@Test
  fun interruptReadingResponseBody() {
    val responseBodySize = 8 * 1024 * 1024 // 8 MiB.
    server.enqueue(
      MockResponse()
        .setBody(Buffer().write(ByteArray(responseBodySize)))
        .throttleBody((64 * 1024).toLong(), 125, TimeUnit.MILLISECONDS),
    ) // 500 Kbps
    server.start()
    val call =
      client.newCall(
        Request
          .Builder()
          .url(server.url("/"))

   * should yield one sleep for a total delay of 500ms.
   */
  @Test
  fun throttleRequest() {
    assumeNotWindows()
    server.enqueue(
      MockResponse
        .Builder()
        .throttleBody(3, 500, TimeUnit.MILLISECONDS)
        .build(),
    )
    val startNanos = System.nanoTime()
    val connection = server.url("/").toUrl().openConnection()
    connection.doOutput = true

  }

  @Test
  fun timeoutsUpdatedOnReusedConnections() {
    server.enqueue(MockResponse(body = "abc"))
    server.enqueue(
      MockResponse
        .Builder()
        .body("def")
        .throttleBody(1, 750, TimeUnit.MILLISECONDS)
        .build(),
    )

    // First request: time out after 1s.
    client =
      client
        .newBuilder()
        .readTimeout(Duration.ofSeconds(1))

    // Setting a low transfer speed ensures that stream discarding will time out.
    val builder =
      MockResponse
        .Builder()
        .throttleBody(6, 1, TimeUnit.SECONDS)
    transferKind.setBody(builder, "ABCDE\nFGHIJKLMNOPQRSTUVWXYZ", 1024)
    server.enqueue(builder.build())
    server.enqueue(
      MockResponse
        .Builder()