track-load-from-element-readyState.html

<!DOCTYPE html>
<title>Load event on HTMLTrackElement and LOADED readyState on TextTrack when src is set on the element</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<video>
  <track src="resources/webvtt-file.vtt" default>
  <script>
  async_test(function(t) {
    var track = document.querySelector("track");
    track.onload = t.step_func_done(function() {
      assert_equals(track.readyState, HTMLTrackElement.LOADED);
    });
  });
  </script>
</video>

chromium/third_party/blink/web_tests/external/wpt/html/semantics/embedded-content/media-elements/track/track-element/track-load-from-element-readyState.html