overflow-menu-background-color.html

<!DOCTYPE html>
<title>Ensure overflow menu has the correct background color.</title>
<meta name="color-scheme" content="dark">
<script src='../../../resources/testharness.js'></script>
<script src='../../../resources/testharnessreport.js'></script>
<script src='../../../media/media-controls.js'></script>
<video controls></video>
<script>
async_test(t => {
  const  video = document.querySelector('video');
  video.src = '../../../media/content/test.ogv';
  const track = video.addTextTrack('captions');

  video.onloadeddata = t.step_func(() => {
    const menu = overflowMenu(video);
    const button = overflowButton(video);

    assert_not_equals(getComputedStyle(button).display, 'none');
    assert_equals(getComputedStyle(menu).display, 'none');

    // Clicking on the button should show the menu.
    singleTapOnControl(button, t.step_func_done(() => {
      assert_not_equals(getComputedStyle(menu).display, 'none');
      assert_equals(getComputedStyle(menu).backgroundColor, 'rgb(59, 59, 59)');
    }));
  });
});
</script>

chromium/third_party/blink/web_tests/virtual/dark-color-scheme/media/overflow-menu-background-color.html