OSC Extension Show

Implement Neutron feature of Extension Show into
OpenStack Client.

Change-Id: Ifecb794838cb3bf8c2466d178345349db3cd4003
Implements: blueprint extension-show

6 files changed, 155 insertions, 0 deletions

diff --git a/doc/source/command-objects/extension.rst b/doc/source/command-objects/extension.rst
index dff30fa1..4d71bbc7 100644
--- a/doc/source/command-objects/extension.rst
+++ b/doc/source/command-objects/extension.rst
@@ -39,3 +39,20 @@ List API extensions
 .. option:: --long
 
     List additional fields in output
+
+extension show
+--------------
+
+Show API extension
+
+.. program:: extension show
+.. code:: bash
+
+    openstack extension show
+        <extension>
+
+.. _extension_show:
+.. describe:: <extension>
+
+   Extension to display. Currently, only network extensions are supported.
+   (Name or Alias)
diff --git a/openstackclient/common/extension.py b/openstackclient/common/extension.py
index de480016..07c407f6 100644
--- a/openstackclient/common/extension.py
+++ b/openstackclient/common/extension.py
@@ -134,3 +134,32 @@ class ListExtension(command.Lister):
                 LOG.warning(message)
 
         return (columns, extension_tuples)
+
+
+class ShowExtension(command.ShowOne):
+    _description = _("Show API extension")
+
+    def get_parser(self, prog_name):
+        parser = super(ShowExtension, self).get_parser(prog_name)
+        parser.add_argument(
+            'extension',
+            metavar='<extension>',
+            help=_('Extension to display. '
+                   'Currently, only network extensions are supported. '
+                   '(Name or Alias)'),
+        )
+        return parser
+
+    def take_action(self, parsed_args):
+        client = self.app.client_manager.network
+        columns = ('Alias', 'Description', 'Links', 'Name',
+                   'Namespace', 'Updated')
+        ext = str(parsed_args.extension)
+        obj = client.find_extension(ext)
+        dict_tuples = (utils.get_item_properties(
+                       obj,
+                       columns,
+                       formatters={},)
+                       )
+
+        return columns, dict_tuples
diff --git a/openstackclient/tests/functional/common/test_extension.py b/openstackclient/tests/functional/common/test_extension.py
new file mode 100644
index 00000000..7c527eae
--- /dev/null
+++ b/openstackclient/tests/functional/common/test_extension.py
@@ -0,0 +1,42 @@
+# Copyright (c) 2017, Intel Corporation.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import json
+
+from openstackclient.tests.functional import base
+
+
+class TestExtension(base.TestCase):
+    """Functional tests for extension."""
+
+    def test_extension_list(self):
+        """Test extension list."""
+        json_output = json.loads(self.openstack(
+            'extension list -f json ' + '--network')
+        )
+        self.assertEqual(
+            'Default Subnetpools',
+            json_output[0]['Name'],
+        )
+
+    def test_extension_show(self):
+        """Test extension show."""
+        name = 'agent'
+        json_output = json.loads(self.openstack(
+            'extension show -f json ' + name)
+        )
+        self.assertEqual(
+            name,
+            json_output.get('Alias'))
diff --git a/openstackclient/tests/unit/common/test_extension.py b/openstackclient/tests/unit/common/test_extension.py
index bf856ed1..68fdf17d 100644
--- a/openstackclient/tests/unit/common/test_extension.py
+++ b/openstackclient/tests/unit/common/test_extension.py
@@ -19,6 +19,7 @@ from openstackclient.tests.unit import fakes
 from openstackclient.tests.unit.identity.v2_0 import fakes as identity_fakes
 from openstackclient.tests.unit.network.v2 import fakes as network_fakes
 from openstackclient.tests.unit import utils
+from openstackclient.tests.unit import utils as tests_utils
 from openstackclient.tests.unit.volume.v2 import fakes as volume_fakes
 
 
@@ -242,3 +243,60 @@ class TestExtensionList(TestExtension):
         ), )
         self._test_extension_list_helper(arglist, verifylist, datalist)
         self.volume_extensions_mock.show_all.assert_called_with()
+
+
+class TestExtensionShow(TestExtension):
+    extension_details = (
+        network_fakes.FakeExtension.create_one_extension()
+    )
+
+    columns = (
+        'Alias',
+        'Description',
+        'Links',
+        'Name',
+        'Namespace',
+        'Updated'
+    )
+
+    data = (
+        extension_details.alias,
+        extension_details.description,
+        extension_details.links,
+        extension_details.name,
+        extension_details.namespace,
+        extension_details.updated
+    )
+
+    def setUp(self):
+        super(TestExtensionShow, self).setUp()
+
+        self.cmd = extension.ShowExtension(self.app, None)
+
+        self.app.client_manager.network.find_extension = mock.Mock(
+            return_value=self.extension_details)
+
+    def test_show_no_options(self):
+        arglist = []
+        verifylist = []
+
+        self.assertRaises(tests_utils.ParserException, self.check_parser,
+                          self.cmd, arglist, verifylist)
+
+    def test_show_all_options(self):
+        arglist = [
+            self.extension_details.alias,
+        ]
+        verifylist = [
+            ('extension', self.extension_details.alias),
+        ]
+
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        columns, data = self.cmd.take_action(parsed_args)
+
+        self.app.client_manager.network.find_extension.assert_called_with(
+            self.extension_details.alias)
+
+        self.assertEqual(self.columns, columns)
+        self.assertEqual(self.data, data)
diff --git a/releasenotes/notes/bp-extension-show-6f7e31a27dad0dc9.yaml b/releasenotes/notes/bp-extension-show-6f7e31a27dad0dc9.yaml
new file mode 100644
index 00000000..21ed6470
--- /dev/null
+++ b/releasenotes/notes/bp-extension-show-6f7e31a27dad0dc9.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Added `openstack extension show` command to allow users
+    to view the details of the extension. Currently works only for
+    network extensions.
+
+    [Blueprint `extension-show <https://blueprints.launchpad.net/python-openstackclient/+spec/extension-show>`_]
diff --git a/setup.cfg b/setup.cfg
index 2aa88740..9869d5a2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -46,6 +46,7 @@ openstack.common =
     availability_zone_list = openstackclient.common.availability_zone:ListAvailabilityZone
     configuration_show = openstackclient.common.configuration:ShowConfiguration
     extension_list = openstackclient.common.extension:ListExtension
+    extension_show = openstackclient.common.extension:ShowExtension
     limits_show = openstackclient.common.limits:ShowLimits
     quota_set = openstackclient.common.quota:SetQuota
     quota_show = openstackclient.common.quota:ShowQuota