autoplay-with-slow-text-tracks.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/media-elements/ready-states/autoplay-with-slow-text-tracks.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>autoplay with slow text tracks</title>

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

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

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

<div id="log"></div>

<script>

setup({ single_test: true });

// https://html.spec.whatwg.org/#ready-states says:

//

// HAVE_FUTURE_DATA: "the text tracks are ready".

// HAVE_ENOUGH_DATA: All the conditions described for the HAVE_FUTURE_DATA state are met, ...

//

// When the ready state of a media element whose networkState is not NETWORK_EMPTY changes,

// the user agent must follow the steps given below:

// If the new ready state is HAVE_ENOUGH_DATA

// (autoplay)

//

// So if the text tracks are not yet ready, we can't autoplay.

var started = 0;

var numOfTests = 5;

function createTest() {

  var video = document.createElement('video');

  video.src = getVideoURI('/media/movie_5');

  video.autoplay = true;

  video.muted = true;

  video.controls = true;

  video.onplaying = function() {

    started++;

    assert_equals(track.track.cues.length, 1);

    if (started === numOfTests) {

      done();

};

  var track = document.createElement('track');

  track.src = '/media/foo.vtt?pipe=trickle(d2)';

  track.default = true;

  video.appendChild(track);

  document.body.appendChild(video);

for (var i = 0; i < numOfTests; ++i) {

  createTest();

</script>