track-default-load-timer-during-parser-block.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/media-elements/track/track-element/track-default-load-timer-during-parser-block.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Default text track delays readyState past HAVE_CURRENT_DATA when resource

  selection runs while the parser is blocked inside the &lt;video&gt;</title>

<meta name="timeout" content="long">

<script src="/common/media.js"></script>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<video>

  <track default kind="captions"

         src="resources/cues-chrono-order.vtt?pipe=trickle(d2)">

  <script>

    // Setting src here triggers resource selection while the parser is still

    // inside <video>. The slow external script below then blocks the parser

    // before the default track has been promoted out of the disabled state,

    // so the default track must still be included in the list of pending text

    // tracks once parsing finishes.

    async_test(function(t) {

        var video = document.querySelector("video");

        var track = document.querySelector("track");

        var trackLoaded = false;

        track.onload = t.step_func(function() {

            trackLoaded = true;

            assert_equals(track.readyState, HTMLTrackElement.LOADED);

});

        track.onerror = t.unreached_func("track failed to load");

        video.oncanplay = t.step_func_done(function() {

            assert_true(trackLoaded,

                "canplay must not fire before the default text track has loaded");

});

        video.src = getVideoURI("/media/test");

});

  </script>

  <script src="/common/slow.py?delay=200"></script>

</video>