add venus api testcase for list api versions

add venus api testcase for list all api versions

Change-Id: Icc58e73646281ea35ea00d86e895dab0b4f3888e

venus_tempest_plugin/services/venus_rest_client.py

@@ -68,6 +68,11 @@ class VenusRestClient(rest_client.RestClient):
         resp, body = self.delete(url)
         return self._response_helper(resp, body)
 
+    def list_versions(self):
+        url = "/"
+        resp, body = self.get(url)
+        return self._response_helper(resp, body)
+
 
 def get_auth_provider(credentials, scope='project'):
     default_params = {

venus_tempest_plugin/tests/api/test_versions.py

@@ -0,0 +1,30 @@
+# Copyright 2023 Intel, Inc.
+# 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 venus_tempest_plugin.tests.api import base
+
+
+class TestVersions(base.BaseAPITest):
+
+    credentials = ['admin']
+
+    def test_list_api_versions(self):
+        response = self.os_admin.venus_client.list_versions()
+        self.assertEqual(response['v1.0']['id'], 'v1.0',
+                         "The first listed version should be v1.0")
+
+    @classmethod
+    def resource_cleanup(cls):
+        super(TestVersions, cls).resource_cleanup()