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<!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>
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