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 httplib2
  
  from oslo_serialization import jsonutils as json
  from oslotest import mockpatch
  
  from tempest.services.compute.json import tenant_usages_client
  from tempest.tests import base
  from tempest.tests import fake_auth_provider
  
  
  class TestTenantUsagesClient(base.TestCase):
  
      FAKE_SERVER_USAGES = [{
          "ended_at": None,
          "flavor": "m1.tiny",
          "hours": 1.0,
          "instance_id": "1f1deceb-17b5-4c04-84c7-e0d4499c8fe0",
          "local_gb": 1,
          "memory_mb": 512,
          "name": "new-server-test",
          "started_at": "2012-10-08T20:10:44.541277",
          "state": "active",
          "tenant_id": "openstack",
          "uptime": 3600,
          "vcpus": 1
          }]
  
      FAKE_TENANT_USAGES = [{
          "server_usages": FAKE_SERVER_USAGES,
          "start": "2012-10-08T21:10:44.587336",
          "stop": "2012-10-08T22:10:44.587336",
          "tenant_id": "openstack",
          "total_hours": 1,
          "total_local_gb_usage": 1,
          "total_memory_mb_usage": 512,
          "total_vcpus_usage": 1
          }]
  
      def setUp(self):
          super(TestTenantUsagesClient, self).setUp()
          fake_auth = fake_auth_provider.FakeAuthProvider()
          self.client = tenant_usages_client.TenantUsagesClient(
              fake_auth, 'compute', 'regionOne')
  
      def _test_list_tenant_usages(self, bytes_body=False):
          serialized_body = json.dumps({"tenant_usages":
                                        self.FAKE_TENANT_USAGES})
          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.list_tenant_usages()
          self.assertEqual({"tenant_usages": self.FAKE_TENANT_USAGES}, resp)
  
      def test_list_tenant_usages_with_str_body(self):
          self._test_list_tenant_usages()
  
      def test_list_tenant_usages_with_bytes_body(self):
          self._test_list_tenant_usages(bytes_body=True)
  
      def _test_show_tenant_usage(self, bytes_body=False):
          serialized_body = json.dumps({"tenant_usage":
                                        self.FAKE_TENANT_USAGES[0]})
          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_tenant_usage('openstack')
          self.assertEqual({"tenant_usage": self.FAKE_TENANT_USAGES[0]}, resp)
  
      def test_show_tenant_usage_with_str_body(self):
          self._test_show_tenant_usage()
  
      def test_show_tenant_usage_with_bytes_body(self):
          self._test_show_tenant_usage(bytes_body=True)
  
subject: Add unit tests for tenant_usages_client