new_contents: # 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 uuid
  
  from openstack.network.v2 import network
  from openstack.network.v2 import port
  from openstack.network.v2 import subnet
  from openstack.tests.functional import base
  
  
  class TestPort(base.BaseFunctionalTest):
  
      NET_NAME = uuid.uuid4().hex
      SUB_NAME = uuid.uuid4().hex
      PORT_NAME = uuid.uuid4().hex
      UPDATE_NAME = uuid.uuid4().hex
      IPV4 = 4
      CIDR = "10.100.0.0/24"
      NET_ID = None
      SUB_ID = None
      PORT_ID = None
  
      @classmethod
      def setUpClass(cls):
          super(TestPort, cls).setUpClass()
          net = cls.conn.network.create_network(name=cls.NET_NAME)
          assert isinstance(net, network.Network)
          cls.assertIs(cls.NET_NAME, net.name)
          cls.NET_ID = net.id
          sub = cls.conn.network.create_subnet(name=cls.SUB_NAME,
                                               ip_version=cls.IPV4,
                                               network_id=cls.NET_ID,
                                               cidr=cls.CIDR)
          assert isinstance(sub, subnet.Subnet)
          cls.assertIs(cls.SUB_NAME, sub.name)
          cls.SUB_ID = sub.id
          prt = cls.conn.network.create_port(name=cls.PORT_NAME,
                                             network_id=cls.NET_ID)
          assert isinstance(prt, port.Port)
          cls.assertIs(cls.PORT_NAME, prt.name)
          cls.PORT_ID = prt.id
  
      @classmethod
      def tearDownClass(cls):
          sot = cls.conn.network.delete_port(cls.PORT_ID, ignore_missing=False)
          cls.assertIs(None, sot)
          sot = cls.conn.network.delete_subnet(cls.SUB_ID, ignore_missing=False)
          cls.assertIs(None, sot)
          sot = cls.conn.network.delete_network(cls.NET_ID, ignore_missing=False)
          cls.assertIs(None, sot)
  
      def test_find(self):
          sot = self.conn.network.find_port(self.PORT_NAME)
          self.assertEqual(self.PORT_ID, sot.id)
  
      def test_get(self):
          sot = self.conn.network.get_port(self.PORT_ID)
          self.assertEqual(self.PORT_ID, sot.id)
          self.assertEqual(self.PORT_NAME, sot.name)
          self.assertEqual(self.NET_ID, sot.network_id)
  
      def test_list(self):
          ids = [o.id for o in self.conn.network.ports()]
          self.assertIn(self.PORT_ID, ids)
  
      def test_updta(self):
          sot = self.conn.network.update_port(self.PORT_ID,
                                              name=self.UPDATE_NAME)
          self.assertEqual(self.UPDATE_NAME, sot.name)
  
subject: Add funtcional tests for port