Automatic testing of Haskell programs.
Haskell Shell
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This is QuickCheck 2, a library for random testing of program properties.

Install it in the usual way:

$ cabal install

There is a Google group for user discussion and questions at!forum/haskell-quickcheck.

The quickcheck-instances [1] companion package provides instances for types in
Haskell Platform packages at the cost of additional dependencies.