Add '--dhcp' and '--no-dhcp' options to os subnet list cmd

This patch adds '--dhcp' and '--no-dhcp' options to filter
subnets resulted by os subnet list command.

Change-Id: Ib574cc54594845bc5c5afc38bf44e3b224d33b17
Partial-Bug: #1610883

doc/source/command-objects/subnet.rst

@@ -152,6 +152,7 @@ List subnets
     os subnet list
         [--long]
         [--ip-version {4,6}]
+        [--dhcp | --no-dhcp]
 
 .. option:: --long
 
@@ -162,6 +163,14 @@ List subnets
     List only subnets of given IP version in output.
     Allowed values for IP version are 4 and 6.
 
+.. option:: --dhcp
+
+    List subnets which have DHCP enabled
+
+.. option:: --no-dhcp
+
+    List subnets which have DHCP disabled
+
 subnet set
 ----------
 

openstackclient/network/v2/subnet.py

@@ -341,12 +341,27 @@ class ListSubnet(command.Lister):
             help=_("List only subnets of given IP version in output."
                    "Allowed values for IP version are 4 and 6."),
         )
+        dhcp_enable_group = parser.add_mutually_exclusive_group()
+        dhcp_enable_group.add_argument(
+            '--dhcp',
+            action='store_true',
+            help=_("List subnets which have DHCP enabled")
+        )
+        dhcp_enable_group.add_argument(
+            '--no-dhcp',
+            action='store_true',
+            help=_("List subnets which have DHCP disabled")
+        )
         return parser
 
     def take_action(self, parsed_args):
         filters = {}
         if parsed_args.ip_version:
             filters['ip_version'] = parsed_args.ip_version
+        if parsed_args.dhcp:
+            filters['enable_dhcp'] = True
+        elif parsed_args.no_dhcp:
+            filters['enable_dhcp'] = False
         data = self.app.client_manager.network.subnets(**filters)
 
         headers = ('ID', 'Name', 'Network', 'Subnet')

openstackclient/tests/network/v2/test_subnet.py

@@ -584,6 +584,38 @@ class TestListSubnet(TestSubnet):
         self.assertEqual(self.columns, columns)
         self.assertEqual(self.data, list(data))
 
+    def test_subnet_list_dhcp(self):
+        arglist = [
+            '--dhcp',
+        ]
+        verifylist = [
+            ('dhcp', True),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        columns, data = self.cmd.take_action(parsed_args)
+        filters = {'enable_dhcp': True}
+
+        self.network.subnets.assert_called_once_with(**filters)
+        self.assertEqual(self.columns, columns)
+        self.assertEqual(self.data, list(data))
+
+    def test_subnet_list_no_dhcp(self):
+        arglist = [
+            '--no-dhcp',
+        ]
+        verifylist = [
+            ('no_dhcp', True),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        columns, data = self.cmd.take_action(parsed_args)
+        filters = {'enable_dhcp': False}
+
+        self.network.subnets.assert_called_once_with(**filters)
+        self.assertEqual(self.columns, columns)
+        self.assertEqual(self.data, list(data))
+
 
 class TestSetSubnet(TestSubnet):
 

releasenotes/notes/bug-1610883-e6345c32a35cc290.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Make ``subnet list`` command supports listing up subnets with
+    dhcp enabled/disabled by adding ``--dhcp`` and ``--no-dhcp``
+    options to the command.
+    [Bug `1610883 <https://bugs.launchpad.net/bugs/1610883>`_]