loaf-timeline.html

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This WPT test may be referenced by the following Test IDs:
- /long-animation-frame/tentative/loaf-timeline.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<meta charset=utf-8>

<title>Long Animation Frame Timing: basic</title>

<meta name="timeout" content="long">

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

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

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

<body>

<h1>Long Animation Frame: basic</h1>

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

<script>

promise_test(async t => {

    busy_wait(very_long_frame_duration);

    const is_loaf = entry => entry.duration >= very_long_frame_duration &&

      entry.entryType == "long-animation-frame";

    await new Promise(resolve => t.step_timeout(resolve, 10));

    const entry_from_all = [...performance.getEntries()].find(is_loaf);

    const entry_by_type = [...performance.getEntriesByType("long-animation-frame")].find(is_loaf);

    const entry_by_name = [...performance.getEntriesByName("long-animation-frame")].find(is_loaf);

    assert_true(!!entry_from_all, "LoAF Entry found");

    assert_equals(entry_from_all, entry_by_type);

    assert_equals(entry_from_all, entry_by_name);

}, 'LoAF entries are available in the performnace timeline');

</script>

</body>