dom/base/test/test_noAudioNotification.html


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<!DOCTYPE HTML>
<html>
<head>
  <title>Test for video controller in windows</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<pre id="test">
</pre>

<script type="application/javascript">

SimpleTest.waitForExplicitFinish();

var observer = {
  observe: function(subject, topic, data) {
    ok(false, "should not receive audio-playback notification!");
  }
};

var observerService = SpecialPowers.Cc["@mozilla.org/observer-service;1"]
                                   .getService(SpecialPowers.Ci.nsIObserverService);

var video = document.createElement("video");
video.loop = true;
video.src = "noaudio.webm";

video.onplay = video.onpause  = function() {
  // Yield to the event loop a few times to make sure that audio-playback is not dispatched.
  SimpleTest.executeSoon(function() {
    SimpleTest.executeSoon(function() {
      SimpleTest.executeSoon(function() {
        runTest();
      });
    });
  });
};

var tests = [
  function() {
    observerService.addObserver(observer, "audio-playback", false);
    ok(true, "Observer set");
    runTest();
  },

  function() {
    video.play();
  },

  function() {
    video.pause();
  },

  function() {
    observerService.removeObserver(observer, "audio-playback");
    ok(true, "Observer removed");
    runTest();
  }
];

function runTest() {
  if (!tests.length) {
    SimpleTest.finish();
    return;
  }

  var test = tests.shift();
  test();
}

runTest();

</script>
</body>
</html>