1 files changed, 36 insertions, 0 deletions
diff --git a/library/alloc/tests/task.rs b/library/alloc/tests/task.rs
new file mode 100644
index 00000000000..034039a1eae
--- /dev/null
+++ b/library/alloc/tests/task.rs
@@ -0,0 +1,36 @@
+use alloc::rc::Rc;
+use alloc::sync::Arc;
+use alloc::task::{LocalWake, Wake};
+use core::task::{LocalWaker, Waker};
+
+#[test]
+#[cfg_attr(miri, should_panic)] // `will_wake` doesn't guarantee that this test will work, and indeed on Miri it fails
+fn test_waker_will_wake_clone() {
+    struct NoopWaker;
+
+    impl Wake for NoopWaker {
+        fn wake(self: Arc<Self>) {}
+    }
+
+    let waker = Waker::from(Arc::new(NoopWaker));
+    let clone = waker.clone();
+
+    assert!(waker.will_wake(&clone));
+    assert!(clone.will_wake(&waker));
+}
+
+#[test]
+#[cfg_attr(miri, should_panic)] // `will_wake` doesn't guarantee that this test will work, and indeed on Miri it fails
+fn test_local_waker_will_wake_clone() {
+    struct NoopWaker;
+
+    impl LocalWake for NoopWaker {
+        fn wake(self: Rc<Self>) {}
+    }
+
+    let waker = LocalWaker::from(Rc::new(NoopWaker));
+    let clone = waker.clone();
+
+    assert!(waker.will_wake(&clone));
+    assert!(clone.will_wake(&waker));
+}