fun createRequestBody(
    request: Request,
    duplex: Boolean,
  ): Sink {
    this.isDuplex = duplex
    val contentLength = request.body!!.contentLength()
    eventListener.requestBodyStart(call)
    val rawRequestBody = codec.createRequestBody(request, contentLength)
    return RequestBodySink(rawRequestBody, contentLength)
  }

  @Throws(IOException::class)
  fun flushRequest() {
    try {
      codec.flushRequest()

    assertThat(body.contentType().toString())
      .isEqualTo("multipart/mixed; boundary=123")
    assertThat(body.parts.size).isEqualTo(1)
    assertThat(body.contentLength()).isEqualTo(33L)
    val buffer = Buffer()
    body.writeTo(buffer)
    assertThat(body.contentLength()).isEqualTo(buffer.size)
    assertThat(buffer.readUtf8()).isEqualTo(expected)
  }

  @Test
  fun threeParts() {
    val expected =
      """

      !response.promisesBody() -> newFixedLengthSource(0)
      response.isChunked -> newChunkedSource(response.request.url)
      else -> {
        val contentLength = response.headersContentLength()
        if (contentLength != -1L) {
          newFixedLengthSource(contentLength)
        } else {
          newUnknownLengthSource()
        }
      }
    }
  }

  override fun trailers(): Headers {

            }
            final long contentLength = getContentLength(out);
            if (contentLength > maxContentLength) {
                throw new MaxLengthExceededException(
                        "The content length (" + contentLength + " byte) is over " + maxContentLength + " byte.");
            }
            if (contentLength == 0) {
                if (logger.isDebugEnabled()) {

  sizeMapper: (T) -> Int,
): T {
  val contentLength = contentLength()
  if (contentLength > Int.MAX_VALUE) {
    throw IOException("Cannot buffer entire body for content length: $contentLength")
  }

  val bytes = source().use(consumer)
  val size = sizeMapper(bytes)
  if (contentLength != -1L && contentLength != size.toLong()) {
    throw IOException("Content-Length ($contentLength) and stream length ($size) disagree")
  }

		}
	}
}

// Provides a fully populated http request instance, fails otherwise.
func mustNewRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
	req, err := newTestRequest(method, urlStr, contentLength, body)
	if err != nil {
		t.Fatalf("Unable to initialize new http request %s", err)
	}
	return req
}

        throw e
      }

      val tookMs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs)

      val responseBody = response.body!!
      val contentLength = responseBody.contentLength()
      val bodySize = if (contentLength != -1L) "$contentLength-byte" else "unknown-length"
      logger.log(
        buildString {
          append("<-- ${response.code}")

    val closed = AtomicBoolean()
    val body: ResponseBody =
      object : ResponseBody() {
        override fun contentType(): MediaType? {
          return null
        }

        override fun contentLength(): Long {
          return 5
        }

        override fun source(): BufferedSource {
          val source = Buffer().writeUtf8("hello")
          return object : ForwardingSource(source) {

          }
          source.close()
        }
      }

    val contentType = response.header("Content-Type")
    val contentLength = response.body.contentLength()
    return response.newBuilder()
      .body(RealResponseBody(contentType, contentLength, cacheWritingSource.buffer()))
      .build()
  }

  companion object {

        this.executionTime = executionTime;
    }

    @Override
    public Long getContentLength() {
        return contentLength;
    }

    @Override
    public void setContentLength(final Long contentLength) {
        this.contentLength = contentLength;
    }

    @Override
    public Long getLastModified() {
        return lastModified;
    }

    @Override