org.scalacheck.effect

An effectful property.

Effectful properties are ones in which each sample evaluates in a type constructor. That is, instead of directly computing a result from a single sample of generated values, the result is computed in some effect F[_] -- e.g., cats.effect.IO or scala.concurrent.Future. A property which computes in an effect F[_] has the type PropF[F].

PropF[F] instances can be constructed for any effect which has a MonadError[F, Throwable] instance.

The most common way to construct PropF[F] values is by using one of the forAllF methods on the PropF companion. These are analogous to Prop.forAll from ScalaCheck. When computing the result of a single sample, F[Unit] values are treated as successes and any exceptions thrown are treated as falsifications.