extern crate futures;
use std::sync::mpsc;
use std::thread;
use futures::{Future, Poll};
use futures::future::{lazy, ok};
use futures::sync::oneshot::*;
mod support;
use support::*;
#[test]
fn smoke_poll() {
let (mut tx, rx) = channel::<u32>();
let mut task = futures::executor::spawn(lazy(|| {
assert!(tx.poll_cancel().unwrap().is_not_ready());
assert!(tx.poll_cancel().unwrap().is_not_ready());
drop(rx);
assert!(tx.poll_cancel().unwrap().is_ready());
assert!(tx.poll_cancel().unwrap().is_ready());
ok::<(), ()>(())
}));
assert!(task.poll_future_notify(¬ify_noop(), 0).unwrap().is_ready());
}
#[test]
fn cancel_notifies() {
let (tx, rx) = channel::<u32>();
let (tx2, rx2) = mpsc::channel();
WaitForCancel { tx: tx }.then(move |v| tx2.send(v)).forget();
drop(rx);
rx2.recv().unwrap().unwrap();
}
struct WaitForCancel {
tx: Sender<u32>,
}
impl Future for WaitForCancel {
type Item = ();
type Error = ();
fn poll(&mut self) -> Poll<(), ()> {
self.tx.poll_cancel()
}
}
#[test]
fn cancel_lots() {
let (tx, rx) = mpsc::channel::<(Sender<_>, mpsc::Sender<_>)>();
let t = thread::spawn(move || {
for (tx, tx2) in rx {
WaitForCancel { tx: tx }.then(move |v| tx2.send(v)).forget();
}
});
for _ in 0..20000 {
let (otx, orx) = channel::<u32>();
let (tx2, rx2) = mpsc::channel();
tx.send((otx, tx2)).unwrap();
drop(orx);
rx2.recv().unwrap().unwrap();
}
drop(tx);
t.join().unwrap();
}
#[test]
fn close() {
let (mut tx, mut rx) = channel::<u32>();
rx.close();
assert!(rx.poll().is_err());
assert!(tx.poll_cancel().unwrap().is_ready());
}
#[test]
fn close_wakes() {
let (tx, mut rx) = channel::<u32>();
let (tx2, rx2) = mpsc::channel();
let t = thread::spawn(move || {
rx.close();
rx2.recv().unwrap();
});
WaitForCancel { tx: tx }.wait().unwrap();
tx2.send(()).unwrap();
t.join().unwrap();
}