doubletap-to-jump-backwards-at-start.html

<!DOCTYPE html>
<html>
<title>Test that player will jump to the beginning if it's in the first 10 seconds.</title>
<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 count = 0;

  video.addEventListener('playing', t.step_func(() => {
    // Double tap on the left side.
    const coordinates = videoLeftEdgeCoordinates(video);
    doubleTouchAtCoordinates(coordinates[0], coordinates[1]);
  }), { once: true });

  video.ontimeupdate = t.step_func(() => {
    // The time should reach 0 seconds twice, the first time when playing and
    // the second because of tapping.
    if (Math.round(video.currentTime) == 0) {
      count++;

      if (count == 2)
       t.done();
    }
  });

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

chromium/third_party/blink/web_tests/media/controls/doubletap-to-jump-backwards-at-start.html