assertThat(parse("permessage-deflate; server_max_window_bits=8")).isEqualTo(
      WebSocketExtensions(perMessageDeflate = true, serverMaxWindowBits = 8),
    )
    assertThat(parse("permessage-deflate; server_max_window_bits=\"8\"")).isEqualTo(
      WebSocketExtensions(perMessageDeflate = true, serverMaxWindowBits = 8),
    )
    assertThat(parse("permessage-deflate; server_max_window_bits=15")).isEqualTo(

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

  @Throws(Exception::class)
  fun serverMaxWindowBitsTooLow() {
    extensionNegotiationFailure("permessage-deflate; server_max_window_bits=7")
  }

  @Test
  @Throws(Exception::class)
  fun serverMaxWindowBitsTooHigh() {
    extensionNegotiationFailure("permessage-deflate; server_max_window_bits=16")
  }

  @Test
  @Throws(Exception::class)
  fun serverMaxWindowBitsJustRight() {

    // If the server returned a value for client_max_window_bits, fail the web socket.
    if (clientMaxWindowBits != null) return false

    // If the server returned an illegal server_max_window_bits, fail the web socket.
    if (serverMaxWindowBits != null && serverMaxWindowBits !in 8..15) return false

    // Success.
    return true
  }

  @Throws(IOException::class)