old_contents: #    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.
  
  
  from oslo_log import fixture
  from oslo_log import log as logging
  from oslotest import base as test_base
  
  LOG = logging.getLogger(__name__)
  
  
  class TestLoggingFixture(test_base.BaseTestCase):
      def test_logging_handle_error(self):
          LOG.error('pid of first child is %(foo)s', 1)
          self.useFixture(fixture.get_logging_handle_error_fixture())
          self.assertRaises(TypeError,
                            LOG.error,
                            'pid of first child is %(foo)s',
                            1)
  
new_contents: #    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.
  
  
  from oslo_log import fixture
  from oslo_log import log as logging
  from oslotest import base as test_base
  
  
  class TestLoggingFixture(test_base.BaseTestCase):
  
      def setUp(self):
          super(TestLoggingFixture, self).setUp()
          self.log = logging.getLogger(__name__)
  
      def test_logging_handle_error(self):
          self.log.error('pid of first child is %(foo)s', 1)
          self.useFixture(fixture.get_logging_handle_error_fixture())
          self.assertRaises(TypeError,
                            self.log.error,
                            'pid of first child is %(foo)s',
                            1)
  
subject: build a logger at the test level