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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/rust/tokio-util/tests/poll_semaphore.rs
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/tokio-util/tests/poll_semaphore.rs')
-rw-r--r--third_party/rust/tokio-util/tests/poll_semaphore.rs36
1 files changed, 36 insertions, 0 deletions
diff --git a/third_party/rust/tokio-util/tests/poll_semaphore.rs b/third_party/rust/tokio-util/tests/poll_semaphore.rs
new file mode 100644
index 0000000000..50f36dd803
--- /dev/null
+++ b/third_party/rust/tokio-util/tests/poll_semaphore.rs
@@ -0,0 +1,36 @@
+use std::future::Future;
+use std::sync::Arc;
+use std::task::Poll;
+use tokio::sync::{OwnedSemaphorePermit, Semaphore};
+use tokio_util::sync::PollSemaphore;
+
+type SemRet = Option<OwnedSemaphorePermit>;
+
+fn semaphore_poll(
+ sem: &mut PollSemaphore,
+) -> tokio_test::task::Spawn<impl Future<Output = SemRet> + '_> {
+ let fut = futures::future::poll_fn(move |cx| sem.poll_acquire(cx));
+ tokio_test::task::spawn(fut)
+}
+
+#[tokio::test]
+async fn it_works() {
+ let sem = Arc::new(Semaphore::new(1));
+ let mut poll_sem = PollSemaphore::new(sem.clone());
+
+ let permit = sem.acquire().await.unwrap();
+ let mut poll = semaphore_poll(&mut poll_sem);
+ assert!(poll.poll().is_pending());
+ drop(permit);
+
+ assert!(matches!(poll.poll(), Poll::Ready(Some(_))));
+ drop(poll);
+
+ sem.close();
+
+ assert!(semaphore_poll(&mut poll_sem).await.is_none());
+
+ // Check that it is fused.
+ assert!(semaphore_poll(&mut poll_sem).await.is_none());
+ assert!(semaphore_poll(&mut poll_sem).await.is_none());
+}