46 lines
1.4 KiB
HTML
46 lines
1.4 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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promise_test(async t => {
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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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assert_implements(window.PerformanceLongAnimationFrameTiming, 'Lon are not supported.');
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const entry = await new Promise(resolve => new PerformanceObserver(
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t.step_func(entryList => {
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const entries = entryList.getEntries();
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assert_greater_than_equal(entries.length, 1);
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resolve(entries[0]);
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})).observe({entryTypes: ["long-animation-frame"]}));
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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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'renderStart',
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'styleAndLayoutStart',
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'blockingTime',
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'firstUIEventTimestamp'
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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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}, 'Test toJSON() in PerformanceLongAnimationFrameTiming');
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</script>
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</body>
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</html>
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