List enabled Designate API versions

Test uses: Admin, Primary and Not Authorized users, to list
all enabled API versions.
Test is PASS if the received version/s list is in:
[['v1'], ['v2'], ['v1', 'v2']]

Change-Id: I829011ef0c13f0fd942c75dce826e550ff9b313d

designate_tempest_plugin/services/dns/v2/__init__.py

@@ -39,9 +39,11 @@ from designate_tempest_plugin.services.dns.v2.json.zone_exports_client import \
     ZoneExportsClient
 from designate_tempest_plugin.services.dns.v2.json.zone_imports_client import \
     ZoneImportsClient
+from designate_tempest_plugin.services.dns.v2.json.api_version_client import \
+    ApiVersionClient
 
 __all__ = ['BlacklistsClient', 'DesignateLimitClient', 'PoolClient',
            'PtrClient', 'QuotasClient', 'RecordsetClient', 'ServiceClient',
            'TldClient', 'TransferAcceptClient', 'TransferRequestClient',
            'TsigkeyClient', 'ZonesClient', 'ZoneExportsClient',
-           'ZoneImportsClient']
+           'ZoneImportsClient', 'ApiVersionClient']

designate_tempest_plugin/services/dns/v2/json/api_version_client.py

@@ -0,0 +1,27 @@
+# Copyright 2021 Red Hat.
+#
+# 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 designate_tempest_plugin.services.dns.v2.json import base
+
+
+class ApiVersionClient(base.DnsClientV2Base):
+
+    @base.handle_errors
+    def list_enabled_api_versions(self):
+        """Show all enabled API versions
+
+        :return: Dictionary containing version details
+        """
+        resp, body = self.get('/')
+        self.expected_success(self.LIST_STATUS_CODES, resp.status)
+        return resp, self.deserialize(resp, body)

designate_tempest_plugin/tests/api/v2/test_enabled_api_version.py

@@ -0,0 +1,71 @@
+# Copyright 2021 Red Hat.
+#
+# 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 requests
+
+from oslo_log import log as logging
+from tempest.lib import decorators
+
+from designate_tempest_plugin.tests import base
+from designate_tempest_plugin.services.dns.v2.json import base as service_base
+
+from tempest import config
+
+CONF = config.CONF
+LOG = logging.getLogger(__name__)
+
+
+class DesignateApiVersion(base.BaseDnsV2Test, service_base.DnsClientV2Base):
+    credentials = ['admin', 'primary']
+
+    @classmethod
+    def setup_credentials(cls):
+        # Do not create network resources for these test.
+        cls.set_network_resources()
+        super(DesignateApiVersion, cls).setup_credentials()
+
+    @classmethod
+    def setup_clients(cls):
+        super(DesignateApiVersion, cls).setup_clients()
+
+        cls.admin_client = cls.os_admin.dns_v2.ApiVersionClient()
+        cls.primary_client = cls.os_primary.dns_v2.ApiVersionClient()
+
+    @decorators.idempotent_id('aa84986e-f2ad-11eb-b58d-74e5f9e2a801')
+    def test_list_enabled_api_versions(self):
+        for user in ['admin', 'primary', 'not_auth_user']:
+            if user == 'admin':
+                versions = self.admin_client.list_enabled_api_versions()[1][
+                    'versions']['values']
+            if user == 'primary':
+                versions = self.primary_client.list_enabled_api_versions()[1][
+                    'versions']['values']
+            if user == 'not_auth_user':
+                uri = CONF.identity.uri.split('identity')[0] + 'dns'
+                response = requests.get(uri, verify=False)
+                headers = {
+                    k.lower(): v.lower() for k, v in response.headers.items()}
+                versions = self.deserialize(
+                    headers, str(response.text))['versions']['values']
+
+            LOG.info('Received enabled API versions for {} '
+                     'user are:{}'.format(user, versions))
+            for item in versions:
+                enabled_ids = [
+                    item['id'] for key in item.keys() if key == 'id']
+            LOG.info('Enabled versions IDs are:{}'.format(enabled_ids))
+            possible_options = [['v1'], ['v2'], ['v1', 'v2']]
+            self.assertIn(
+                enabled_ids, possible_options,
+                'Failed, received version: {} is not in possible options'
+                ' list:{}'.format(enabled_ids, possible_options))