:white_check_mark: add unit test
:white_check_mark: add unit test

meifamily/ptt-alertor,liam-lai/ptt-alertor,liam-lai/ptt-alertor,meifamily/ptt-alertor,liam-lai/ptt-alertor,meifamily/ptt-alertor,liam-lai/ptt-alertor,meifamily/ptt-alertor