_contents: # Copyright 2012 OpenStack Foundation
  # 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 collections
  import testtools
  
  from glanceclient import exc
  
  
  FakeResponse = collections.namedtuple('HTTPResponse', ['status'])
  
  
  class TestHTTPExceptions(testtools.TestCase):
      def test_from_response(self):
          """exc.from_response should return instance of an HTTP exception."""
          out = exc.from_response(FakeResponse(400))
          self.assertTrue(isinstance(out, exc.HTTPBadRequest))
  
new_contents: # Copyright 2012 OpenStack Foundation
  # 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 collections
  import testtools
  
  from glanceclient import exc
  
  
  FakeResponse = collections.namedtuple('HTTPResponse', ['status'])
  
  
  class TestHTTPExceptions(testtools.TestCase):
      def test_from_response(self):
          """exc.from_response should return instance of an HTTP exception."""
          out = exc.from_response(FakeResponse(400))
          self.assertIsInstance(out, exc.HTTPBadRequest)
  
subject: Change assertTrue(isinstance()) by optimal assert