<!DOCTYPE HTML>
<html>
<head>
  <title>Test for audio 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 expectedNotification = null;

var observer = {
  observe: function(subject, topic, data) {
    if (expectedNotification !== null) {
      is(topic, "audio-playback", "audio-playback received");
      is(data, expectedNotification, "This is the right notification");
      runTest();
    } else {
      ok(false, "should not receive audio-playback notification!");
    }
  }
};

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

var audio = new Audio();
audio.loop = true;

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

    audio.src = "audio.ogg";
    // Wait for the audio metadata to become available so that we have an audio track.
    audio.onloadedmetadata = runTest;
  },

  // Verify that muting and unmuting dispatches the events as expected.
  function() {
    expectedNotification = 'active';
    audio.play();
  },

  function() {
    expectedNotification = 'inactive-nonaudible';
    audio.volume = 0;
  },

  function() {
    expectedNotification = 'active';
    audio.volume = 1;
  },

  function() {
    expectedNotification = 'inactive-pause';
    audio.pause();
  },

  // Verify that no events are dispatched when volume is set to 0..
  function() {
    expectedNotification = 'active';
    audio.play();
  },

  function() {
    expectedNotification = 'inactive-nonaudible';
    audio.volume = 0;
  },

  function() {
    expectedNotification = null;
    audio.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() {
            audio.onpause = null;
            runTest();
          });
        });
      });
    };
    audio.pause();
  },

  function() {
    expectedNotification = null;
    audio.volume = 1;
    // 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();
        });
      });
    });
  },

  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>