taskFaker.runTasks()
    assertThat(client.closed).isTrue()
    server.listener.assertExhausted() // Client should not have sent second close.
    client.listener.assertExhausted() // Server should not have sent second close.
  }

  @Test
  fun serverCloseBreaksReadMessageLoop() {
    server.webSocket!!.send("Hello!")
    server.webSocket!!.close(1000, "Bye!")
    assertThat(client.processNextFrame()).isTrue()

                        logger.debug("Sent {} to {}.", body, url);
                    }
                } else {
                    logger.warn("Failed to send {} to {}. HTTP Status is {}. {}", body, url, response.getHttpStatusCode(),
                            response.getContentAsString());
                }
            } catch (final IOException e) {
                logger.warn("Failed to send {} to {}.", body, url, e);
            }

    server.send(message3)
    clientListener.assertTextMessage(message3)

    // Empty client to server message.
    val message4 = ""
    client.send(message4)
    serverListener.assertTextMessage(message4)

    // Server to client message that shares context with message1.
    val message5 = message1 + message1
    server.send(message5)
    clientListener.assertTextMessage(message5)

        exchange.finishRequest()
      }
    } catch (e: IOException) {
      if (e is ConnectionShutdownException) {
        throw e // No request was sent so there's no response to read.
      }
      if (!exchange.hasFailure) {
        throw e // Don't attempt to read the response; we failed to send the request.
      }
      sendRequestException = e
    }

    try {
      if (responseBuilder == null) {

        flags = FLAG_ACK,
      )
      sink.flush()
    }
  }

  /**
   * HTTP/2 only. Send a push promise header block.
   *
   * A push promise contains all the headers that pertain to a server-initiated request, and a
   * `promisedStreamId` to which response frames will be delivered. Push promise frames are sent as
   * a part of the response to `streamId`. The `promisedStreamId` has a priority of one greater than

  }

  // Writer methods to enqueue frames. They'll be sent asynchronously by the writer thread.

  override fun send(text: String): Boolean = send(text.encodeUtf8(), OPCODE_TEXT)

  override fun send(bytes: ByteString): Boolean = send(bytes, OPCODE_BINARY)

  @Synchronized private fun send(
    data: ByteString,
    formatOpcode: Int,
  ): Boolean {
    // Don't send new frames after we've failed or enqueued a close frame.

    var finished: Boolean = false,
  ) : Sink {
    /**
     * Buffer of outgoing data. This batches writes of small writes into this sink as larges frames
     * written to the outgoing connection. Batching saves the (small) framing overhead.
     */
    private val sendBuffer = Buffer()

    /** Trailers to send at the end of the stream. */

        // Assume the server won't send a TLS ServerHello until we send a TLS ClientHello. If
        // that happens, then we will have buffered bytes that are needed by the SSLSocket!
        // This check is imperfect: it doesn't tell us whether a handshake will succeed, just
        // that it will almost certainly fail because the proxy has sent unexpected data.

     */
    protected Curl() {
        // nothing
    }

    /**
     * Creates a new CurlRequest with the HTTP GET method for the specified URL.
     *
     * @param url the URL to send the GET request to
     * @return a CurlRequest object configured with the GET method and the specified URL
     */
    public static CurlRequest get(final String url) {
        return new CurlRequest(Method.GET, url);
    }

    /**
     * Apply inbound settings and send an acknowledgement to the peer that provided them.
     *
     * We need to apply the settings and ack them atomically. This is because some HTTP/2
     * implementations (nghttp2) forbid peers from taking advantage of settings before they have
     * acknowledged! In particular, we shouldn't send frames that assume a new `initialWindowSize`
     * until we send the frame that acknowledges this new size.