File: test_video_control_no_control_overlay.html

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<!DOCTYPE HTML>
<html>
<head>
  <title>Show 'click-to-play' icon on blocked autoplay media</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <script type="application/javascript">
/**
 * This test is used to check whether 'click-to-play' icon would be showed
 * correctly when autoplay media is blocked.
 */
add_task(async function testShowClickToPlayWhenAutoplayMediaGetsBlocked() {
  info(`setting testing pref`);
  await SpecialPowers.pushPrefEnv(
    {"set": [["media.autoplay.default", 1 /* BLOCKED */]]}
  );

  info(`create video and load resource`);
  let video = document.createElement('video');
  video.src = "gizmo.mp4";
  document.body.appendChild(video);

  info(`blocking autoplay would reject media to play`);
  ok(await video.play().then(_ => false, _ => true), "Play got rejected");

  info(`'click-to-play' should display when autoplay media is blocked`);
  const button = SpecialPowers.wrap(video).openOrClosedShadowRoot.querySelector(".clickToPlay");
  ok(!button.hidden, "Click-to-play button is not hidden");
});

</script>
</head>
<body>
</body>
</html>