I don't test private methods and I like to use them a lot. When refactoring, if a private method is unused, both IDE's and linters will warn you, easing the pro

I don't test private methods and I like to use them a lot. When refactoring, if a private method is unused, both IDE's and linters will warn you, easing the process of deleting dead code. If you extract private methods into separated classes and expose them as public methods, deleting unused code becomes hard (and harder with multiple repositories).