what's the least resistance path to debugging mocha tests?

Question

Edit Nov 2016: Node now has a built in debugger that you can start with --inspect. This answer explains it: https://stackoverflow.com/a/39901169/30946.

Answer 1

The alternative way using WebStorm node debugger.

In short:

1. You need WebStorm
2. Create new Node debug profile in WebStorm
3. Set path to your mocha binary into Path to Node App JS File
4. Add breakpoints and start the session from WebStorm

Detailed instruction with screenshots by Glenn Block.