derive-quickcheck-arbitrary

Derive macro for quickcheck::Arbitrary.

Expands to calling Arbitrary::arbitrary on every field of a struct.

use derive_quickcheck_arbitrary::Arbitrary;

#[derive(Clone, Arbitrary)]
struct Yakshaver {
    id: usize,
    name: String,
}

You can customise field generation by either:

• providing a callable that accepts &mut quickcheck::Gen.
• always using the default value

#[derive(Clone, Arbitrary)]
struct Yakshaver {
    /// Must be less than 10_000
    #[arbitrary(gen(|g| num::clamp(usize::arbitrary(g), 0, 10_000) ))]
    id: usize,
    name: String,
    #[arbitrary(default)]
    always_false: bool,
}

You can skip enum variants:

#[derive(Clone, Arbitrary)]
enum YakType {
    Domestic {
        name: String,
    },
    Wild,
    #[arbitrary(skip)]
    Alien,
}

You can add bounds for generic structs:

#[derive(Clone, Arbitrary)]
#[arbitrary(where(T: Arbitrary))]
struct GenericYak<T> {
    name: T,
}