1 files changed, 14 insertions, 0 deletions
diff --git a/testing/web-platform/tests/scheduler/task-signal-onprioritychange.any.js b/testing/web-platform/tests/scheduler/task-signal-onprioritychange.any.js
new file mode 100644
index 0000000000..7f59e1f1f8
--- /dev/null
+++ b/testing/web-platform/tests/scheduler/task-signal-onprioritychange.any.js
@@ -0,0 +1,14 @@
+// META: title=Scheduler: TaskSignal onprioritychange
+// META: global=window,worker
+'use strict';
+
+async_test(t => {
+  const controller = new TaskController({priority: 'user-visible'});
+  controller.signal.onprioritychange = t.step_func_done((event) => {
+    assert_equals(controller.signal.priority, 'background');
+    assert_equals(event.type, 'prioritychange');
+    assert_equals(event.target.priority, 'background');
+    assert_equals(event.previousPriority, 'user-visible');
+  });
+  controller.setPriority('background');
+}, 'Test that TaskSignal.onprioritychange listens for prioritychange events');