[worik]

> To document + enforce the intended functionality, use tests.

Tests go out of date

Tests increase the maintainince burden

The compiler does not ensure code is tested

Tests get duplicated

Mēh! Tests matter, and testing is very important. Good judgment is required

Just like comments.

Writing code requires professional care at every step. The compiler helps of course see, but being professional is more than writing code that compiles

It involves documents too. And tests. Not too many (tests or documents) but not too few

Undocumented code is an enormous burden to maintain (I am eyebrows deep in such a project now). It is not enough to just write code and tests, documents including inline comments, are crucial