Adding missing CLI command congress policy rule show

Change-Id: Ic78bc07d9d353c7b71947f1225ae6776878ba256
Closes-bug: 1379466

congressclient/osc/v1/policy.py

@@ -252,3 +252,29 @@ class ListPolicyRows(lister.Lister):
                        for i in xrange(0, len(results[0]['data']))]
         self.log.debug("Columns: " + str(columns))
         return (columns, (x['data'] for x in results))
+
+
+class ShowPolicyRule(show.ShowOne):
+    """Show a policy rule."""
+
+    log = logging.getLogger(__name__ + '.ShowPolicyRule')
+
+    def get_parser(self, prog_name):
+        parser = super(ShowPolicyRule, self).get_parser(prog_name)
+        parser.add_argument(
+            'policy_name',
+            metavar="<policy-name>",
+            help="Name or identifier of the policy")
+        parser.add_argument(
+            'id',
+            metavar="<rule>",
+            help="Policy rule id")
+
+        return parser
+
+    def take_action(self, parsed_args):
+        self.log.debug('take_action(%s)' % parsed_args)
+        client = self.app.client_manager.congressclient
+        data = client.show_policy_rule(parsed_args.policy_name,
+                                       parsed_args.id)
+        return zip(*sorted(six.iteritems(data)))

congressclient/tests/v1/test_policy.py

@@ -289,3 +289,29 @@ class TestSimulatePolicy(common.TestCongressBase):
         args['query'] = query
         args['trace'] = True
         lister.assert_called_with(policy_name, 'simulate', args)
+
+
+class TestGet(common.TestCongressBase):
+
+    def test_create_policy_rule(self):
+        policy_name = 'classification'
+        rule = "p(x) :- q(x)"
+        id = "e531f2b3-3d97-42c0-b3b5-b7b6ab532018"
+        response = {"comment": "None",
+                    "id": id,
+                    "rule": rule}
+
+        arglist = [policy_name, id]
+        verifylist = [
+            ('policy_name', policy_name),
+            ('id', id),
+        ]
+
+        mocker = mock.Mock(return_value=response)
+        self.app.client_manager.congressclient.show_policy_rule = mocker
+        cmd = policy.ShowPolicyRule(self.app, self.namespace)
+        parsed_args = self.check_parser(cmd, arglist, verifylist)
+        result = list(cmd.take_action(parsed_args))
+        filtered = [('comment', 'id', 'rule'),
+                    ('None', id, rule)]
+        self.assertEqual(filtered, result)

congressclient/v1/client.py

@@ -64,6 +64,11 @@ class Client(object):
             self.policy_rules_path % (policy_name, rule_id))
         return body
 
+    def show_policy_rule(self, policy_name, rule_id):
+        resp, body = self.httpclient.get(
+            self.policy_rules_path % (policy_name, rule_id))
+        return body
+
     def list_policy_rows(self, policy_name, table, trace=None):
         if trace:
             query = self.policy_rows_trace

setup.cfg

@@ -30,6 +30,7 @@ openstack.cli.extension =
 openstack.congressclient.v1 =
     congress_policy_rule_create = congressclient.osc.v1.policy:CreatePolicyRule
     congress_policy_rule_delete = congressclient.osc.v1.policy:DeletePolicyRule
+    congress_policy_rule_show = congressclient.osc.v1.policy:ShowPolicyRule
     congress_policy_rule_list = congressclient.osc.v1.policy:ListPolicyRules
     congress_policy_list = congressclient.osc.v1.policy:ListPolicy
     congress_policy_row_list = congressclient.osc.v1.policy:ListPolicyRows