spin-eventloop-not-longtask.html

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This WPT test may be referenced by the following Test IDs:
- /longtask-timing/spin-eventloop-not-longtask.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<meta charset=utf-8>

<title>LongTask Timing: synchronous XHR</title>

<body>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="resources/utils.js"></script>

<link rel="stylesheet" href="/resource-timing/resources/delay-css.py?delay=1000" />

<h1>Long Task: Spin event loop</h1>

<div id="log"></div>

<script>

setup(() => assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.'));

promise_test(async t => {

    const didReceiveLongTask = false;

    new PerformanceObserver(() => {

        didReceiveLongTask = true;

    }).observe({entryTypes: ['longtask']});

    await new Promise(resolve => window.addEventListener('load', resolve));

    assert_false(didReceiveLongTask);

}, 'Waiting for load event (spinning an event loop), is not a longtask');

</script>

</body>