Support creating unaddress neutron port

Introduce an option '--no-fixed-ip' on port create command.
If this option is specified and '--fixed-ip' is unspecified,
OSC will send a request to neutron with 'fixed_ips' as an empty
list, which will create an unaddress neutron port.

Note: The use cases of unaddress port was outlined in:
https://specs.openstack.org/openstack/neutron-specs/specs/liberty/unaddressed-port.html

(dtroyer: add Depends-On for Zuul v3 test)

Depends-On: I39e8e49243ab0bda631600715c971c55a34e2fd9
Change-Id: Ibe38598acbbcd0d353c952fc2a6fa67780762151
Closes-Bug: #1717829

1 files changed, 26 insertions, 0 deletions

diff --git a/openstackclient/tests/unit/network/v2/test_port.py b/openstackclient/tests/unit/network/v2/test_port.py
index 45e1045d..3f751818 100644
--- a/openstackclient/tests/unit/network/v2/test_port.py
+++ b/openstackclient/tests/unit/network/v2/test_port.py
@@ -356,6 +356,32 @@ class TestCreatePort(TestPort):
         self.assertEqual(self.columns, columns)
         self.assertEqual(self.data, data)
 
+    def test_create_with_no_fixed_ips(self):
+        arglist = [
+            '--network', self._port.network_id,
+            '--no-fixed-ip',
+            'test-port',
+        ]
+        verifylist = [
+            ('network', self._port.network_id),
+            ('enable', True),
+            ('no_fixed_ip', True),
+            ('name', 'test-port'),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        columns, data = (self.cmd.take_action(parsed_args))
+
+        self.network.create_port.assert_called_once_with(**{
+            'admin_state_up': True,
+            'network_id': self._port.network_id,
+            'fixed_ips': [],
+            'name': 'test-port',
+        })
+
+        self.assertEqual(self.columns, columns)
+        self.assertEqual(self.data, data)
+
     def test_create_port_with_allowed_address_pair_ipaddr(self):
         pairs = [{'ip_address': '192.168.1.123'},
                  {'ip_address': '192.168.1.45'}]