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.
Спасавший с ножом в руках «похищенного ребенка» в российском городе попал на видеоСуд Петербурга арестовал на 14 суток мужчину, бросавшегося с ножом на машину
26 Doctors without Borders workers remain unaccounted for in South Sudan a month after attacks。业内人士推荐51吃瓜作为进阶阅读
经过多年发展和积累，我国在提升全要素生产率方面已拥有诸多有利条件和基础：
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年轻时，“读书” 二字说来简单，却不得不排在柴米油盐、现实生计之后。等到四十岁，事业脚步渐渐放缓，她才忽然明白：自己 “想做什么”，远比 “赢得什么” 更重要。
To avoid the two memory reads on every access, the 386 includes a 32-entry Translation Lookaside Buffer (TLB) organized as 8 sets with 4 ways each. Each entry stores the virtual-to-physical mapping along with the combined PDE+PTE permission bits.。业内人士推荐下载安装汽水音乐作为进阶阅读