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