Our project contains 2600 class files and we have decided to start using automated tests.
We know we have should have started this 2599 class files ago, but how and where should large projects start to write tests?
Pick a random class and just go?
What’s important to know? Are there any good tools to use?
Write a unit test before you change something, and for every bug you encounter.
In other words, test the functionality you are currently working on. Otherwise, it is going to take a lot of time and effort to write tests for all classes.