List Domains Test Case-V3

Adds a test script "test_domains.py" so as to test the list
domains functionality. And added required support functions
to identity_client.py of both v3/xml and v3/json interfaces.

Change-Id: I931be12bc2ea7a08b0272dfe145c13e195e69029
Implements: blueprint keystone-v3-domain-api-test
diff --git a/tempest/api/identity/admin/v3/test_domains.py b/tempest/api/identity/admin/v3/test_domains.py
new file mode 100644
index 0000000..8d019fe
--- /dev/null
+++ b/tempest/api/identity/admin/v3/test_domains.py
@@ -0,0 +1,54 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2013 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 tempest.api.identity import base
+from tempest.common.utils.data_utils import rand_name
+from tempest.test import attr
+
+
+class DomainsTestJSON(base.BaseIdentityAdminTest):
+    _interface = 'json'
+
+    def _delete_domain(self, domain_id):
+        # It is necessary to disable the domian before deleting,
+        # or else it would result in unauthorized error
+        _, body = self.v3_client.update_domain(domain_id, enabled=False)
+        resp, _ = self.v3_client.delete_domain(domain_id)
+        self.assertEqual(204, resp.status)
+
+    @attr(type='smoke')
+    def test_list_domains(self):
+        #Test to list domains
+        domain_ids = list()
+        fetched_ids = list()
+        for _ in range(3):
+            _, domain = self.v3_client.create_domain(
+                rand_name('domain-'), description=rand_name('domain-desc-'))
+            # Delete the domian at the end of this method
+            self.addCleanup(self._delete_domain, domain['id'])
+            domain_ids.append(domain['id'])
+        # List and Verify Domains
+        resp, body = self.v3_client.list_domains()
+        self.assertEqual(resp['status'], '200')
+        for d in body:
+            fetched_ids.append(d['id'])
+        missing_doms = [d for d in domain_ids if d not in fetched_ids]
+        self.assertEqual(0, len(missing_doms))
+
+
+class DomainsTestXML(DomainsTestJSON):
+    _interface = 'xml'