Trait quickcheck::Arbitrary
source · pub trait Arbitrary: Clone + Send + 'static {
fn arbitrary<G: Gen>(g: &mut G) -> Self;
fn shrink(&self) -> Box<dyn Iterator<Item = Self>> { ... }
}Expand description
Arbitrary describes types whose values can be randomly generated and
shrunk.
Aside from shrinking, Arbitrary is different from the std::Rand trait
in that it uses a Gen to control the distribution of random values.
As of now, all types that implement Arbitrary must also implement
Clone. (I’m not sure if this is a permanent restriction.)
They must also be sendable and static since every test is run in its own
thread using thread::Builder::spawn, which requires the Send + 'static
bounds.