chromium/third_party/blink/web_tests/http/tests/media/controls/video-controls-overflow-menu-correct-ordering.html

<!DOCTYPE html>
<title>Overflow menu children appear in correct order.</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../../../media-resources/media-controls.js"></script>
<script src="../../../media-resources/overflow-menu.js"></script>

<!--Padding ensures the overflow menu is visible for the tests. -->
<body style="padding-top: 200px; padding-left: 100px">
<video controls></video>
<script>
async_test(function(t) {
  // Set up video
  var video = document.querySelector("video");
  video.src = "../resources/test.ogv";
  video.setAttribute("width", "60");
  // Add captions
  var track = video.addTextTrack("captions");

  // Pretend we have a cast device.
  internals.mediaPlayerRemoteRouteAvailabilityChanged(video, true);

  video.onloadeddata = t.step_func_done(function() {
    var overflowList = getOverflowList(video);
    var children = overflowList.children;

    // The overflow menu should always have the same number of elements.
    // Their visibility will change over time based on the size of the video.
    assert_equals(children.length, 8);

    // Ensure that all of the buttons are visible in the right order
    for (var i = 0; i < children.length; i++) {
      var child = children[i];
      var innerButton = child.children[0];
      assert_equals(internals.shadowPseudoId(child), "-internal-media-controls-overflow-menu-list-item");
      assert_equals(internals.shadowPseudoId(innerButton), overflowButtonsCSS[i]);
      // Items should be visible
      assert_not_equals(getComputedStyle(child).display, "none");
      // Buttons should be visible
      assert_not_equals(getComputedStyle(innerButton).display, "none");
    }
  });
});
</script>
</body>