async-timer 0.7.4

Timers for Rust async story
Documentation 
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use async_timer::{Interval};

use std::time;

#[tokio::test]
async fn test_interval() {
    let mut interval = Interval::platform_new(time::Duration::from_secs(1));

    let before = time::SystemTime::now();
    interval.as_mut().await;
    let after = time::SystemTime::now();
    let diff = after.duration_since(before).unwrap();

    assert!(diff.as_millis() >= 750 && diff.as_millis() <= 1_250);

    let before = time::SystemTime::now();
    interval.as_mut().await;
    let after = time::SystemTime::now();
    let diff = after.duration_since(before).unwrap();

    assert!(diff.as_millis() >= 750 && diff.as_millis() <= 1_250);
}

#[cfg(feature = "stream")]
#[tokio::test]
async fn test_stream_interval() {
    use futures_util::stream::StreamExt;

    let mut interval = Interval::platform_new(time::Duration::from_secs(1));

    let before = time::SystemTime::now();
    interval.next().await;
    let after = time::SystemTime::now();
    let diff = after.duration_since(before).unwrap();

    assert!(diff.as_millis() >= 750 && diff.as_millis() <= 1_250);

    let before = time::SystemTime::now();
    interval.next().await;
    let after = time::SystemTime::now();
    let diff = after.duration_since(before).unwrap();

    assert!(diff.as_millis() >= 750 && diff.as_millis() <= 1_250);
}