Append existing information during port set

Existing --fixed-ip and --binding-profile information is
currently overwritten when a user executes 'port set', but
actually that data should be appended.
This patch fixes the issue.

Closes-Bug: #1564453
Change-Id: I62500c10ccbbc68167f24e9d4fa49e85345d82c4

openstackclient/network/v2/port.py

@@ -30,6 +30,7 @@ LOG = logging.getLogger(__name__)
 def _format_admin_state(state):
     return 'UP' if state else 'DOWN'
 
+
 _formatters = {
     'admin_state_up': _format_admin_state,
     'allowed_address_pairs': utils.format_list_of_dicts,
@@ -383,17 +384,24 @@ class SetPort(command.Command):
 
         _prepare_fixed_ips(self.app.client_manager, parsed_args)
         attrs = _get_attrs(self.app.client_manager, parsed_args)
-
-        if parsed_args.no_fixed_ip:
-            attrs['fixed_ips'] = []
-        if parsed_args.no_binding_profile:
+        obj = client.find_port(parsed_args.port, ignore_missing=False)
+        if 'binding:profile' in attrs:
+            attrs['binding:profile'].update(obj.binding_profile)
+        elif parsed_args.no_binding_profile:
             attrs['binding:profile'] = {}
+        if 'fixed_ips' in attrs:
+            # When user unsets the fixed_ips, obj.fixed_ips = [{}].
+            # Adding the obj.fixed_ips list to attrs['fixed_ips']
+            # would therefore add an empty dictionary, while we need
+            # to append the attrs['fixed_ips'] iff there is some info
+            # in the obj.fixed_ips. Therefore I have opted for this `for` loop
+            attrs['fixed_ips'] += [ip for ip in obj.fixed_ips if ip]
+        elif parsed_args.no_fixed_ip:
+            attrs['fixed_ips'] = []
 
         if attrs == {}:
             msg = "Nothing specified to be set"
             raise exceptions.CommandError(msg)
-
-        obj = client.find_port(parsed_args.port, ignore_missing=False)
         client.update_port(obj, **attrs)
 
 

openstackclient/tests/network/v2/test_port.py

@@ -268,7 +268,6 @@ class TestSetPort(TestPort):
 
     def setUp(self):
         super(TestSetPort, self).setUp()
-
         self.fake_subnet = network_fakes.FakeSubnet.create_one_subnet()
         self.network.find_subnet = mock.Mock(return_value=self.fake_subnet)
         self.network.find_port = mock.Mock(return_value=self._port)
@@ -295,6 +294,26 @@ class TestSetPort(TestPort):
         self.network.update_port.assert_called_once_with(self._port, **attrs)
         self.assertIsNone(result)
 
+    def test_append_fixed_ip(self):
+        _testport = network_fakes.FakePort.create_one_port(
+            {'fixed_ips': [{'ip_address': '0.0.0.1'}]})
+        self.network.find_port = mock.Mock(return_value=_testport)
+        arglist = [
+            '--fixed-ip', 'ip-address=10.0.0.12',
+            _testport.name,
+        ]
+        verifylist = [
+            ('fixed_ip', [{'ip-address': '10.0.0.12'}]),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+        result = self.cmd.take_action(parsed_args)
+        attrs = {
+            'fixed_ips': [
+                {'ip_address': '10.0.0.12'}, {'ip_address': '0.0.0.1'}],
+        }
+        self.network.update_port.assert_called_once_with(_testport, **attrs)
+        self.assertIsNone(result)
+
     def test_set_this(self):
         arglist = [
             '--disable',