text: # Copyright 2013 IBM Corp.
  #
  #    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.
  
  from tempest.api.network import base
  from tempest import test
  
  
  class DHCPAgentSchedulersTestJSON(base.BaseAdminNetworkTest):
  
      @classmethod
      def skip_checks(cls):
          super(DHCPAgentSchedulersTestJSON, cls).skip_checks()
          if not test.is_extension_enabled('dhcp_agent_scheduler', 'network'):
              msg = "dhcp_agent_scheduler extension not enabled."
              raise cls.skipException(msg)
  
      @classmethod
      def resource_setup(cls):
          super(DHCPAgentSchedulersTestJSON, cls).resource_setup()
          # Create a network and make sure it will be hosted by a
          # dhcp agent: this is done by creating a regular port
          cls.network = cls.create_network()
          cls.subnet = cls.create_subnet(cls.network)
          cls.port = cls.create_port(cls.network)
  
      @test.idempotent_id('5032b1fe-eb42-4a64-8f3b-6e189d8b5c7d')
      def test_list_dhcp_agent_hosting_network(self):
          self.admin_networks_client.list_dhcp_agents_on_hosting_network(
              self.network['id'])
  
      @test.idempotent_id('30c48f98-e45d-4ffb-841c-b8aad57c7587')
      def test_list_networks_hosted_by_one_dhcp(self):
          body = self.admin_networks_client.list_dhcp_agents_on_hosting_network(
              self.network['id'])
          agents = body['agents']
          self.assertIsNotNone(agents)
          agent = agents[0]
          self.assertTrue(self._check_network_in_dhcp_agent(
              self.network['id'], agent))
  
      def _check_network_in_dhcp_agent(self, network_id, agent):
          network_ids = []
          body = self.admin_agents_client.list_networks_hosted_by_one_dhcp_agent(
              agent['id'])
          networks = body['networks']
          for network in networks:
              network_ids.append(network['id'])
          return network_id in network_ids
  
      @test.idempotent_id('a0856713-6549-470c-a656-e97c8df9a14d')
      def test_add_remove_network_from_dhcp_agent(self):
          # The agent is now bound to the network, we can free the port
          self.ports_client.delete_port(self.port['id'])
          self.ports.remove(self.port)
          agent = dict()
          agent['agent_type'] = None
          body = self.admin_agents_client.list_agents()
          agents = body['agents']
          for a in agents:
              if a['agent_type'] == 'DHCP agent':
                  agent = a
                  break
          self.assertEqual(agent['agent_type'], 'DHCP agent', 'Could not find '
                           'DHCP agent in agent list though dhcp_agent_scheduler'
                           ' is enabled.')
          network = self.create_network()
          network_id = network['id']
          if self._check_network_in_dhcp_agent(network_id, agent):
              self._remove_network_from_dhcp_agent(network_id, agent)
              self._add_dhcp_agent_to_network(network_id, agent)
          else:
              self._add_dhcp_agent_to_network(network_id, agent)
              self._remove_network_from_dhcp_agent(network_id, agent)
  
      def _remove_network_from_dhcp_agent(self, network_id, agent):
          self.admin_agents_client.delete_network_from_dhcp_agent(
              agent_id=agent['id'],
              network_id=network_id)
          self.assertFalse(self._check_network_in_dhcp_agent(
              network_id, agent))
  
      def _add_dhcp_agent_to_network(self, network_id, agent):
          self.admin_agents_client.add_dhcp_agent_to_network(
              agent['id'], network_id=network_id)
          self.assertTrue(self._check_network_in_dhcp_agent(
              network_id, agent))
  