什么测试场景是必要的，足以彻底检测黑板测试定期约会模型？

I have a django model for an appointment in a calendar that I am attempting to write a very comprehensive test driver for. The recurring appointment occurs at some point in time and can either run on infinitely or recur for a fixed number of times. The appointment mirrors the functionality available for a Google Calendar appointment (can recur monthly/annually/weekly, every two weeks, every 3 years.)I have a django model for an appointment in a c