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Automatic update from web-platform-testsMake longtask WPT layouttests less flaky This CL improves tests in external/wpt/longtask-timing by: * Increasing the length of a longtask from ~51 to ~60 to prevent a coarse performance.now() granularity from affecting the tests. * Wrapping the long tasks or iframes containing longtasks inside onload handlers to ensure that the PerformanceObserver is registered by the time the longtask is executed. Test: third_party/blink/tools/run_web_tests external/wpt/longtask-timing --iterations=1000 did not produce flakes. Bug: 796668 Change-Id: Ic2ce59f7d221566f5443da9e9c7d36c7bd7bbe6f Reviewed-on: https://chromium-review.googlesource.com/1138725 Commit-Queue: Nicolás Peña Moreno <npm@chromium.org> Reviewed-by: Timothy Dresser <tdresser@chromium.org> Cr-Commit-Position: refs/heads/master@{#575396} -- wpt-commits: 930d2ef0ad1f16147953a4804abd808c89e244c9 wpt-pr: 12006
77 lines
No EOL
2.9 KiB
HTML
77 lines
No EOL
2.9 KiB
HTML
<!doctype html>
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<html>
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<head>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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</head>
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<body>
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<script>
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async_test(function (t) {
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if (typeof PerformanceLongTaskTiming === 'undefined') {
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assert_unreached("Longtasks are not supported.");
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t.done();
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}
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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_greater_than_equal(entries.length, 1);
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const entry = entries[0];
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assert_equals(typeof(entry.toJSON), 'function');
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const entryJSON = entry.toJSON();
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assert_equals(typeof(entryJSON), 'object');
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// Check attributes inheritted from PerformanceEntry.
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const performanceEntryKeys = [
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'name',
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'entryType',
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'startTime',
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'duration'
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];
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for (const key of performanceEntryKeys) {
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assert_equals(entryJSON[key], entry[key],
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`entry.toJSON().${key} should match entry.${key}`);
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}
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// Check PerformanceLongTaskTiming specific entries.
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assert_equals(typeof(entryJSON.attribution), 'object');
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const entryJsonAttribution = entryJSON.attribution[0];
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assert_equals(typeof(entryJsonAttribution), 'object');
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assert_equals(entryJSON.attribution.length, entry.attribution.length);
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// Check TaskAttributionTiming toJSON.
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const entryAttribution = entry.attribution[0];
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assert_equals(typeof(entryAttribution.toJSON), 'function');
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const entryAttributionJSON = entryAttribution.toJSON();
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assert_equals(typeof(entryAttributionJSON), 'object');
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// Check TaskAttributionTiming attributes, from both:
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// 1) |entryJsonAttribution| from PerformanceLongTaskTiming.
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// 2) |entryAttributionJSON| from TaskAttributionTiming.
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const taskAttributionTimingKeys = [
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'name',
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'entryType',
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'startTime',
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'duration',
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'containerType',
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'containerSrc',
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'containerId',
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'containerName'
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];
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for (const key of taskAttributionTimingKeys) {
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assert_equals(entryAttributionJSON[key], entryAttribution[key],
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`attribution.toJSON().${key} should match attribution.${key}`);
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assert_equals(entryJsonAttribution[key], entryAttribution[key],
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`entry.toJSON().attribution[0].${key} should match attribution.${key}`);
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}
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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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// Trigger a long 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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}, 'Test toJSON() in PerformanceLongTaskTiming and TaskAttributionTiming');
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</script>
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</body>
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</html> |