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  # Copyright 2010-2011 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.
  
  """Common utilities used in testing"""
  
  import os
  
  import fixtures
  import testtools
  
  
  class BaseTestCase(testtools.TestCase):
  
      def setUp(self):
          super(BaseTestCase, self).setUp()
          self._set_timeout()
          self._fake_output()
          self.useFixture(fixtures.FakeLogger('openstack.common'))
  
      def _set_timeout(self):
          test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)
          try:
              test_timeout = int(test_timeout)
          except ValueError:
              # If timeout value is invalid do not set a timeout.
              test_timeout = 0
          if test_timeout > 0:
              self.useFixture(fixtures.Timeout(test_timeout, gentle=True))
  
      def _fake_output(self):
          if (os.environ.get('OS_STDOUT_CAPTURE') == 'True' or
                  os.environ.get('OS_STDOUT_CAPTURE') == '1'):
              stdout = self.useFixture(fixtures.StringStream('stdout')).stream
              self.useFixture(fixtures.MonkeyPatch('sys.stdout', stdout))
          if (os.environ.get('OS_STDERR_CAPTURE') == 'True' or
                  os.environ.get('OS_STDERR_CAPTURE') == '1'):
              stderr = self.useFixture(fixtures.StringStream('stderr')).stream
              self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
  
subject: Add common part of test-related tools to oslo