deadline-max-timeout-dynamic.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /requestidlecallback/deadline-max-timeout-dynamic.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>window.requestIdleCallback max idle period deadline (dynamic timoeout).</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 () => {

  for (let i = 0; i < getRICRetryCount(); ++i) {

    for (const timeout of [10, 20, 30]) {

      const {before, after} = await new Promise(resolve => requestIdleCallback(async deadline => {

        const before = deadline.timeRemaining();

        const timerPromise = new Promise(resolve => step_timeout(resolve, timeout));

        const after = deadline.timeRemaining();

        await timerPromise;

        resolve({before, after})

}))

      assert_less_than_equal(after, before)

      assert_less_than_equal(after, timeout)

}, 'Check that the deadline is changed if there is a new timeout from within requestIdleCallback.');

</script>

<h1>Test of requestIdleCallback deadline behavior</h1>

<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>