level = 6
		fallthrough
	case 2 <= level && level <= 9:
		d.compressionLevel = levels[level]
		d.initDeflate()
		d.fill = (*compressor).fillDeflate
		d.step = (*compressor).deflate
	default:
		return fmt.Errorf("flate: invalid compression level %d: want value in range [-2, 9]", level)
	}
	return nil
}

func (d *compressor) reset(w io.Writer) {
	d.w.reset(w)
	d.sync = false
	d.err = nil

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

    val goldenValue = "".encodeUtf8()

    val deflated = deflater.deflate(goldenValue)
    assertThat(deflated).isEqualTo("00".decodeHex())
    val inflated = inflater.inflate(deflated)

    assertThat(inflated).isEqualTo(goldenValue)
  }

  @Test fun `inflate deflate with 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,

 * 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

	compressors.Store(Deflate, Compressor(func(w io.Writer) (io.WriteCloser, error) { return newFlateWriter(w), nil }))

	decompressors.Store(Store, Decompressor(io.NopCloser))
	decompressors.Store(Deflate, Decompressor(newFlateReader))
}

// RegisterDecompressor allows custom decompressors for a specified method ID.
// The common methods [Store] and [Deflate] are built in.

	// Override the default Deflate compressor with a higher compression level.

	// Create a buffer to write our archive to.
	buf := new(bytes.Buffer)

	// Create a new zip archive.
	w := zip.NewWriter(buf)

	// Register a custom Deflate compressor.
	w.RegisterCompressor(zip.Deflate, func(out io.Writer) (io.WriteCloser, error) {
		return flate.NewWriter(out, flate.BestCompression)
	})

/**
 * Specifies the compression level of an archives contents.
 */
public enum ZipEntryCompression {
    /** Contents are not compressed */
    STORED,

    /** Contents are compressed using the 'deflate' algorithm */
    DEFLATED

  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)

    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")
  }

    /**
     * Sets the compression level of the entries of the archive. If set to {@link ZipEntryCompression#DEFLATED} (the default), each entry is
     * compressed using the DEFLATE algorithm. If set to {@link ZipEntryCompression#STORED} the entries of the archive are left uncompressed.
     *
     * @param entryCompression {@code STORED} or {@code DEFLATED}
     */
    public void setEntryCompression(ZipEntryCompression entryCompression) {