proptest-arbitrary 0.2.0

use super::*;
use std::thread::*;
use std::time::Duration;

impl_arbitrary!(Builder, SMapped<'a, (Option<usize>, Option<String>), Self>, {
    let prob = Probability::from(0.7);
    let sarg = product_pack![prob, ()];
    let narg = product_pack![prob, Default::default()];
    let args = product_pack![sarg, narg];
    any_with_smap(args, |(os, on)| {
        let mut b = Builder::new();
        b = if let Some(size) = os { b.stack_size(size) } else { b };
        if let Some(name) = on { b.name(name) } else { b }
    })
});

/*
 * The usefulness of this impl is debatable - as are its semantics.
 * Perhaps a CoArbitrary-based solution is preferable.
 */
arbitrary_for!([A: 'static + Send + Arbitrary<'a>] JoinHandle<A>,
    SMapped<'a, (A, Option<()>, u8), Self>, A::Parameters,
    args => {
        let prob  = Probability::from(0.1);
        let oargs = product_pack![prob, ()];
        let args2 = product_pack![args, oargs, ()];
        any_with_smap(args2, |(val, panic, sleep)| thread::spawn(move || {
            // Sleep a random amount:
            thread::sleep(Duration::from_millis(sleep as u64));
            // Randomly panic:
            if panic.is_some() {
                panic!("Arbitrary for JoinHandle randomly paniced!");
            }
            // Move value into thread and then just return it:
            val
        }))
    }
);

#[cfg(feature = "nightly")]
impl_arbitrary!(LocalKeyState,
    TupleUnion<(W<Just<Self>>, W<Just<Self>>, W<Just<Self>>)>,
    prop_oneof![
        Just(LocalKeyState::Uninitialized),
        Just(LocalKeyState::Valid),
        Just(LocalKeyState::Destroyed)
    ]
);