for (shift in (lengthByteCount - 1) * 8 downTo 0 step 8) {
      sink.writeByte((v shr shift).toInt())
    }
  }

  fun writeBitString(bitString: BitString) {
    val sink = sink()
    sink.writeByte(bitString.unusedBitsCount)
    sink.write(bitString.byteString)
  }

  fun writeOctetString(byteString: ByteString) {
    sink().write(byteString)
  }

  fun writeUtf8(value: String) {

  /**
   * An HTTP body with alternating chunk sizes and chunk bodies. It is the caller's responsibility
   * to buffer chunks; typically by using a buffered sink with this sink.
   */
  private inner class ChunkedSink : Sink {
    private val timeout = ForwardingTimeout(socket.sink.timeout())
    private var closed: Boolean = false

    override fun timeout(): Timeout = timeout

    override fun write(
      source: Buffer,

    TestCharSink sink = new TestCharSink();

    assertFalse(sink.wasStreamOpened() || sink.wasStreamClosed());

    assertEquals(STRING.length(), source.copyTo(sink));
    assertTrue(source.wasStreamOpened() && source.wasStreamClosed());
    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());

    assertEquals(STRING, sink.getString());
  }

      @Override public MediaType contentType() {
        return MEDIA_TYPE_MARKDOWN;
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        sink.writeUtf8("Numbers\n");
        sink.writeUtf8("-------\n");
        for (int i = 2; i <= 997; i++) {
          sink.writeUtf8(String.format(" * %s = %s\n", i, factor(i)));
        }
      }

      private String factor(int n) {

        val socket = response.socket!!
        socket.sink.buffer().use { sink ->
          socket.source.buffer().use { source ->
            sink.writeUtf8("client says hello\n")
            sink.flush()

            assertThat(source.readUtf8Line()).isEqualTo("server says hello")

            sink.writeUtf8("client says goodbye\n")
            sink.flush()

      writeHeaders(socket.sink, response.trailers)
    }
  }

  @Throws(IOException::class)
  private fun writeHeaders(
    sink: BufferedSink,
    headers: Headers,
  ) {
    for ((name, value) in headers) {
      sink.writeUtf8(name)
      sink.writeUtf8(": ")
      sink.writeUtf8(value)
      sink.writeUtf8("\r\n")
    }
    sink.writeUtf8("\r\n")
    sink.flush()
  }

import okio.Buffer
import okio.Sink

/**
 * A sink that sleeps [periodDelayNanos] every [bytesPerPeriod] bytes. Unlike [okio.Throttler],
 * this permits any interval to be used.
 */
internal class ThrottledSink(
  private val socket: MockWebServerSocket,
  private val delegate: Sink,
  private val bytesPerPeriod: Long,
  private val periodDelayNanos: Long,
) : Sink by delegate {

  /**
   * Returns the number of bytes that will be written to sink in a call to [writeTo],
   * or -1 if that count is unknown.
   */
  @Throws(IOException::class)
  open fun contentLength(): Long = -1L

  /** Writes the content of this request to [sink]. */
  @Throws(IOException::class)
  abstract fun writeTo(sink: BufferedSink)

  /**

      override fun writeTo(sink: BufferedSink) {
        sink.writeUtf8("<el")
        sink.flush()
        throw IOException("failed to stream the XML")
      }
    }

    class ValidRequestBody : RequestBody() {
      override fun contentType(): MediaType = "application/xml".toMediaType()

      override fun writeTo(sink: BufferedSink) {
        sink.writeUtf8("<element/>")
        sink.flush()

}

internal class BufferMockResponseBody(
  val buffer: Buffer,
) : MockResponseBody {
  override val contentLength = buffer.size

  override fun writeTo(sink: BufferedSink) {
    buffer.copyTo(sink.buffer)
    sink.emitCompleteSegments()
  }