A migration can address an infrastructure limitation and still create a delivery chal...

In Part 1 we moved security policy into the router. Today we do the same for caching, and we pick up one of the most underused performance wins on the web along the way.

A validation spec usually checks several fields at once: name is set, email looks right, total is positive, status is one of an allowed list. Written as separate it() assertions, TestBox stops at the first failure and you fix it, rerun, and find out about the second failure. Five fields, potentially five rounds of that.