}

    /**
     * Set the delayed time of the response body to [delay]. This applies to the response body
     * only; response headers are not affected.
     */
    fun bodyDelay(
      delay: Long,
      unit: TimeUnit,
    ) = apply {
      bodyDelayNanos = unit.toNanos(delay)
    }

    fun headersDelay(
      delay: Long,
      unit: TimeUnit,
    ) = apply {

 * task should not be executed again. Otherwise it returns a delay until the next execution.
 *
 * A task has at most one next execution. If the same task instance is scheduled multiple times, the
 * earliest one wins. This applies to both executions scheduled with [TaskRunner.Queue.schedule] and
 * those implied by the returned execution delay.
 *
 * Cancellation
 * ------------
 *

   * The target execution time is implemented on a best-effort basis. If another task in this queue
   * is running when that time is reached, that task is allowed to complete before this task is
   * started. Similarly the task will be delayed if the host lacks compute resources.
   *
   * @throws RejectedExecutionException if the queue is shut down and the task is not cancelable.
   */
  fun schedule(
    task: Task,
    delayNanos: Long = 0L,
  ) {

  }

  /**
   * Throttle the request body by sleeping 500ms after every 3 bytes. With a 6-byte request, this
   * should yield one sleep for a total delay of 500ms.
   */
  @Test
  fun throttleRequest() {
    assumeNotWindows()
    server.enqueue(
      MockResponse()
        .throttleBody(3, 500, TimeUnit.MILLISECONDS),
    )

    sink.writeUtf8(data)
    sink.close()
    return result
  }

  private fun cancelLater(
    call: Call,
    delay: Long,
  ): Thread {
    val thread =
      object : Thread("canceler") {
        override fun run() {
          try {
            sleep(delay)
          } catch (e: InterruptedException) {
            throw AssertionError()
          }
          call.cancel()

  @get:JvmName("cipherSuite") val cipherSuite: CipherSuite,
  /** Returns a possibly-empty list of certificates that identify this peer. */
  @get:JvmName("localCertificates") val localCertificates: List<Certificate>,
  // Delayed provider of peerCertificates, to allow lazy cleaning.
  peerCertificatesFn: () -> List<Certificate>,
) {
  /** Returns a possibly-empty list of certificates that identify the remote peer. */
  @get:JvmName("peerCertificates")

      eachQueue@ for (queue in readyQueues) {
        val candidate = queue.futureTasks[0]
        val candidateDelay = maxOf(0L, candidate.nextExecuteNanoTime - now)

        when {
          // Compute the delay of the soonest-executable task.
          candidateDelay > 0L -> {
            minDelayNanos = minOf(candidateDelay, minDelayNanos)
            continue@eachQueue
          }

  ) {
    setUp(protocol, mockWebServer)
    // Ping every 500 ms, starting at 500 ms.
    client =
      client.newBuilder()
        .pingInterval(Duration.ofMillis(500))
        .build()

    // Delay the response to give 1 ping enough time to be sent and replied to.
    server.enqueue(
      MockResponse.Builder()
        .bodyDelay(750, TimeUnit.MILLISECONDS)
        .body("ABC")
        .build(),
    )

  fun setBodyDelay(
    delay: Long,
    unit: TimeUnit,
  ) = apply {
    bodyDelayAmount = delay
    bodyDelayUnit = unit
  }

  fun getBodyDelay(unit: TimeUnit): Long = unit.convert(bodyDelayAmount, bodyDelayUnit)

  fun setHeadersDelay(
    delay: Long,
    unit: TimeUnit,
  ) = apply {
    headersDelayAmount = delay
    headersDelayUnit = unit
  }

        // Minimise test flakiness due to possible race conditions with connections closing.
        // Some number of tests will report here, but not fail due to this delay.
        println("Delaying to avoid flakes")
        Thread.sleep(500L)
        println("After delay: " + connectionPool.connectionCount())
      }

      connectionPool.evictAll()
      assertEquals(0, connectionPool.connectionCount()) {