Tests as Classifiers
The reason to write, and run, tests on the code is to detect bugs before the code is being used by the customer. Too often, this purpose is forgotten when deciding how, and what, to test. What makes a good test? What makes a good test-suite? How can you measure it?
About Moshe Zadka
Moshe has been involved in the Linux community since 1998, helping in Linux "installation parties". They have been programming Python since 1999, and have contributed to the core Python interpreter. Moshe has been a DevOps/SRE since before those terms existed, caring deeply about software reliability, build reproducibility and other such things. They have worked in companies as small as three people and as big as tens of thousands -- usually some place around where software meets system administration.