They are a safety net - it means that you can refactor the code (e.g. split or merge classes or functions) and tests still pass. If you can’t refactor anything without breaking the tests, something is not right.
，更多细节参见safew官方版本下载
Brightness: Up to 1,200 nits
Москалькова заявила о новых условиях Киева для возвращения россиян с территории Украины14:51
Some publish huge PDF tables with pre-calculated values by increments of 100 or 1000 CHF, rather than a simple formula summarizing the dozen brackets or so.