Add OpenstackClient plugin for cluster policy binding show

This change implements the "openstack cluster policy binding show" command
  Based on the existing senlin command: senlin cluster-policy-show

Change-Id: I3637560cd07e574ae51d1a2be2f36fcdba8f5469
Blueprint: senlin-support-python-openstackclient

senlinclient/osc/v1/cluster_policy.py

@@ -13,8 +13,10 @@
 """Clustering v1 cluster policy action implementations"""
 
 import logging
+import six
 
 from cliff import lister
+from cliff import show
 from openstackclient.common import utils
 
 from senlinclient.common.i18n import _
@@ -83,3 +85,32 @@ class ClusterPolicyList(lister.Lister):
             (utils.get_item_properties(p, columns, formatters=formatters)
              for p in policies)
         )
+
+
+class ClusterPolicyShow(show.ShowOne):
+    """Show a specific policy that is bound to the specified cluster."""
+
+    log = logging.getLogger(__name__ + ".ClusterPolicyShow")
+
+    def get_parser(self, prog_name):
+        parser = super(ClusterPolicyShow, self).get_parser(prog_name)
+        parser.add_argument(
+            '--policy',
+            metavar='<policy>',
+            required=True,
+            help=_('ID or name of the policy to query on')
+        )
+        parser.add_argument(
+            'cluster',
+            metavar='<cluster>',
+            help=_('ID or name of the cluster to query on')
+        )
+        return parser
+
+    def take_action(self, parsed_args):
+        self.log.debug("take_action(%s)", parsed_args)
+        senlin_client = self.app.client_manager.clustering
+        policy = senlin_client.get_cluster_policy(parsed_args.policy,
+                                                  parsed_args.cluster)
+        columns = list(six.iterkeys(policy))
+        return columns, utils.get_dict_properties(policy.to_dict(), columns)

senlinclient/tests/unit/osc/v1/test_cluster_policy.py

@@ -12,6 +12,7 @@
 
 import mock
 
+from openstack.cluster.v1 import cluster_policy as sdk_cluster_policy
 
 from senlinclient.osc.v1 import cluster_policy as osc_cluster_policy
 from senlinclient.tests.unit.osc.v1 import fakes
@@ -72,3 +73,29 @@ class TestClusterPolicyList(TestClusterPolicy):
             name='my_policy',
             **self.args)
         self.assertEqual(self.columns, columns)
+
+
+class TestClusterPolicyShow(TestClusterPolicy):
+    get_response = {"cluster_policy": {
+        "cluster_id": "7d85f602-a948-4a30-afd4-e84f47471c15",
+        "cluster_name": "my_cluster",
+        "enabled": True,
+        "id": "06be3a1f-b238-4a96-a737-ceec5714087e",
+        "policy_id": "714fe676-a08f-4196-b7af-61d52eeded15",
+        "policy_name": "my_policy",
+        "policy_type": "senlin.policy.deletion-1.0"
+    }}
+
+    def setUp(self):
+        super(TestClusterPolicyShow, self).setUp()
+        self.cmd = osc_cluster_policy.ClusterPolicyShow(self.app, None)
+        self.mock_client.get_cluster_policy = mock.Mock(
+            return_value=sdk_cluster_policy.ClusterPolicy(None,
+                                                          self.get_response))
+
+    def test_cluster_policy_show(self):
+        arglist = ['--policy', 'my_policy', 'my_cluster']
+        parsed_args = self.check_parser(self.cmd, arglist, [])
+        self.cmd.take_action(parsed_args)
+        self.mock_client.get_cluster_policy.assert_called_with('my_policy',
+                                                               'my_cluster')

setup.cfg

@@ -31,6 +31,7 @@ openstack.cli.extension =
 
 openstack.clustering.v1 =
     cluster_policy_binding_list = senlinclient.osc.v1.cluster_policy:ClusterPolicyList
+    cluster_policy_binding_show = senlinclient.osc.v1.cluster_policy:ClusterPolicyShow
     cluster_create = senlinclient.osc.v1.cluster:CreateCluster
     cluster_delete = senlinclient.osc.v1.cluster:DeleteCluster
     cluster_list = senlinclient.osc.v1.cluster:ListCluster