requestidlecallback/deadline-max.html

<!DOCTYPE html>
<title>window.requestIdleCallback max idle period deadline.</title>
<meta name="timeout" content="long">
<link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/ric-utils.js"></script>
<script>

promise_test(async done => {
  for (let i = 0; i < getRICRetryCount(); ++i)
    assert_less_than_equal(await getDeadlineForNextIdleCallback(), 50)

}, 'Check that the deadline is less than 50ms.');
</script>
<h1>Test of requestIdleCallback deadline behavior</h1>
<p>This test validates that deadlines returned for requestIdleCallback are less than 50ms.</p>
<p>The test can pass accidentally as idle deadlines have a maximum but they can always be shorter.
It runs multiple times to expose potential failures.</p>
<div id="log"></div>