new_contents: '''
  Test hostdb
  '''
  
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  #  or more contributor license agreements.  See the NOTICE file
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  #  to you 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 os
  import requests
  import time
  
  import helpers
  
  import tsqa.test_cases
  
  
  class TestHostDBFailedDNS(tsqa.test_cases.DynamicHTTPEndpointCase, helpers.EnvironmentCase):
      '''
      Tests for how hostdb handles when there is no reachable resolver
      '''
      @classmethod
      def setUpEnv(cls, env):
          cls.configs['remap.config'].add_line('map / http://some_nonexistant_domain:{0}/'.format(cls.http_endpoint.address[1]))
  
          resolv_conf_path = os.path.join(env.layout.prefix, 'resolv.conf')
  
          cls.configs['records.config']['CONFIG'].update({
              'proxy.config.http.response_server_enabled': 2,  # only add server headers when there weren't any
              'proxy.config.hostdb.lookup_timeout': 1,
              'proxy.config.dns.resolv_conf': resolv_conf_path,
  
          })
  
          with open(resolv_conf_path, 'w') as fh:
              fh.write('nameserver 1.1.1.1\n')  # some non-existant nameserver
  
      def test_lookup_timeout(self):
          start = time.time()
          ret = requests.get(self.endpoint_url('/test'),
                             proxies=self.proxies,
                             )
          self.assertGreater(time.time() - start, self.configs['records.config']['CONFIG']['proxy.config.hostdb.lookup_timeout'])
          self.assertEqual(ret.status_code, 502)
          self.assertIn('ATS', ret.headers['server'])
  
  
subject: Add some initial teests for hostdb