text: # 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.
  
  """Base test case for tests that do not rely on Tempest.
  
  To change behavoir that is common to all tests, please target
  the neutron.tests.sub_base module instead.
  
  If a test needs to import a dependency like Tempest, see
  neutron.tests.sub_base for a base test class that can be used without
  errors due to duplicate configuration definitions.
  """
  
  import logging as std_logging
  import os.path
  
  import fixtures
  from oslo.config import cfg
  from oslo.messaging import conffixture as messaging_conffixture
  
  from neutron.common import config
  from neutron.common import rpc as n_rpc
  from neutron.tests import fake_notifier
  from neutron.tests import sub_base
  
  
  CONF = cfg.CONF
  CONF.import_opt('state_path', 'neutron.common.config')
  LOG_FORMAT = sub_base.LOG_FORMAT
  
  ROOTDIR = os.path.dirname(__file__)
  ETCDIR = os.path.join(ROOTDIR, 'etc')
  
  
  def etcdir(*p):
      return os.path.join(ETCDIR, *p)
  
  
  def fake_use_fatal_exceptions(*args):
      return True
  
  
  def fake_consume_in_threads(self):
      return []
  
  
  bool_from_env = sub_base.bool_from_env
  
  
  class BaseTestCase(sub_base.SubBaseTestCase):
  
      @staticmethod
      def config_parse(conf=None, args=None):
          """Create the default configurations."""
          # neutron.conf.test includes rpc_backend which needs to be cleaned up
          if args is None:
              args = ['--config-file', etcdir('neutron.conf.test')]
          if conf is None:
              config.init(args=args)
          else:
              conf(args)
  
      def setUp(self):
          super(BaseTestCase, self).setUp()
  
          # suppress all but errors here
          capture_logs = bool_from_env('OS_LOG_CAPTURE')
          self.useFixture(
              fixtures.FakeLogger(
                  name='neutron.api.extensions',
                  format=LOG_FORMAT,
                  level=std_logging.ERROR,
                  nuke_handlers=capture_logs,
              ))
  
          self.temp_dir = self.useFixture(fixtures.TempDir()).path
          cfg.CONF.set_override('state_path', self.temp_dir)
  
          self.addCleanup(CONF.reset)
  
          self.useFixture(fixtures.MonkeyPatch(
              'neutron.common.exceptions.NeutronException.use_fatal_exceptions',
              fake_use_fatal_exceptions))
  
          self.setup_rpc_mocks()
          self.setup_config()
  
      def setup_rpc_mocks(self):
          # don't actually start RPC listeners when testing
          self.useFixture(fixtures.MonkeyPatch(
              'neutron.common.rpc.Connection.consume_in_threads',
              fake_consume_in_threads))
  
          self.useFixture(fixtures.MonkeyPatch(
              'oslo.messaging.Notifier', fake_notifier.FakeNotifier))
  
          self.messaging_conf = messaging_conffixture.ConfFixture(CONF)
          self.messaging_conf.transport_driver = 'fake'
          # NOTE(russellb) We want all calls to return immediately.
          self.messaging_conf.response_timeout = 0
          self.useFixture(self.messaging_conf)
  
          self.addCleanup(n_rpc.clear_extra_exmods)
          n_rpc.add_extra_exmods('neutron.test')
  
          self.addCleanup(n_rpc.cleanup)
          n_rpc.init(CONF)
  
      def setup_config(self):
          """Tests that need a non-default config can override this method."""
          self.config_parse()
  
      def config(self, **kw):
          """Override some configuration values.
  
          The keyword arguments are the names of configuration options to
          override and their values.
  
          If a group argument is supplied, the overrides are applied to
          the specified configuration option group.
  
          All overrides are automatically cleared at the end of the current
          test by the fixtures cleanup process.
          """
          group = kw.pop('group', None)
          for k, v in kw.iteritems():
              CONF.set_override(k, v, group)
  