assertData("8a0548656c6c6f")
  }

  @Test fun clientPongWithPayload() {
    clientWriter.writePong("Hello".encodeUtf8())
    assertData("8a8560b420bb28d14cd70f")
  }

  @Test fun pingTooLongThrows() {
    assertFailsWith<IllegalArgumentException> {
      serverWriter.writePing(binaryData(1000))
    }.also { expected ->
      assertThat(expected.message).isEqualTo(