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49 lines
No EOL
1.8 KiB
HTML
49 lines
No EOL
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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<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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var observer = new PerformanceObserver(
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t.step_func(function (entryList) {
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var 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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var longtask = entries[0];
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assert_equals(longtask.entryType, "longtask");
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assert_equals(longtask.name, "same-origin-self");
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assert_greater_than(longtask.duration, 50);
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assert_equals(longtask.startTime, Math.floor(longtask.startTime),
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"startTime expected to have 1 millisecond granularity");
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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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var attribution = longtask.attribution[0];
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assert_equals(attribution.entryType, "taskattribution");
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assert_equals(attribution.name, "frame");
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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.frameId, "");
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assert_equals(attribution.frameName, "");
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assert_equals(attribution.frameSrc, "");
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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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/* Generate a slow task */
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var begin = window.performance.now();
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while (window.performance.now() < begin + 51);
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}, "Performance longtask entries are observable");
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</script>
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</body> |