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use crate::{std::convert::TryInto, Builder, Uuid};
use arbitrary::{Arbitrary, Unstructured};
impl Arbitrary<'_> for Uuid {
fn arbitrary(u: &mut Unstructured<'_>) -> arbitrary::Result<Self> {
let b = u
.bytes(16)?
.try_into()
.map_err(|_| arbitrary::Error::NotEnoughData)?;
Ok(Builder::from_random_bytes(b).into_uuid())
}
fn size_hint(depth: usize) -> (usize, Option<usize>) {
(16, Some(16))
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{Variant, Version};
#[test]
fn test_arbitrary() {
let mut bytes = Unstructured::new(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);
let uuid = Uuid::arbitrary(&mut bytes).unwrap();
assert_eq!(Some(Version::Random), uuid.get_version());
assert_eq!(Variant::RFC4122, uuid.get_variant());
}
#[test]
fn test_arbitrary_empty() {
let mut bytes = Unstructured::new(&[]);
// Ensure we don't panic when building an arbitrary `Uuid`
let uuid = Uuid::arbitrary(&mut bytes);
assert!(uuid.is_err());
}
}