https://rein.kr/posts/2009-03-10-boostprogram_options%EB%A5%BC-%EC%82%AC%EC%9A%A9%ED%95%9C-unittest-%EC%BB%A4%EB%A7%A8%EB%93%9C%EB%9D%BC%EC%9D%B8-%EC%9D%B8%ED%84%B0%ED%8E%98%EC%9D%B4%EC%8A%A4/