Can't speak for NAP but Photobox was extremely strong on unit + integration testing. IIRC, a full ground-up test suite run took a few hours because it started

Can't speak for NAP but Photobox was extremely strong on unit + integration testing. IIRC, a full ground-up test suite run took a few hours because it started from a bare box, installed + tested Perl + every needed module, span up a blank database, then did the unit tests, then ran a full integration test suite against that server. That was only done for a release; for general commits, it was ok to run a subset of tests to show things worked / still worked.