understood. theres def an art to judging when its too early to write tests vs the perfect time. its easy for anyone to recognize once its become "too late" and therefore more painful and costly to add it than otherwise would have been

I therefore try to put each situation quickly into 1 of 3 buckets then move forward on that basis:

1. heck no

2. heck yes

3. either way. a gray area

I generally see a case 1 and 2 with confidence. therefore by a process of elimination, that also lets me deduce when its case 3. and in those cases you cant go wrong. :)

"Impossible to predict, the future is." - Yoda