new_contents: # 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 oslo_config import cfg
  from oslo_config import fixture as cfg_fixture
  import oslotest.base
  import webtest
  
  from designate.api import versions
  from designate.common import constants
  
  
  CONF = cfg.CONF
  
  
  class TestApiVersion(oslotest.base.BaseTestCase):
  
      def setUp(self):
          super(TestApiVersion, self).setUp()
          self.useFixture(cfg_fixture.Config(CONF))
  
      def test_add_a_version(self):
          api_url = 'http://localhost/v2'
          results = []
  
          versions._add_a_version(
              results, 'v2.1', api_url, constants.EXPERIMENTAL,
              '2022-08-10T00:00:00Z')
  
          self.assertEqual(1, len(results))
          self.assertEqual('v2.1', results[0]['id'])
          self.assertEqual(constants.EXPERIMENTAL, results[0]['status'])
          self.assertEqual('2022-08-10T00:00:00Z', results[0]['updated'])
          self.assertEqual(2, len(results[0]['links']))
  
      def test_get_versions(self):
          CONF.set_override('enable_host_header', False, 'service:api')
          CONF.set_override(
              'api_base_uri', 'http://127.0.0.2:9001/', 'service:api'
          )
  
          self.app = versions.factory({})
          self.client = webtest.TestApp(self.app)
  
          response = self.client.get('/')
          self.assertEqual(200, response.status_int)
          self.assertEqual('application/json', response.content_type)
  
          self.assertEqual(2, len(response.json['versions']))
          self.assertEqual(
              'http://127.0.0.2:9001/v2',
              response.json['versions'][0]['links'][0]['href']
          )
  
      def test_get_versions_with_enable_host_header(self):
          CONF.set_override('enable_host_header', True, 'service:api')
  
          self.app = versions.factory({})
          self.client = webtest.TestApp(self.app)
  
          response = self.client.get('/')
          self.assertEqual(200, response.status_int)
          self.assertEqual('application/json', response.content_type)
  
          self.assertEqual(2, len(response.json['versions']))
          self.assertEqual(
              'http://localhost/v2',
              response.json['versions'][0]['links'][0]['href']
          )
  
subject: Add basic api version test coverage