compute: Add missing options for 'server group list'

Add pagination parameters, '--limit' and '--offset'. It's unfortunate
that we can't use '--marker' like elsewhere but that requires
server-side support to be truly effective.

Change-Id: I186adc8cdf28e9c540ad22bca6684d9dd892976a
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

2 files changed, 80 insertions, 5 deletions

diff --git a/openstackclient/compute/v2/server_group.py b/openstackclient/compute/v2/server_group.py
index 783fdbfe..32dd1937 100644
--- a/openstackclient/compute/v2/server_group.py
+++ b/openstackclient/compute/v2/server_group.py
@@ -177,11 +177,47 @@ class ListServerGroup(command.Lister):
             default=False,
             help=_("List additional fields in output")
         )
+        # TODO(stephenfin): This should really be a --marker option, but alas
+        # the API doesn't support that for some reason
+        parser.add_argument(
+            '--offset',
+            metavar='<offset>',
+            type=int,
+            default=None,
+            help=_(
+                'Index from which to start listing servers. This should '
+                'typically be a factor of --limit. Display all servers groups '
+                'if not specified.'
+            ),
+        )
+        parser.add_argument(
+            '--limit',
+            metavar='<limit>',
+            type=int,
+            default=None,
+            help=_(
+                "Maximum number of server groups to display. "
+                "If limit is greater than 'osapi_max_limit' option of Nova "
+                "API, 'osapi_max_limit' will be used instead."
+            ),
+        )
         return parser
 
     def take_action(self, parsed_args):
         compute_client = self.app.client_manager.compute
-        data = compute_client.server_groups.list(parsed_args.all_projects)
+
+        kwargs = {}
+
+        if parsed_args.all_projects:
+            kwargs['all_projects'] = parsed_args.all_projects
+
+        if parsed_args.offset:
+            kwargs['offset'] = parsed_args.offset
+
+        if parsed_args.limit:
+            kwargs['limit'] = parsed_args.limit
+
+        data = compute_client.server_groups.list(**kwargs)
 
         policy_key = 'Policies'
         if compute_client.api_version >= api_versions.APIVersion("2.64"):
diff --git a/openstackclient/tests/unit/compute/v2/test_server_group.py b/openstackclient/tests/unit/compute/v2/test_server_group.py
index 732c1881..3ed19e27 100644
--- a/openstackclient/tests/unit/compute/v2/test_server_group.py
+++ b/openstackclient/tests/unit/compute/v2/test_server_group.py
@@ -326,10 +326,13 @@ class TestServerGroupList(TestServerGroup):
         verifylist = [
             ('all_projects', False),
             ('long', False),
+            ('limit', None),
+            ('offset', None),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
         columns, data = self.cmd.take_action(parsed_args)
-        self.server_groups_mock.list.assert_called_once_with(False)
+
+        self.server_groups_mock.list.assert_called_once_with()
 
         self.assertCountEqual(self.list_columns, columns)
         self.assertCountEqual(self.list_data, tuple(data))
@@ -342,14 +345,49 @@ class TestServerGroupList(TestServerGroup):
         verifylist = [
             ('all_projects', True),
             ('long', True),
+            ('limit', None),
+            ('offset', None),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
         columns, data = self.cmd.take_action(parsed_args)
-        self.server_groups_mock.list.assert_called_once_with(True)
+        self.server_groups_mock.list.assert_called_once_with(
+            all_projects=True)
 
         self.assertCountEqual(self.list_columns_long, columns)
         self.assertCountEqual(self.list_data_long, tuple(data))
 
+    def test_server_group_list_with_limit(self):
+        arglist = [
+            '--limit', '1',
+        ]
+        verifylist = [
+            ('all_projects', False),
+            ('long', False),
+            ('limit', 1),
+            ('offset', None),
+        ]
+
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+        self.cmd.take_action(parsed_args)
+
+        self.server_groups_mock.list.assert_called_once_with(limit=1)
+
+    def test_server_group_list_with_offset(self):
+        arglist = [
+            '--offset', '5',
+        ]
+        verifylist = [
+            ('all_projects', False),
+            ('long', False),
+            ('limit', None),
+            ('offset', 5),
+        ]
+
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+        self.cmd.take_action(parsed_args)
+
+        self.server_groups_mock.list.assert_called_once_with(offset=5)
+
 
 class TestServerGroupListV264(TestServerGroupV264):
 
@@ -400,7 +438,7 @@ class TestServerGroupListV264(TestServerGroupV264):
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
         columns, data = self.cmd.take_action(parsed_args)
-        self.server_groups_mock.list.assert_called_once_with(False)
+        self.server_groups_mock.list.assert_called_once_with()
 
         self.assertCountEqual(self.list_columns, columns)
         self.assertCountEqual(self.list_data, tuple(data))
@@ -416,7 +454,8 @@ class TestServerGroupListV264(TestServerGroupV264):
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
         columns, data = self.cmd.take_action(parsed_args)
-        self.server_groups_mock.list.assert_called_once_with(True)
+        self.server_groups_mock.list.assert_called_once_with(
+            all_projects=True)
 
         self.assertCountEqual(self.list_columns_long, columns)
         self.assertCountEqual(self.list_data_long, tuple(data))