> Do they not test against the real thing and assume their test cases hit every corner case? That's not developers responsibility, we can write tests only for

> Do they not test against the real thing and assume their test cases hit every corner case? That's not developers responsibility, we can write tests only for our known knowns and known unknowns. This thread was more around the author who doesn't seem to understand that taking the full source(at least once) is a vital part.