text: # Copyright (c) 2013 OpenStack Foundation.
  #
  # 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 mock
  
  
  def patch_fake_ryu_client():
      ryu_mod = mock.Mock()
      ryu_app_mod = ryu_mod.app
      ryu_app_client = ryu_app_mod.client
      conf_switch_key = ryu_app_mod.conf_switch_key
      conf_switch_key.OVSDB_ADDR = 'ovsdb_addr'
      conf_switch_key.OVS_TUNNEL_ADDR = 'ovs_tunnel_addr'
      rest_nw_id = ryu_app_mod.rest_nw_id
      rest_nw_id.NW_ID_EXTERNAL = '__NW_ID_EXTERNAL__'
      rest_nw_id.NW_ID_RESERVED = '__NW_ID_RESERVED__'
      rest_nw_id.NW_ID_VPORT_GRE = '__NW_ID_VPORT_GRE__'
      rest_nw_id.NW_ID_UNKNOWN = '__NW_ID_UNKNOWN__'
      rest_nw_id.RESERVED_NETWORK_IDS = [
          rest_nw_id.NW_ID_EXTERNAL,
          rest_nw_id.NW_ID_RESERVED,
          rest_nw_id.NW_ID_VPORT_GRE,
          rest_nw_id.NW_ID_UNKNOWN,
      ]
      return mock.patch.dict('sys.modules',
                             {'ryu': ryu_mod,
                              'ryu.app': ryu_app_mod,
                              'ryu.app.client': ryu_app_client,
                              'ryu.app.conf_switch_key': conf_switch_key,
                              'ryu.app.rest_nw_id': rest_nw_id})
  