new_contents: #!/usr/bin/env python
  #
  # Copyright 2011-2013 Colin Scott
  #
  # 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 unittest
  import sys
  import os
  import time
  
  sys.path.append(os.path.dirname(__file__) + "/../../..")
  
  from config.experiment_config_lib import ControllerConfig
  from sts.topology import MeshTopology
  from sts.simulation_state import SimulationConfig
  from sts.control_flow import RecordingSyncCallback
  
  class OpenflowBufferTest(unittest.TestCase):
    def basic_test(self):
      start_cmd = ('''./pox.py --verbose '''
                   '''openflow.discovery forwarding.l2_multi '''
                   '''sts.util.socket_mux.pox_monkeypatcher '''
                   '''openflow.of_01 --address=__address__ --port=__port__''')
  
      controllers = [ControllerConfig(start_cmd, cwd="pox")]
      topology_class = MeshTopology
      topology_params = "num_switches=2"
  
      simulation_config = SimulationConfig(controller_configs=controllers,
                                           topology_class=topology_class,
                                           topology_params=topology_params,
                                           multiplex_sockets=True)
      simulation = simulation_config.bootstrap(RecordingSyncCallback(None))
      simulation.set_record_only()
      simulation.connect_to_controllers()
      time.sleep(1)
      observed_events = simulation.unset_record_only()
      print "Observed events: %s" % str(observed_events)
      self.assertTrue(observed_events != [])
  
  if __name__ == '__main__':
    unittest.main()
  
subject: Add test for record_only mode