Clean Coder

Do you write unit tests?

Yes, of course!

Do you write them first?

Yes, I follow the three laws of TDD.

What is the difference in module structure between your tests and your code?

I create one test class per production class.

So if you have a production class named User you will have a test class named UserTest?

Yes, almost always.

So the structure of your tests, and the structure of your code are covariant.

Um. I suppose so, yes.

And so you are coupling the structure of your tests to the structure of your production code.

I hadn’t thought about it being a coupling before; but, yes, I suppose I am.

So when you refactor the class structure of your production code, without changing any behavior; do your tests all break?

Well, yes. Of course.

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