Interesting article, but the answer I'd be looking for is #itdepends. What's the impact of a bug in this code base? How likely is there to be a bug? How quickl

Interesting article, but the answer I'd be looking for is #itdepends. What's the impact of a bug in this code base? How likely is there to be a bug? How quickly can you rectify a bug if it happens? Most of my Makefiles and setup.py files have 0% test coverage. Libraries that are automatically deployed to a few projects, where I can't easily ship a fix and I don't really fully understand the impact - I'd aim for 100%, but not arbitrarily; I want to make sure we've actually tested the edge cases.