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use std::{
ops::Deref,
sync::{
atomic::{self, AtomicBool},
Arc,
},
};
use crate::{
owned_slice::{slice_owned, try_slice_owned, OwnedSlice},
OnDrop,
};
#[test]
fn smoke() {
let slice = slice_owned(vec![1, 2, 3, 4, 5, 6], Vec::as_slice);
assert_eq!(&*slice, [1, 2, 3, 4, 5, 6]);
}
#[test]
fn static_storage() {
let slice = slice_owned(Box::new(String::from("what")), |_| b"bytes boo");
assert_eq!(&*slice, b"bytes boo");
}
#[test]
fn slice_the_slice() {
let slice = slice_owned(vec![1, 2, 3, 4, 5, 6], Vec::as_slice);
let slice = slice_owned(slice, |s| &s[1..][..4]);
let slice = slice_owned(slice, |s| s);
let slice = slice_owned(slice, |s| &s[1..]);
assert_eq!(&*slice, &[1, 2, 3, 4, 5, 6][1..][..4][1..]);
}
#[test]
fn try_and_fail() {
let res = try_slice_owned(vec![0], |v| v.get(12..).ok_or(()));
assert!(res.is_err());
}
#[test]
fn boxed() {
// It's important that we don't cause UB because of `Box`'es uniqueness
let boxed: Box<[u8]> = vec![1, 1, 2, 3, 5, 8, 13, 21].into_boxed_slice();
let slice = slice_owned(boxed, Deref::deref);
assert_eq!(&*slice, [1, 1, 2, 3, 5, 8, 13, 21]);
}
#[test]
fn drop_drops() {
let flag = Arc::new(AtomicBool::new(false));
let flag_prime = Arc::clone(&flag);
let d = OnDrop(move || flag_prime.store(true, atomic::Ordering::Relaxed));
let slice = slice_owned(d, |_| &[]);
assert_eq!(flag.load(atomic::Ordering::Relaxed), false);
drop(slice);
assert_eq!(flag.load(atomic::Ordering::Relaxed), true);
}
#[test]
fn send_sync() {
crate::sync::assert_dyn_send::<OwnedSlice>();
crate::sync::assert_dyn_sync::<OwnedSlice>();
}
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