File: post-task-then-detach.html

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<!doctype html>
<title>Scheduler: postTask in Detached Scheduler</title>
<link rel="author" title="Nate Chapin" href="mailto:japhet@chromium.org">
<link rel="help" href="https://github.com/WICG/scheduling-apis">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<script>
'use strict';

async_test(t => {
  onload = () => {
    let didRun = false;
    const frame = document.body.appendChild(document.createElement('iframe'));
    frame.contentWindow.scheduler.postTask(() => { didRun = true; });
    document.body.removeChild(frame);

    // We cannot assume anything about ordering between postTask tasks and
    // non-postTask or postTask tasks from different schedulers, so the best we
    // can do is give the task time to run.
    t.step_timeout(() => {
      assert_false(didRun, 'The task should not have run.');
      t.done();
    }, 10);
  }
}, 'Test scheduler.postTask() from an iframe that is removed before the task runs');

</script>