I’ve seen codebases that had old testValid2 style of test as well as fully fleshed out conversionReturnsNullOnEmptyString style. Working there made me apreciate proper naming. I know different test frameworks in different languages let you name the test separately, but it’s a bit of an effort duplication.

Anything that does under-the-cover low level magic is bad. The deeper the magic, the worse. Spring is the particular offender here with the lengths it goes so to make you not use new and never be able to debug why something happens. Or worse, why something doesn’t happen. We know how to deal with code, but not magic.