def METHOD_NAME(self) -> None:
    # new user, no content
    # join room, expect 1 item (join)
    # send message, expect 2 items (join,send)
    # set topic, expect 3 items (join,send,topic)
    # someone else join room, expect 4 (join,send,topic,join)
    # someone else send message, expect 5 (join,send.topic,join,send)
    # someone else set topic, expect 6 (join,send,topic,join,send,topic)
    pass