new_contents: # 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.
  
  import copy
  import httplib2
  
  from oslo_serialization import jsonutils as json
  from oslotest import mockpatch
  
  from tempest.services.compute.json import quota_classes_client
  from tempest.tests import base
  from tempest.tests import fake_auth_provider
  
  
  class TestQuotaClassesClient(base.TestCase):
  
      FAKE_QUOTA_CLASS_SET = {
          "injected_file_content_bytes": 10240,
          "metadata_items": 128,
          "server_group_members": 10,
          "server_groups": 10,
          "ram": 51200,
          "floating_ips": 10,
          "key_pairs": 100,
          "id": u'\u2740(*\xb4\u25e1`*)\u2740',
          "instances": 10,
          "security_group_rules": 20,
          "security_groups": 10,
          "injected_files": 5,
          "cores": 20,
          "fixed_ips": -1,
          "injected_file_path_bytes": 255,
          }
  
      def setUp(self):
          super(TestQuotaClassesClient, self).setUp()
          fake_auth = fake_auth_provider.FakeAuthProvider()
          self.client = quota_classes_client.QuotaClassesClient(
              fake_auth, 'compute', 'regionOne')
  
      def _test_show_quota_class_set(self, bytes_body=False):
          serialized_body = json.dumps({
              "quota_class_set": self.FAKE_QUOTA_CLASS_SET})
          if bytes_body:
              serialized_body = serialized_body.encode('utf-8')
  
          mocked_resp = (httplib2.Response({'status': 200}), serialized_body)
          self.useFixture(mockpatch.Patch(
              'tempest.common.service_client.ServiceClient.get',
              return_value=mocked_resp))
          resp = self.client.show_quota_class_set("test")
          self.assertEqual(self.FAKE_QUOTA_CLASS_SET, resp)
  
      def test_show_quota_class_set_with_str_body(self):
          self._test_show_quota_class_set()
  
      def test_show_quota_class_set_with_bytes_body(self):
          self._test_show_quota_class_set(bytes_body=True)
  
      def test_update_quota_class_set(self):
          fake_quota_class_set = copy.deepcopy(self.FAKE_QUOTA_CLASS_SET)
          fake_quota_class_set.pop("id")
          serialized_body = json.dumps({"quota_class_set": fake_quota_class_set})
  
          mocked_resp = (httplib2.Response({'status': 200}), serialized_body)
          self.useFixture(mockpatch.Patch(
              'tempest.common.service_client.ServiceClient.put',
              return_value=mocked_resp))
          resp = self.client.update_quota_class_set("test")
          self.assertEqual(fake_quota_class_set, resp)
  
subject: Add unit test for quota_classes_client