[luhn]

> ...deliver abstract concepts that only really make sense to people who have already grasped/discovered those concepts...TDD is a great example of this

Thank you! I'm glad I'm not the only one who thinks this. There's an abundance of articles explaining how to "best" test, usually using an overly simplified example (I'm looking at you, `add(a, b)`). When you try to apply it in the real world, things break down because no one explains how to deal with the icky practical issues.

Despite all these resources online teaching you how to test, I feel that how to test well in real-world scenarios remains tribal knowledge.