Exactly. The author's tests are overly complex. Instead of gleaning the actual value of this insight, which is that you're not cleanly separating your inputs a

Exactly. The author's tests are overly complex. Instead of gleaning the actual value of this insight, which is that you're not cleanly separating your inputs and your outputs, the author concludes that unit tests are a waste of time. Nope. Unit tests are a tool, but writing proper unit tests and understanding the value they give you is an art and a science. It requires experience and deliberate design.