The theory here is good, but I think the implementation is lacking. Haskell's QuickCheck is one of the most mature frameworks for doing what the author calls "d

The theory here is good, but I think the implementation is lacking. Haskell's QuickCheck is one of the most mature frameworks for doing what the author calls "data-driven testing", so It might be worth mentioning one of the JavaScript ports compatible with Mocha: node-quickcheck, JSCheck, etc.