Edge cases and special values for QuickCheck Arbitrary instances https://github.com/minad/quickcheck-special#readme

Latest on Hackage:

See all snapshots quickcheck-special appears in

MIT licensed and maintained by Daniel Mendler

Module documentation for

This version can be pinned in stack with:quickcheck-special-,1448

The standard Arbitrary instances of QuickCheck don't generate special values. This is fixed by this package which provides the newtype Special with an Arbitrary instance. The special values are given by the SpecialValues typeclass.