checkito 5.0.0

A safe, efficient and simple QuickCheck-inspired library to generate shrinkable random data mainly oriented towards generative/property/exploratory testing.
Documentation 
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use crate::{generate::Generate, shrink::Shrink, state::State};

#[derive(Debug, Clone)]
pub struct Map<T: ?Sized, F>(pub(crate) F, pub(crate) T);

impl<G: Generate + ?Sized, T, F: Fn(G::Item) -> T + Clone> Generate for Map<G, F> {
    type Item = T;
    type Shrink = Map<G::Shrink, F>;

    const CARDINALITY: Option<u128> = G::CARDINALITY;

    fn generate(&self, state: &mut State) -> Self::Shrink {
        Map(self.0.clone(), self.1.generate(state))
    }

    fn cardinality(&self) -> Option<u128> {
        self.1.cardinality()
    }
}

impl<S: Shrink, T, F: Fn(S::Item) -> T + Clone> Shrink for Map<S, F> {
    type Item = T;

    fn item(&self) -> Self::Item {
        self.0(self.1.item())
    }

    fn shrink(&mut self) -> Option<Self> {
        Some(Self(self.0.clone(), self.1.shrink()?))
    }
}