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sync: fix sync::broadcast::Sender<T>::closed() doctest (#7090)

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The test's previous iteration could sometimes flake since we didn't
await the completion of the first task. Since the tasks only existed to
`move` the relevant `rx`'s in, to force a drop, we can omit them
entirely and drop the `rx`s via `drop()`. This prevents any
scheduling-related flakes.
This commit is contained in:
Evan Rittenhouse 2025-01-12 03:33:07 -08:00 committed by GitHub
parent dabae570b1
commit 435e39001b
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1 changed files with 5 additions and 8 deletions
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13
tokio/src/sync/broadcast.rs
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@ -825,17 +825,14 @@ impl<T> Sender<T> {
/// let (tx, mut rx1) = broadcast::channel::<u32>(16);
/// let mut rx2 = tx.subscribe();
///
/// tokio::spawn(async move {
/// assert_eq!(rx1.recv().await.unwrap(), 10);
/// });
///
/// let _ = tx.send(10);
///
/// assert_eq!(rx1.recv().await.unwrap(), 10);
/// drop(rx1);
/// assert!(tx.closed().now_or_never().is_none());
///
/// let _ = tokio::spawn(async move {
/// assert_eq!(rx2.recv().await.unwrap(), 10);
/// }).await;
///
/// assert_eq!(rx2.recv().await.unwrap(), 10);
/// drop(rx2);
/// assert!(tx.closed().now_or_never().is_some());
/// }
/// ```