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#![warn(rust_2018_idioms)]
#![cfg(feature = "full")]
use tokio::sync::Notify;
use tokio_test::task::spawn;
use tokio_test::*;
trait AssertSend: Send + Sync {}
impl AssertSend for Notify {}
#[test]
fn notify_notified_one() {
let notify = Notify::new();
let mut notified = spawn(async { notify.notified().await });
notify.notify_one();
assert_ready!(notified.poll());
}
#[test]
fn notified_one_notify() {
let notify = Notify::new();
let mut notified = spawn(async { notify.notified().await });
assert_pending!(notified.poll());
notify.notify_one();
assert!(notified.is_woken());
assert_ready!(notified.poll());
}
#[test]
fn notified_multi_notify() {
let notify = Notify::new();
let mut notified1 = spawn(async { notify.notified().await });
let mut notified2 = spawn(async { notify.notified().await });
assert_pending!(notified1.poll());
assert_pending!(notified2.poll());
notify.notify_one();
assert!(notified1.is_woken());
assert!(!notified2.is_woken());
assert_ready!(notified1.poll());
assert_pending!(notified2.poll());
}
#[test]
fn notify_notified_multi() {
let notify = Notify::new();
notify.notify_one();
let mut notified1 = spawn(async { notify.notified().await });
let mut notified2 = spawn(async { notify.notified().await });
assert_ready!(notified1.poll());
assert_pending!(notified2.poll());
notify.notify_one();
assert!(notified2.is_woken());
assert_ready!(notified2.poll());
}
#[test]
fn notified_drop_notified_notify() {
let notify = Notify::new();
let mut notified1 = spawn(async { notify.notified().await });
let mut notified2 = spawn(async { notify.notified().await });
assert_pending!(notified1.poll());
drop(notified1);
assert_pending!(notified2.poll());
notify.notify_one();
assert!(notified2.is_woken());
assert_ready!(notified2.poll());
}
#[test]
fn notified_multi_notify_drop_one() {
let notify = Notify::new();
let mut notified1 = spawn(async { notify.notified().await });
let mut notified2 = spawn(async { notify.notified().await });
assert_pending!(notified1.poll());
assert_pending!(notified2.poll());
notify.notify_one();
assert!(notified1.is_woken());
assert!(!notified2.is_woken());
drop(notified1);
assert!(notified2.is_woken());
assert_ready!(notified2.poll());
}
#[test]
fn notify_in_drop_after_wake() {
use futures::task::ArcWake;
use std::future::Future;
use std::sync::Arc;
let notify = Arc::new(Notify::new());
struct NotifyOnDrop(Arc<Notify>);
impl ArcWake for NotifyOnDrop {
fn wake_by_ref(_arc_self: &Arc<Self>) {}
}
impl Drop for NotifyOnDrop {
fn drop(&mut self) {
self.0.notify_waiters();
}
}
let mut fut = Box::pin(async {
notify.notified().await;
});
{
let waker = futures::task::waker(Arc::new(NotifyOnDrop(notify.clone())));
let mut cx = std::task::Context::from_waker(&waker);
assert!(fut.as_mut().poll(&mut cx).is_pending());
}
// Now, notifying **should not** deadlock
notify.notify_waiters();
}
#[test]
fn notify_one_after_dropped_all() {
let notify = Notify::new();
let mut notified1 = spawn(async { notify.notified().await });
assert_pending!(notified1.poll());
notify.notify_waiters();
notify.notify_one();
drop(notified1);
let mut notified2 = spawn(async { notify.notified().await });
assert_ready!(notified2.poll());
}
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