1 files changed, 19 insertions, 0 deletions
diff --git a/testing/web-platform/tests/scheduler/task-controller-abort-completed-tasks.any.js b/testing/web-platform/tests/scheduler/task-controller-abort-completed-tasks.any.js
new file mode 100644
index 0000000000..fc96038e64
--- /dev/null
+++ b/testing/web-platform/tests/scheduler/task-controller-abort-completed-tasks.any.js
@@ -0,0 +1,19 @@
+// META: title=Scheduler: Aborting Completed Tasks is a No-op
+// META: global=window,worker
+'use strict';
+
+promise_test(async t => {
+  const controller1 = new TaskController();
+  const controller2 = new TaskController();
+
+  await scheduler.postTask(() => {}, {signal: controller1.signal});
+
+  const task = scheduler.postTask(() => {}, {signal: controller2.signal});
+  controller2.abort();
+  await promise_rejects_dom(t, 'AbortError', task);
+
+  // The tasks associated with these controllers have completed, so this should
+  // not lead to any unhandled rejections.
+  controller1.abort();
+  controller2.abort();
+}, 'Aborting completed tasks should be a no-op.');