private ExecutionSequencer serializer;
  private SettableFuture<@Nullable Void> firstFuture;
  private TestCallable firstCallable;

  @Override
  public void setUp() throws Exception {
    executor = Executors.newCachedThreadPool();
    serializer = ExecutionSequencer.create();
    firstFuture = SettableFuture.create();
    firstCallable = new TestCallable(firstFuture);
  }

  @Override
  public void tearDown() throws Exception {

  @Test
  fun credentials() {
    val basic: String = Credentials.basic("", "")
  }

  @Test
  fun dispatcher() {
    var dispatcher = Dispatcher()
    dispatcher = Dispatcher(Executors.newCachedThreadPool())
    val maxRequests: Int = dispatcher.maxRequests
    dispatcher.maxRequests = 0
    val maxRequestsPerHost: Int = dispatcher.maxRequestsPerHost
    dispatcher.maxRequestsPerHost = 0

    mockWebServer: MockWebServer,
  ) {
    setUp(protocol, mockWebServer)
    server.enqueue(MockResponse(body = "A"))
    server.enqueue(MockResponse(body = "A"))
    val executor = Executors.newCachedThreadPool(threadFactory("HttpOverHttp2Test"))
    val countDownLatch = CountDownLatch(2)
    executor.execute(AsyncRequest("/r1", countDownLatch))
    executor.execute(AsyncRequest("/r2", countDownLatch))