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<!DOCTYPE HTML>
<head>
<meta charset=utf-8>
<title>LongTask Timing: long task in rAF</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/utils.js"></script>
</head>
<body>
<h1>Long Task: requestAnimationFrame</h1>
<div id="log"></div>
<script>
promise_test(async () => {
assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');
await new Promise(resolve => {
window.addEventListener('load', resolve);
});
let entries = await new Promise(resolve => {
new PerformanceObserver(
entryList => {
const entries = entryList.getEntries().filter(
e => e.name == 'self' && e.attribution[0].containerType == 'window');
if (entries) {
resolve(entries);
}
}).observe({ entryTypes: ['longtask'] });
const script = document.createElement('script');
script.src = 'resources/raflongtask.js';
document.body.appendChild(script);
});
assert_equals(entries.length, 1,
'Exactly one entry is expected.');
const longtask = entries[0];
checkLongTaskEntry(longtask);
// Assert the TaskAttributionTiming entry in attribution.
assert_equals(longtask.attribution.length, 1,
'Exactly one attribution entry is expected');
const attribution = longtask.attribution[0];
assert_equals(attribution.entryType, 'taskattribution');
assert_equals(attribution.name, 'unknown');
assert_equals(attribution.duration, 0);
assert_equals(attribution.startTime, 0);
assert_equals(attribution.containerType, 'window');
assert_equals(attribution.containerId, '');
assert_equals(attribution.containerName, '');
assert_equals(attribution.containerSrc, '');
}, 'Performance longtask entries are observable.');
</script>
</body>
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