How to Test Private Methods?
Testing private methods. When and how?
Do not test private methods. If one is complex enough to deserve its own test, extract it into a class and test that behaviour instead.
This is a question that I have encountered with some frequency for a long time. So I thought I would put together my thoughts on the subject here.
Short answer #
Never.
Long answer #
Never ever.
What if…? #
If you really want to test a private method, consider extracting that private method logic into a separate class, and write a unit test for that class’ behavior.
For this one, I was inspired by Fran Iglesias’ original post.