When preparing a module a special care should be taken to explicitly define a public API. It doesn’t mean you have to use the “interface” keyword. It’s enough to ensure that the developers who might be interested in using your module, know which elements are to be used and which are not (i.e. what is an input and what’s an expected output).
The concept was already illustrated above on the image with Sociable Unit Tests. Also the name is likely self-explanatory and there is a good article online about it, so I won’t be too exhaustive here (see: Resources). The crux is that it’s acceptable - if circumstances require it - to add an extra suite of tests for particular classes, methods, or functions. This does not violate the rules of Sociable Unit Tests (it will just supplement them).
，更多细节参见Line官方版本下载
Константин Лысяков (Редактор отдела «Россия»)
为什么党总是能够领导人民取得伟大成就、创造人间奇迹？根本在于掌握了马克思主义科学理论，并不断结合新的实际推进理论创新。
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