port: add --host to list command

This adds an option to allow filtering ports bound to a specific host
when listing them.

Change-Id: I747ed0f8b070074c51789576a158345f670fe733

Author: mnaser

openstackclient/network/v2/port.py

@@ -515,6 +515,10 @@ def get_parser(self, prog_name):
                    "This is the entity that uses the port (for example, "
                    "network:dhcp).")
         )
+        parser.add_argument(
+            '--host',
+            metavar='<host-id>',
+            help=_("List only ports bound to this host ID"))
         parser.add_argument(
             '--network',
             metavar='<network>',
@@ -603,6 +607,8 @@ def take_action(self, parsed_args):
             server = utils.find_resource(compute_client.servers,
                                          parsed_args.server)
             filters['device_id'] = server.id
+        if parsed_args.host:
+            filters['binding:host_id'] = parsed_args.host
         if parsed_args.network:
             network = network_client.find_network(parsed_args.network,
                                                   ignore_missing=False)

openstackclient/tests/unit/network/v2/test_port.py

@@ -1054,6 +1054,22 @@ def test_list_port_with_long(self):
         self.assertEqual(self.columns_long, columns)
         self.assertListItemEqual(self.data_long, list(data))
 
+    def test_port_list_host(self):
+        arglist = [
+            '--host', 'foobar',
+        ]
+        verifylist = [
+            ('host', 'foobar'),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        columns, data = self.cmd.take_action(parsed_args)
+        filters = {'binding:host_id': 'foobar'}
+
+        self.network.ports.assert_called_once_with(**filters)
+        self.assertEqual(self.columns, columns)
+        self.assertListItemEqual(self.data, list(data))
+
     def test_port_list_project(self):
         project = identity_fakes.FakeProject.create_one_project()
         self.projects_mock.get.return_value = project