dom/media/webvtt/test/mochitest/test_bug1018933.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=1018933
   5 -->
   6 <head>
   7   <meta charset='utf-8'>
   8   <title>Regression test for bug 1018933 - HTMLTrackElement should create only one TextTrack</title>
   9   <script src="/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  11 </head>
  12 <body>
  13 <p id="display"></p>
  14 <div id="content">
  15 </div>
  16 <pre id="test">
  17 <script class="testbody" type="text/javascript">
  18 SimpleTest.waitForExplicitFinish();
  19
  20 var video = document.createElement("video");
  21 video.src = "seek.webm";
  22 video.preload = "auto";
  23
  24 var trackElement = document.createElement("track");
  25 trackElement.src = "basic.vtt";
  26 trackElement.kind = "subtitles";
  27
  28 document.getElementById("content").appendChild(video);
  29 video.appendChild(trackElement);
  30
  31 // Accessing the track now would have caused the bug as the track element
  32 // shouldn't have had time to bind to the tree yet.
  33 trackElement.track.mode = 'showing';
  34
  35 video.addEventListener("loadedmetadata", function run_tests() {
  36   // Re-que run_tests() at the end of the event loop until the track
  37   // element has loaded its data.
  38   if (trackElement.readyState == 1) {
  39     setTimeout(run_tests, 0);
  40     return;
  41   }
  42
  43   is(video.textTracks.length, 1, "Video should have one TextTrack.");
  44   SimpleTest.finish();
  45 });
  46 </script>
  47 </pre>
  48 </body>
  49 </html>