rtools/
misc.rs

1use std::{
2    collections::hash_map::DefaultHasher,
3    hash::{Hash, Hasher},
4    thread,
5    time::Duration,
6};
7
8pub fn hash(obj: impl ToString + Hash) -> u64 {
9    let mut hasher = DefaultHasher::new();
10    obj.hash(&mut hasher);
11    hasher.finish()
12}
13
14pub fn sleep(duration: impl Into<f32>) {
15    let duration = duration.into();
16    assert!(duration >= 0.0);
17
18    if duration == 0.0 {
19        return;
20    }
21
22    #[allow(clippy::cast_possible_truncation)]
23    #[allow(clippy::cast_sign_loss)]
24    thread::sleep(Duration::from_micros((duration * 1_000_000.0) as _));
25}
26
27pub trait Toggle {
28    fn toggle(&mut self) -> bool;
29}
30
31/// Returns old value
32impl Toggle for bool {
33    fn toggle(&mut self) -> bool {
34        *self = !*self;
35        !*self
36    }
37}
38
39#[cfg(test)]
40mod test {
41
42    use crate::{Toggle, hash, passed::Passed, sleep};
43
44    #[test]
45    fn toggle() {
46        let mut val = true;
47
48        for _ in 0..10 {
49            let prev = val;
50            assert_eq!(val.toggle(), prev);
51            assert_eq!(val, !prev);
52        }
53    }
54
55    #[test]
56    fn misc() {
57        assert_eq!(397663693774528972, hash(54325));
58        assert_eq!(13713634450856707654, hash(8657865));
59        assert_eq!(5949921715258702887, hash(87));
60    }
61
62    #[test]
63    fn test_sleep() {
64        let mut pass = Passed::default();
65
66        sleep(0.2);
67        let passed = pass.passed();
68        assert!(passed >= 200);
69        assert!(passed < 220);
70    }
71}
rtools/misc.rs

rtools/
misc.rs
