async-timer 0.2.7

Timers for Rust async story
Documentation 
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

use async_timer::oneshot::{Oneshot, Timer};
use futures::executor::block_on;

use std::time;

#[test]
fn test_oneshot() {
    let work = Timer::new(time::Duration::from_secs(2));
    assert!(!work.is_expired());

    let before = time::SystemTime::now();
    block_on(work);
    let after = time::SystemTime::now();
    let diff = after.duration_since(before).unwrap();

    assert!(diff.as_millis() >= 1_500 && diff.as_millis() <= 2_500);

}

#[test]
fn test_tons_oneshot() {
    const NUM: usize = 1024;
    let mut jobs = Vec::with_capacity(NUM);

    for _ in 0..NUM {
        jobs.push(Timer::new(time::Duration::from_secs(2)));
    }

    let before = time::SystemTime::now();
    block_on(futures::future::join_all(jobs));
    let after = time::SystemTime::now();
    let diff = after.duration_since(before).unwrap();

    assert!(diff.as_millis() >= 1_500 && diff.as_millis() <= 2_500);
}

#[test]
fn test_smol_oneshot() {
    let work = Timer::new(time::Duration::from_millis(500));
    assert!(!work.is_expired());

    let before = time::SystemTime::now();
    block_on(work);
    let after = time::SystemTime::now();
    let diff = after.duration_since(before).unwrap();

    assert!(diff.as_millis() >= 250 && diff.as_millis() <= 750);
}