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
24 lines
829 B
JavaScript
24 lines
829 B
JavaScript
// META: script=resources/utils.js
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async_test(function (t) {
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assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');
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new PerformanceObserver(
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t.step_func_done(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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t.done();
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})
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).observe({entryTypes: ['longtask']});
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window.onload = () => {
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/* Generate a slow microtask */
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Promise.resolve().then(() => {
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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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};
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}, 'A short task followed by a long microtask is observable.');
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