1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
#![cfg(feature = "proptest")]
#![cfg_attr(has_doc_cfg, doc(cfg(feature = "proptest")))]
use crate::{nlimbs, Uint};
use proptest::{
arbitrary::Arbitrary,
collection::{vec, VecStrategy},
num::u64::Any,
strategy::{BoxedStrategy, Strategy},
};
impl<const BITS: usize, const LIMBS: usize> Arbitrary for Uint<BITS, LIMBS> {
type Parameters = ();
type Strategy = BoxedStrategy<Self>;
fn arbitrary_with(_: Self::Parameters) -> BoxedStrategy<Self> {
let limbs: VecStrategy<Any> = vec(u64::arbitrary(), nlimbs(BITS));
limbs
.prop_map(|mut limbs| {
if Self::LIMBS > 0 {
limbs[Self::LIMBS - 1] &= Self::MASK;
}
Self::from_limbs_slice(&limbs)
})
.boxed()
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::const_for;
use proptest::proptest;
#[test]
fn test_arbitrary() {
const_for!(BITS in SIZES {
const LIMBS: usize = nlimbs(BITS);
proptest!(|(n: Uint::<BITS, LIMBS>)| {
let _ = n;
});
});
}
}