LayoutTests/media/audio-garbage-collect.html

   1 <!DOCTYPE HTML>
   2
   3 <html>
   4 <body>
   5
   6 <p>Tests that we don't garbage collect playing audio object or event listener.</p>
   7 <p>According to http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html,<br />
   8 "4.8.10.8 Playing the media resource",<br />
   9 "Media elements must not stop playing just because all references to them have
  10 been removed; only once a media element is in a state where no further audio
  11 could ever be played by that element may the element be garbage collected."<br /><br />
  12 (see https://bugs.webkit.org/show_bug.cgi?id=66878, https://bugs.webkit.org/show_bug.cgi?id=70421, and http://crbug.com/62604 for more details).</p>
  13 <p id="result">
  14 FAIL: Test either still running or stopped prematurely.
  15 </p>
  16
  17 <script src=../resources/gc.js></script>
  18 <script src=media-file.js></script>
  19 <script src=video-test.js></script>
  20 <script type="text/javascript">
  21
  22 var num_players = 4;
  23 var play_times = 5;
  24
  25 function finish() {
  26     document.getElementById("result").innerText = "PASS";
  27     if (window.layoutTestController) {
  28         layoutTestController.notifyDone();
  29     }
  30 }
  31
  32 function start() {
  33     var num_played = 0;
  34     var audioFile = findMediaFile("audio", "content/silence");
  35     var a = new Audio(audioFile);
  36     a.addEventListener('ended', function() {
  37         num_played ++;
  38         if (num_played < play_times) {
  39             a.currentTime = a.duration - 0.35;
  40             a.play();
  41             if (num_played == play_times - 1) {
  42                 a = null;
  43                 gc();
  44             }
  45         } else {
  46             num_players --;
  47             if (num_players == 0)
  48                 start();
  49             else
  50                 finish();
  51         }
  52     });
  53     a.addEventListener('canplaythrough', function() {
  54         a.currentTime = a.duration - 0.35;
  55         a.play();
  56     });
  57 }
  58
  59 start();
  60
  61 </script>
  62 </body>
  63 </html>