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

  @Test
  @Throws(Exception::class)
  fun serverMaxWindowBitsJustRight() {
    successfulExtensions("permessage-deflate; server_max_window_bits=15")
  }

  @Throws(Exception::class)
  private fun successfulExtensions(extensionsHeader: String) {
    webServer.enqueue(