third_party/rust/tokio-stream/tests/time_throttle.rs


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#![warn(rust_2018_idioms)]
#![cfg(all(feature = "time", feature = "sync", feature = "io-util"))]

use tokio::time;
use tokio_stream::StreamExt;
use tokio_test::*;

use std::time::Duration;

#[tokio::test]
async fn usage() {
    time::pause();

    let mut stream = task::spawn(futures::stream::repeat(()).throttle(Duration::from_millis(100)));

    assert_ready!(stream.poll_next());
    assert_pending!(stream.poll_next());

    time::advance(Duration::from_millis(90)).await;

    assert_pending!(stream.poll_next());

    time::advance(Duration::from_millis(101)).await;

    assert!(stream.is_woken());

    assert_ready!(stream.poll_next());
}