new_contents: # Copyright (C) 2013 Nippon Telegraph and Telephone Corporation.
  # Copyright (C) 2013 Isaku Yamahata <yamahata at private email ne jp>
  #
  # 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.
  
  # vim: tabstop=4 shiftwidth=4 softtabstop=4
  
  import unittest
  import logging
  from nose.tools import eq_
  
  
  LOG = logging.getLogger('test_ofproto')
  
  
  class TestOfprotCommon(unittest.TestCase):
      """ Test case for ofproto
      """
  
      def test_ofp_event(self):
          import ryu.ofproto
          reload(ryu.ofproto)
          import ryu.controller.ofp_event
          reload(ryu.controller.ofp_event)
  
      def test_ofproto(self):
          # When new version of OFP support is added,
          # this test must be updated.
          import ryu.ofproto
          reload(ryu.ofproto)
          ofp_modules = ryu.ofproto.get_ofp_modules()
  
          import ryu.ofproto.ofproto_v1_0
          import ryu.ofproto.ofproto_v1_2
          import ryu.ofproto.ofproto_v1_3
          eq_(set(ofp_modules.keys()), set([ryu.ofproto.ofproto_v1_0.OFP_VERSION,
                                            ryu.ofproto.ofproto_v1_2.OFP_VERSION,
                                            ryu.ofproto.ofproto_v1_3.OFP_VERSION,
                                            ]))
          consts_mods = set([ofp_mod[0] for ofp_mod in ofp_modules.values()])
          eq_(consts_mods, set([ryu.ofproto.ofproto_v1_0,
                                ryu.ofproto.ofproto_v1_2,
                                ryu.ofproto.ofproto_v1_3,
                                ]))
  
          parser_mods = set([ofp_mod[1] for ofp_mod in ofp_modules.values()])
          import ryu.ofproto.ofproto_v1_0_parser
          import ryu.ofproto.ofproto_v1_2_parser
          import ryu.ofproto.ofproto_v1_3_parser
          eq_(parser_mods, set([ryu.ofproto.ofproto_v1_0_parser,
                                ryu.ofproto.ofproto_v1_2_parser,
                                ryu.ofproto.ofproto_v1_3_parser,
                                ]))
  
subject: add unit test for ofproto automatic detection