assertThat(data.readByteString().hex(), "Data not empty")
        .isEqualTo("")
    }

  // Mutually exclusive. Use the one corresponding to the peer whose behavior you wish to test.
  private val serverWriter =
    WebSocketWriter(
      isClient = false,
      sink = data,
      random = random,
      perMessageDeflate = false,
      noContextTakeover = false,