crimsonalucard's reply is a good summary, but it must be understood that this kind of thing obviates the need for some unit tests, not all unit tests. Haskelle

crimsonalucard's reply is a good summary, but it must be understood that this kind of thing obviates the need for some unit tests, not all unit tests. Haskellers love unit testing, after all! (See QuickCheck and HedgehogQA).