chromium/third_party/blink/web_tests/media/controls/controls-video-keynav-space.html

<DOCTYPE html>
<title>Test media controls video keyboard navigation for space bar</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../media-controls.js"></script>
<video controls></video>
<script>
test(_ => {
  assert_true('eventSender' in window);
}, 'eventSender required');

async_test(function(t) {
  var video = document.querySelector("video");
  video.src = "../content/test.ogv";
  assert_equals(video.volume, 1);
  assert_equals(video.currentTime, 0);

  // Focus the video.
  video.focus();

  video.addEventListener('canplaythrough', t.step_func(() => {
    video.addEventListener('play', t.step_func(() => {
      assert_false(video.paused);
      video.addEventListener('pause', t.step_func_done(() => {
        assert_true(video.paused);
      }), { once: true });
      // 'Space' again pauses the video.
      eventSender.keyDown(" ");
    }), { once: true });
    // 'Space' plays the video.
    eventSender.keyDown(" ");
  }), { once : true });
});
</script>