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#[cfg(not(miri))]
use std::mem;
use std::panic::catch_unwind;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Mutex;
use std::task::{Poll, Waker};
use async_executor::{Executor, Task};
use futures_lite::future;
use once_cell::sync::Lazy;
#[test]
fn executor_cancels_everything() {
static DROP: AtomicUsize = AtomicUsize::new(0);
static WAKER: Lazy<Mutex<Option<Waker>>> = Lazy::new(Default::default);
let ex = Executor::new();
let task = ex.spawn(async {
let _guard = CallOnDrop(|| {
DROP.fetch_add(1, Ordering::SeqCst);
});
future::poll_fn(|cx| {
*WAKER.lock().unwrap() = Some(cx.waker().clone());
Poll::Pending::<()>
})
.await;
});
future::block_on(ex.tick());
assert!(WAKER.lock().unwrap().is_some());
assert_eq!(DROP.load(Ordering::SeqCst), 0);
drop(ex);
assert_eq!(DROP.load(Ordering::SeqCst), 1);
assert!(catch_unwind(|| future::block_on(task)).is_err());
assert_eq!(DROP.load(Ordering::SeqCst), 1);
}
#[cfg(not(miri))]
#[test]
fn leaked_executor_leaks_everything() {
static DROP: AtomicUsize = AtomicUsize::new(0);
static WAKER: Lazy<Mutex<Option<Waker>>> = Lazy::new(Default::default);
let ex = Executor::new();
let task = ex.spawn(async {
let _guard = CallOnDrop(|| {
DROP.fetch_add(1, Ordering::SeqCst);
});
future::poll_fn(|cx| {
*WAKER.lock().unwrap() = Some(cx.waker().clone());
Poll::Pending::<()>
})
.await;
});
future::block_on(ex.tick());
assert!(WAKER.lock().unwrap().is_some());
assert_eq!(DROP.load(Ordering::SeqCst), 0);
mem::forget(ex);
assert_eq!(DROP.load(Ordering::SeqCst), 0);
assert!(future::block_on(future::poll_once(task)).is_none());
assert_eq!(DROP.load(Ordering::SeqCst), 0);
}
#[test]
fn await_task_after_dropping_executor() {
let s: String = "hello".into();
let ex = Executor::new();
let task: Task<&str> = ex.spawn(async { &*s });
assert!(ex.try_tick());
drop(ex);
assert_eq!(future::block_on(task), "hello");
drop(s);
}
#[test]
fn drop_executor_and_then_drop_finished_task() {
static DROP: AtomicUsize = AtomicUsize::new(0);
let ex = Executor::new();
let task = ex.spawn(async {
CallOnDrop(|| {
DROP.fetch_add(1, Ordering::SeqCst);
})
});
assert!(ex.try_tick());
assert_eq!(DROP.load(Ordering::SeqCst), 0);
drop(ex);
assert_eq!(DROP.load(Ordering::SeqCst), 0);
drop(task);
assert_eq!(DROP.load(Ordering::SeqCst), 1);
}
#[test]
fn drop_finished_task_and_then_drop_executor() {
static DROP: AtomicUsize = AtomicUsize::new(0);
let ex = Executor::new();
let task = ex.spawn(async {
CallOnDrop(|| {
DROP.fetch_add(1, Ordering::SeqCst);
})
});
assert!(ex.try_tick());
assert_eq!(DROP.load(Ordering::SeqCst), 0);
drop(task);
assert_eq!(DROP.load(Ordering::SeqCst), 1);
drop(ex);
assert_eq!(DROP.load(Ordering::SeqCst), 1);
}
#[test]
fn iterator_panics_mid_run() {
let ex = Executor::new();
let panic = std::panic::catch_unwind(|| {
let mut handles = vec![];
ex.spawn_many(
(0..50).map(|i| if i == 25 { panic!() } else { future::ready(i) }),
&mut handles,
)
});
assert!(panic.is_err());
let task = ex.spawn(future::ready(0));
assert_eq!(future::block_on(ex.run(task)), 0);
}
struct CallOnDrop<F: Fn()>(F);
impl<F: Fn()> Drop for CallOnDrop<F> {
fn drop(&mut self) {
(self.0)();
}
}
|
