1F0C1..1F0CF  ; valid                  ;      ; NV8    # 6.0  PLAYING CARD ACE OF DIAMONDS..PLAYING CARD BLACK JOKER
1F0D0         ; disallowed                             # NA   <reserved-1F0D0>
1F0D1..1F0DF  ; valid                  ;      ; NV8    # 6.0  PLAYING CARD ACE OF CLUBS..PLAYING CARD WHITE JOKER
1F0E0..1F0F5  ; valid                  ;      ; NV8    # 7.0  PLAYING CARD FOOL..PLAYING CARD TRUMP-21

    val server = serverListener.assertOpen()

    // Initiate a close on the client, which will schedule a hard cancel in 500 ms.
    val closeAtNanos = System.nanoTime()
    webSocket.close(1000, "goodbye", 500L)
    serverListener.assertClosing(1000, "goodbye")

    // Confirm that the hard cancel occurred after 500 ms.
    clientListener.assertFailure()
    val elapsedUntilFailure = System.nanoTime() - closeAtNanos