val dispatcher = Dispatcher(executor)
  val listener = RecordingEventListener()
  var client =
    clientTestRule.newClientBuilder()
      .dns { throw UnknownHostException() }
      .dispatcher(dispatcher)
      .eventListenerFactory(clientTestRule.wrap(listener))
      .build()

  @BeforeEach
  fun setUp() {
    dispatcher.maxRequests = 20
    dispatcher.maxRequestsPerHost = 10
    listener.forbidLock(dispatcher)
  }

  @Test