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use std::future::Future;
use std::pin::Pin;
use std::sync::{Arc, Mutex};
use std::task::Context;
use event_listener::{Event, EventListener};
use waker_fn::waker_fn;
#[cfg(target_family = "wasm")]
use wasm_bindgen_test::wasm_bindgen_test as test;
fn is_notified(listener: &mut EventListener) -> bool {
let waker = waker_fn(|| ());
Pin::new(listener)
.poll(&mut Context::from_waker(&waker))
.is_ready()
}
#[test]
fn notify() {
let event = Event::new();
let mut l1 = event.listen();
let mut l2 = event.listen();
let mut l3 = event.listen();
assert!(!is_notified(&mut l1));
assert!(!is_notified(&mut l2));
assert!(!is_notified(&mut l3));
assert_eq!(event.notify(2), 2);
assert_eq!(event.notify(1), 0);
assert!(is_notified(&mut l1));
assert!(is_notified(&mut l2));
assert!(!is_notified(&mut l3));
}
#[test]
fn notify_additional() {
let event = Event::new();
let mut l1 = event.listen();
let mut l2 = event.listen();
let mut l3 = event.listen();
assert_eq!(event.notify_additional(1), 1);
assert_eq!(event.notify(1), 0);
assert_eq!(event.notify_additional(1), 1);
assert!(is_notified(&mut l1));
assert!(is_notified(&mut l2));
assert!(!is_notified(&mut l3));
}
#[test]
fn notify_one() {
let event = Event::new();
let mut l1 = event.listen();
let mut l2 = event.listen();
assert!(!is_notified(&mut l1));
assert!(!is_notified(&mut l2));
assert_eq!(event.notify(1), 1);
assert!(is_notified(&mut l1));
assert!(!is_notified(&mut l2));
assert_eq!(event.notify(1), 1);
assert!(is_notified(&mut l2));
}
#[test]
fn notify_all() {
let event = Event::new();
let mut l1 = event.listen();
let mut l2 = event.listen();
assert!(!is_notified(&mut l1));
assert!(!is_notified(&mut l2));
assert_eq!(event.notify(usize::MAX), 2);
assert!(is_notified(&mut l1));
assert!(is_notified(&mut l2));
}
#[test]
fn drop_notified() {
let event = Event::new();
let l1 = event.listen();
let mut l2 = event.listen();
let mut l3 = event.listen();
assert_eq!(event.notify(1), 1);
drop(l1);
assert!(is_notified(&mut l2));
assert!(!is_notified(&mut l3));
}
#[test]
fn drop_notified2() {
let event = Event::new();
let l1 = event.listen();
let mut l2 = event.listen();
let mut l3 = event.listen();
assert_eq!(event.notify(2), 2);
drop(l1);
assert!(is_notified(&mut l2));
assert!(!is_notified(&mut l3));
}
#[test]
fn drop_notified_additional() {
let event = Event::new();
let l1 = event.listen();
let mut l2 = event.listen();
let mut l3 = event.listen();
let mut l4 = event.listen();
assert_eq!(event.notify_additional(1), 1);
assert_eq!(event.notify(2), 1);
drop(l1);
assert!(is_notified(&mut l2));
assert!(is_notified(&mut l3));
assert!(!is_notified(&mut l4));
}
#[test]
fn drop_non_notified() {
let event = Event::new();
let mut l1 = event.listen();
let mut l2 = event.listen();
let l3 = event.listen();
assert_eq!(event.notify(1), 1);
drop(l3);
assert!(is_notified(&mut l1));
assert!(!is_notified(&mut l2));
}
#[test]
fn notify_all_fair() {
let event = Event::new();
let v = Arc::new(Mutex::new(vec![]));
let mut l1 = event.listen();
let mut l2 = event.listen();
let mut l3 = event.listen();
let waker1 = {
let v = v.clone();
waker_fn(move || v.lock().unwrap().push(1))
};
let waker2 = {
let v = v.clone();
waker_fn(move || v.lock().unwrap().push(2))
};
let waker3 = {
let v = v.clone();
waker_fn(move || v.lock().unwrap().push(3))
};
assert!(Pin::new(&mut l1)
.poll(&mut Context::from_waker(&waker1))
.is_pending());
assert!(Pin::new(&mut l2)
.poll(&mut Context::from_waker(&waker2))
.is_pending());
assert!(Pin::new(&mut l3)
.poll(&mut Context::from_waker(&waker3))
.is_pending());
assert_eq!(event.notify(usize::MAX), 3);
assert_eq!(&*v.lock().unwrap(), &[1, 2, 3]);
assert!(Pin::new(&mut l1)
.poll(&mut Context::from_waker(&waker1))
.is_ready());
assert!(Pin::new(&mut l2)
.poll(&mut Context::from_waker(&waker2))
.is_ready());
assert!(Pin::new(&mut l3)
.poll(&mut Context::from_waker(&waker3))
.is_ready());
}
|
