[yaktubi]

On that note it is a great tool during development to get a piece working without connecting it to the broader application. Test driven development gives a nice debugging context that is easier to work with. The code coverage and regression part comes as a nice bonus feature.

I’d also like to add that if you contribute code to an open source project it is extremely beneficial to have iron-clad unit tests. Since there is so many devs it would be easy for someone to accidentally break something you fixed already.