chromium/third_party/blink/web_tests/media/controls/doubletap-on-play-button.html

<!DOCTYPE html>
<html>
<title>Test that player will play then pause if double tapped on the overlay play button.</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../media-controls.js"></script>
<script src="overlay-play-button.js"></script>
<body></body>
<script>
async_test(t => {
  // This test is only valid when the overlay play button is enabled.
  enableOverlayPlayButtonForTest(t);

  const video = document.createElement('video');
  video.controls = true;
  video.width = 400;
  video.src = '../content/60_sec_video.webm';
  document.body.appendChild(video);
  let didPause = false;

  video.onplaying = t.step_func(() => {
    if (didPause) {
      t.done();
    } else {
      const coordinates =
        elementCoordinates(mediaControlsOverlayPlayButtonInternal(video));
      doubleTapAtCoordinates(coordinates[0], coordinates[1]);
    }
  });

  video.addEventListener('pause', t.step_func(() => {
    didPause = true;
  }), { once: true });

  video.play();
});
</script>
</html>