P-Y on Nostr: Two reasons tests help with reducing the cost of making changes: First, the obvious ...

Two reasons tests help with reducing the cost of making changes:

First, the obvious one: automated tests catch bugs before they impact our customers. The earlier a bug is caught, the cheaper it is to fix.

Just think about how much time it takes you to fix a bug when junit tells you right there that you messed up, vs when a customer calls with a vague description "it doesn't work".