Static classes (methods) do not necessarily have to be avoided as long as they have no hidden dependencies. Of course you can pass dependencies into a static method - it just should not be stored internally and modify the behaviour of later calls.
There should be no problem to test them in this case, too.

但我对你提到的案件也感到不好。 我知道其中一些静态“wrapper”用途类别,在大多数情况下,它们真心想:

EDIT:
Maybe I should clarify. I would use static classes/methods only for very small distinguished tasks. When static classes start to initialize dependencies they certainly should be avoided. If you can t test these static classes they already have a too big job to do.

在。