loaf-pause-duration.html

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

<!DOCTYPE HTML>

<meta charset=utf-8>

<title>Long Animation Frame Timing: pause</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: pause</h1>

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

<script>

promise_test(async t => {

  const pause_duration = very_long_frame_duration / 2;

  [entry, script] = await expect_long_frame_with_script(() => t.step_timeout(() => {

    busy_wait(pause_duration);

    const sync_xhr = new XMLHttpRequest();

    sync_xhr.open("GET", `/xhr/resources/delay.py?ms=${pause_duration}`, /*async=*/false);

    sync_xhr.send();

  }, 0), script => (

        script.invoker === "TimerHandler:setTimeout" &&

        script.duration >= very_long_frame_duration), t);

  assert_true("pauseDuration" in script);

  assert_greater_than(script.pauseDuration, pause_duration);

}, "Synchronous XHR should be counted as pauseDuration");

// TODO: Test for alert/confirm, requires WPT infra changes.

</script>

</body>