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<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1018933
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  <meta charset='utf-8'>
  <title>Regression test for bug 1018933 - HTMLTrackElement should create only one TextTrack</title>
  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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<pre id="test">
<script class="testbody" type="text/javascript">
SimpleTest.waitForExplicitFinish();

var video = document.createElement("video");
video.src = "seek.webm";
video.preload = "auto";

var trackElement = document.createElement("track");
trackElement.src = "basic.vtt";
trackElement.kind = "subtitles";

document.getElementById("content").appendChild(video);
video.appendChild(trackElement);

// Accessing the track now would have caused the bug as the track element
// shouldn't have had time to bind to the tree yet.
trackElement.track.mode = 'showing';

video.addEventListener("loadedmetadata", function run_tests() {
  // Re-que run_tests() at the end of the event loop until the track
  // element has loaded its data.
  if (trackElement.readyState == 1) {
    setTimeout(run_tests, 0);
    return;
  }

  is(video.textTracks.length, 1, "Video should have one TextTrack.");
  SimpleTest.finish();
});
</script>
</pre>
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