Add tests for shrinkTestCase
Add tests for shrinkTestCase

tm604/rapidcheck,whoshuu/rapidcheck,whoshuu/rapidcheck,unapiedra/rapidfuzz,tm604/rapidcheck,tm604/rapidcheck,emil-e/rapidcheck,emil-e/rapidcheck,whoshuu/rapidcheck,emil-e/rapidcheck,unapiedra/rapidfuzz,unapiedra/rapidfuzz