RapidCheck is a C++ framework for property based testing inspired by QuickCheck
and other similar frameworks. In property based testing, you state facts about
your code that given certain precondition should always be true. RapidCheck
then generates random test data to try and find a case for which the property
doesn't hold. If such a case is found, RapidCheck tries to find the smallest
case (for some definition of smallest) for which the property is still false
and then displays this as a counterexample. For example, if the input is an
integer, RapidCheck tries to find the smallest integer for which the property
is false.