QuickCheck is a library for random testing of program properties. The
programmer provides a specification of the program, in the form of
properties which functions should satisfy, and QuickCheck then tests that
the properties hold in a large number of randomly generated cases.
Specifications are expressed in Haskell, using combinators provided by
QuickCheck. QuickCheck provides combinators to define properties, observe
the distribution of test data, and define test data generators.

Most of QuickCheck's functionality is exported by the main
"Test.QuickCheck" module. The main exception is the monadic property
testing library in "Test.QuickCheck.Monadic".

If you are new to QuickCheck, you can try looking at the following
resources:

* The <http://www.cse.chalmers.se/~rjmh/QuickCheck/man… official
QuickCheck manual>. It's a bit out-of-date in some details and doesn't
cover newer QuickCheck features, but is still full of good advice. *
<https://begriffs.com/posts/2017-01-14-design-use…;, a
detailed tutorial written by a user of QuickCheck.

The <https://hackage.haskell.org/package/quickcheck-i…
quickcheck-instances> companion package provides instances for types in
Haskell Platform packages at the cost of additional dependencies.

• Anton Zhukharev
• Denis Smirnov

• ghc8.6.4-quickcheck