Post-mortem unit testing

Question

I do version control with Git, and unit testing with QUnit. Sometimes I find a bug in my software that was not present in a past version. It\'s easy for me to write a unit test

Answer 1

Yes, this is called git bisect, and was first introduced in git.

Principle:

• grab a commit in the past where you know it worked, let's call it c1;
• grab a commit after c1 you know fails, call it c2;
• git bisect start c2 c1.

You can even restrict the bisect to subpaths if you know where it fails, and if you have a script which can run the test non interactively, use git bisect run.