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sync: forward port 0.2 mpsc test #3225

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Merged
merged 1 commit into from
Dec 7, 2020
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sync: forward port 0.2 mpsc test #3225

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19 changes: 19 additions & 0 deletions tokio/tests/sync_mpsc.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -483,3 +483,22 @@ async fn ready_close_cancel_bounded() {
let val = assert_ready!(recv.poll());
assert!(val.is_none());
}

#[tokio::test]
async fn permit_available_not_acquired_close() {
let (tx1, mut rx) = mpsc::channel::<()>(1);
let tx2 = tx1.clone();

let permit1 = assert_ok!(tx1.reserve().await);

let mut permit2 = task::spawn(tx2.reserve());
assert_pending!(permit2.poll());

rx.close();

drop(permit1);
assert!(permit2.is_woken());

drop(permit2);
assert!(rx.recv().await.is_none());
}