.isEqualTo(WebSocketExtensions(perMessageDeflate = true, unknownValues = true))
    assertThat(parse("permessage-deflate; unknown_parameter=15"))
      .isEqualTo(WebSocketExtensions(perMessageDeflate = true, unknownValues = true))
    assertThat(parse("permessage-deflate; unknown_parameter=15; unknown_parameter=15"))
      .isEqualTo(WebSocketExtensions(perMessageDeflate = true, unknownValues = true))
  }

  @Test
  fun unexpectedValue() {

 *     client_max_window_bits="15"; server_no_context_takeover; client_no_context_takeover
 * ```
 *
 * If any other extension or parameter is specified, then [unknownValues] will be true. Such
 * responses should be refused as their web socket extensions will not be understood.
 *
 * Note that [java.util.zip.Deflater] is hardcoded to use 15 bits (32 KiB) for