It reads like the author has never written a test in their life. Yeah, HTTP (one of the examples) doesn’t rely in types, it relies in rolling your own input val

It reads like the author has never written a test in their life. Yeah, HTTP (one of the examples) doesn’t rely in types, it relies in rolling your own input validation… Type checking is simply built in testing for a subset of problems. At scale, the only thing you gain from dynamic typing is the need to write even more tests than usual.