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.
