Migrated extensions_client.py from tempest

This migrates the above files from tempest. This includes tempest commits:

 * extensions_client.py     : I8dcb70ce6ba2af59c7636c5f83157dd058fb1df3
 * test_extensions_client.py: I3ad6761651cec5e66012d08e6b63322f53286a5c
 * extensions.py            : Ica929c402a3d042ae751302384e68853eb28b405

to see the commit history for these files refer to the above Change-Ids
in the tempest repository.

Partially implements blueprint migrate-service-clients-to-tempest-lib

Change-Id: Ic658f09649ed9498fe6d3e7792a7c370772f165b

tempest_lib/api_schema/response/compute/v2_1/extensions.py

@@ -0,0 +1,47 @@
+# Copyright 2014 NEC 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.
+
+list_extensions = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'extensions': {
+                'type': 'array',
+                'items': {
+                    'type': 'object',
+                    'properties': {
+                        'updated': {
+                            'type': 'string',
+                            'format': 'data-time'
+                        },
+                        'name': {'type': 'string'},
+                        'links': {'type': 'array'},
+                        'namespace': {
+                            'type': 'string',
+                            'format': 'uri'
+                        },
+                        'alias': {'type': 'string'},
+                        'description': {'type': 'string'}
+                    },
+                    'additionalProperties': False,
+                    'required': ['updated', 'name', 'links', 'namespace',
+                                 'alias', 'description']
+                }
+            }
+        },
+        'additionalProperties': False,
+        'required': ['extensions']
+    }
+}

tempest_lib/services/compute/extensions_client.py

@@ -0,0 +1,34 @@
+# Copyright 2012 OpenStack Foundation
+# 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.
+
+from oslo_serialization import jsonutils as json
+
+from tempest_lib.api_schema.response.compute.v2_1 import extensions as schema
+from tempest_lib.common import rest_client
+
+
+class ExtensionsClient(rest_client.RestClient):
+
+    def list_extensions(self):
+        url = 'extensions'
+        resp, body = self.get(url)
+        body = json.loads(body)
+        self.validate_response(schema.list_extensions, resp, body)
+        return rest_client.ResponseBody(resp, body)
+
+    def show_extension(self, extension_alias):
+        resp, body = self.get('extensions/%s' % extension_alias)
+        body = json.loads(body)
+        return rest_client.ResponseBody(resp, body)

tempest_lib/tests/services/compute/test_extensions_client.py

@@ -0,0 +1,65 @@
+# Copyright 2015 NEC 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.
+
+from tempest_lib.services.compute import extensions_client
+from tempest_lib.tests import fake_auth_provider
+from tempest_lib.tests.services.compute import base
+
+
+class TestExtensionsClient(base.BaseComputeServiceTest):
+
+    FAKE_SHOW_EXTENSION = {
+        "extension": {
+            "updated": "2011-06-09T00:00:00Z",
+            "name": "Multinic",
+            "links": [],
+            "namespace":
+            "http://docs.openstack.org/compute/ext/multinic/api/v1.1",
+            "alias": "NMN",
+            "description": u'\u2740(*\xb4\u25e1`*)\u2740'
+        }
+    }
+
+    def setUp(self):
+        super(TestExtensionsClient, self).setUp()
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.client = extensions_client.ExtensionsClient(
+            fake_auth, 'compute', 'regionOne')
+
+    def _test_list_extensions(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_extensions,
+            'tempest_lib.common.rest_client.RestClient.get',
+            {"extensions": []},
+            bytes_body)
+
+    def test_list_extensions_with_str_body(self):
+        self._test_list_extensions()
+
+    def test_list_extensions_with_bytes_body(self):
+        self._test_list_extensions(bytes_body=True)
+
+    def _test_show_extension(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.show_extension,
+            'tempest_lib.common.rest_client.RestClient.get',
+            self.FAKE_SHOW_EXTENSION,
+            bytes_body,
+            extension_alias="NMN")
+
+    def test_show_extension_with_str_body(self):
+        self._test_show_extension()
+
+    def test_show_extension_with_bytes_body(self):
+        self._test_show_extension(bytes_body=True)