test_maxChannelCount.html

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<html>

<head>

  <title>Test the AudioContext.destination interface</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script type="text/javascript" src="webaudio.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<pre id="test">

<script class="testbody" type="text/javascript">

// Work around bug 911777

SpecialPowers.forceGC();

SpecialPowers.forceCC();

SimpleTest.waitForExplicitFinish();

addLoadEvent(function() {

  var ac = new AudioContext();

  ok(ac.destination.maxChannelCount > 0, "We can query the maximum number of channels");

  var oac = new OfflineAudioContext(2, 1024, 48000);

  is(oac.destination.maxChannelCount, 2, "This OfflineAudioContext should have 2 max channels.");

  oac = new OfflineAudioContext(6, 1024, 48000);

  is(oac.destination.maxChannelCount, 6, "This OfflineAudioContext should have 6 max channels.");

  expectException(function() {

    oac.destination.channelCount = oac.destination.channelCount + 1;

  }, DOMException.INDEX_SIZE_ERR);

  SimpleTest.finish();

});

</script>

</pre>

</body>

</html>