Comment by hbrn

> Not everyone is as diligent and not everyone will have thought through/remembered all those edge cases when they happen to end up maintaining/adding to your code.

Edge cases could be due to accidental complexity. In this case, the solution is to remove accidental complexity, not to freeze it forever in tests.

Edge cases could be due to essential complexity. In this case, if people are making changes without remembering them, it means they are changing code they don't understand. Sure, tests are making it easier. I don't want it to be easier.

> tests are a great way to ensure all that hard work you did thinking about those edge cases isn’t wasted

It is also a great way to ensure that your best talent is wasted on building guard rails.

Think about it: your best engineers are spending time making worst engineers more productive. And they are not even doing it through mentoring, so your worst engineers will remain where they are.