19cb67abca
Automatic update from web-platform-tests [LongTasks] Truncate duration to 1 ms resolution Bug: 1146022 Change-Id: I71c726fdb85d432271220c66557a0fc64bdd341d Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2552846 Commit-Queue: Nicolás Peña Moreno <npm@chromium.org> Reviewed-by: Yoav Weiss <yoavweiss@chromium.org> Cr-Commit-Position: refs/heads/master@{#832970} -- wpt-commits: d1aaf685cfb02e0350701550afe4146d555f2461 wpt-pr: 26614
49 lines
1.8 KiB
HTML
49 lines
1.8 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>LongTask Timing: validate long task attributes</title>
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<body>
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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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<h1>Long Task Attributes</h1>
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<div id="log"></div>
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<script>
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async_test(function (t) {
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assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');
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const observer = new PerformanceObserver(
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t.step_func(function (entryList) {
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const entries = entryList.getEntries();
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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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observer.disconnect();
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t.done();
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})
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);
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observer.observe({entryTypes: ['longtask']});
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window.onload = () => {
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/* Generate a slow task */
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const begin = window.performance.now();
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while (window.performance.now() < begin + 60);
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};
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}, 'Performance longtask entries are observable.');
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</script>
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</body>
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