accessibility-overlay-cast-button.html

<!DOCTYPE html>
<html lang="en-US">
<title>Media Controls: overlay cast button accessibility tests</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../media-controls.js"></script>
<video controls></video>
<script>
async_test(t => {
  var video = document.querySelector('video');
  video.src = '../content/test.ogv';

  internals.mediaPlayerRemoteRouteAvailabilityChanged(video, true);

  video.oncanplaythrough = t.step_func_done(_ => {
    var cast_button = overlayCastButton(video);

    assert_equals(cast_button.getAttribute('aria-label'),
                  'play on remote device');

    // Pretend we are casting.
    internals.mediaPlayerPlayingRemotelyChanged(video, true);

    assert_equals(cast_button.getAttribute('aria-label'),
                  'control remote playback');
  });
});
</script>
</html>

chromium/third_party/blink/web_tests/media/controls/accessibility-overlay-cast-button.html