chromium/third_party/blink/web_tests/media/controls/doubletap-to-jump-forwards.html

<!DOCTYPE html>
<html>
<title>Test that player will jump forwards 10 seconds if double tapped.</title>
<script src="../../resources/gesture-util.js"></script>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../media-controls.js"></script>
<video controls width=400 src="../content/60_sec_video.webm"></video>
<script>
async_test(t => {
  const video = document.querySelector('video');
  let time = 0;

  let double_tap_gesture;

  video.addEventListener('playing', t.step_func(() => {
    // Double tap on the right side.
    time = Math.round(video.currentTime);
    const coordinates = videoRightEdgeCoordinates(video);
    double_tap_gesture = doubleTapAt(coordinates[0], coordinates[1]);
  }), { once: true });

  video.ontimeupdate = t.step_func(() => {
    // The time should never be 5 seconds as we skipped over it
    assert_not_equals(Math.round(video.currentTime), 5);
  });

  video.addEventListener('seeked', () => {
    // Check the video advanced 10 seconds
    assert_equals(Math.round(video.currentTime), time + 10);
    double_tap_gesture.then(t.step_func_done());
  }, { once: true });

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