private val deflatedBytes = Buffer()

  private val deflater =
    Deflater(
      Deflater.DEFAULT_COMPRESSION,
      // nowrap (omits zlib header):
      true,
    )

  private val deflaterSink = DeflaterSink(deflatedBytes, deflater)

  /** Deflates [buffer] in place as described in RFC 7692 section 7.2.1. */
  @Throws(IOException::class)
  fun deflate(buffer: Buffer) {
    require(deflatedBytes.size == 0L)

    val deflated = deflater.deflate(goldenValue)
    assertThat(deflated.size).isLessThan(goldenValue.size)
    val inflated = inflater.inflate(deflated)

    assertThat(inflated).isEqualTo(goldenValue)
  }

  @Test fun `inflate deflate empty message`() {
    val deflater = MessageDeflater(false)
    val inflater = MessageInflater(false)

    val goldenValue = "".encodeUtf8()

    }

    /**
     * Compresses data using LZ77 algorithm (implemented using Java's Deflater).
     */
    private byte[] compressLZ77(byte[] data, int offset, int length) throws CIFSException {
        try {
            Deflater deflater = new Deflater(COMPRESSION_LEVEL, false);
            deflater.setInput(data, offset, length);
            deflater.finish();

            ByteArrayOutputStream baos = new ByteArrayOutputStream(length);

 * Sec-WebSocket-Extensions: permessage-deflate; client_no_context_takeover
 * Sec-WebSocket-Extensions: permessage-deflate; server_max_window_bits="15"
 * Sec-WebSocket-Extensions: permessage-deflate; server_max_window_bits=15
 * Sec-WebSocket-Extensions: permessage-deflate; server_no_context_takeover
 * Sec-WebSocket-Extensions: permessage-deflate; server_no_context_takeover;
 *     client_no_context_takeover

  }

  @Test
  fun emptyParameters() {
    assertThat(parse("permessage-deflate;"))
      .isEqualTo(WebSocketExtensions(perMessageDeflate = true))
  }

  @Test
  fun repeatedPerMessageDeflate() {
    assertThat(parse("permessage-deflate, permessage-deflate; server_no_context_takeover"))
      .isEqualTo(
        WebSocketExtensions(
          perMessageDeflate = true,
          serverNoContextTakeover = true,

		Method: Deflate,
		Mode:   0644,
	},
	{
		Name:   "setuid",
		Data:   []byte("setuid file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSetuid,
	},
	{
		Name:   "setgid",
		Data:   []byte("setgid file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSetgid,
	},
	{
		Name:   "symlink",
		Data:   []byte("../link/target"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSymlink,
	},

    successfulExtensions("permessage-deflate")
  }

  @Test
  @Throws(Exception::class)
  fun compressedMessagesNoClientContextTakeover() {
    successfulExtensions("permessage-deflate; client_no_context_takeover")
  }

  @Test
  @Throws(Exception::class)
  fun compressedMessagesNoServerContextTakeover() {
    successfulExtensions("permessage-deflate; server_no_context_takeover")
  }

  private val inflater =
    Inflater(
      // nowrap (omits zlib header):
      true,
    )

  private val inflaterSource = InflaterSource(deflatedBytes, inflater)

  /** Inflates [buffer] in place as described in RFC 7692 section 7.2.2. */
  @Throws(IOException::class)
  fun inflate(buffer: Buffer) {
    require(deflatedBytes.size == 0L)

    if (noContextTakeover) {
      inflater.reset()

    }

    val recorded = server.takeRequest()
    assertThat(recorded.headers["Accept"]).isEqualTo("text/plain")
    assertThat(recorded.headers["Accept-Encoding"]).isEqualTo("gzip, x-gzip, deflate")
    assertThat(recorded.headers["User-Agent"]!!).startsWith("Apache-HttpClient/")
  }

    val response =
      response("https://example.com/", s) {
        header("Content-Encoding", "deflate")
      }

    val decompressed = zstdInterceptor.decompress(response)
    assertThat(decompressed.header("Content-Encoding")).isEqualTo("deflate")

    val responseString = decompressed.body.string()
    assertThat(responseString).isEqualTo("hello unknown algorithm world")
  }