longtask-in-raf.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /longtask-timing/longtask-in-raf.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<head>

  <meta charset=utf-8>

  <title>LongTask Timing: long task in rAF</title>

  <script src="/resources/testharness.js"></script>

  <script src="/resources/testharnessreport.js"></script>

  <script src="resources/utils.js"></script>

</head>

<body>

  <h1>Long Task: requestAnimationFrame</h1>

  <div id="log"></div>

  <script>

    promise_test(async () => {

      assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');

      await new Promise(resolve => {

        window.addEventListener('load', resolve);

});

      let entries = await new Promise(resolve => {

        new PerformanceObserver(

          entryList => {

            const entries = entryList.getEntries().filter(

              e => e.name == 'self' && e.attribution[0].containerType == 'window');

            if (entries) {

              resolve(entries);

          }).observe({ entryTypes: ['longtask'] });

        const script = document.createElement('script');

        script.src = 'resources/raflongtask.js';

        document.body.appendChild(script);

});

      assert_equals(entries.length, 1,

        'Exactly one entry is expected.');

      const longtask = entries[0];

      checkLongTaskEntry(longtask);

      // Assert the TaskAttributionTiming entry in attribution.

      assert_equals(longtask.attribution.length, 1,

        'Exactly one attribution entry is expected');

      const attribution = longtask.attribution[0];

      assert_equals(attribution.entryType, 'taskattribution');

      assert_equals(attribution.name, 'unknown');

      assert_equals(attribution.duration, 0);

      assert_equals(attribution.startTime, 0);

      assert_equals(attribution.containerType, 'window');

      assert_equals(attribution.containerId, '');

      assert_equals(attribution.containerName, '');

      assert_equals(attribution.containerSrc, '');

    }, 'Performance longtask entries are observable.');

  </script>

</body>