<!DOCTYPE HTML>
<html>
<head>
  <title>Test OscillatorNode lifetime and sine phase</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script src="webaudio.js" type="text/javascript"></script>
<script class="testbody" type="text/javascript">

const signalLength = 2048;

function createOscillator(context) {
  var osc = context.createOscillator();
  osc.start(0);
  osc.stop(signalLength/context.sampleRate);
  return osc;
}

function connectUnreferencedOscillator(context, destination) {
  var osc = createOscillator(context);
  osc.connect(destination);
}

var gTest = {
  length: signalLength,
  numberOfChannels: 1,
  createGraph(context) {
    var blend = context.createGain();

    connectUnreferencedOscillator(context, blend);
    // Test that the unreferenced oscillator remains alive until it has finished.
    SpecialPowers.forceGC();
    SpecialPowers.forceCC();

    // Create another sine wave oscillator in negative time, which should
    // cancel when mixed with the unreferenced oscillator.
    var oscillator = createOscillator(context);
    oscillator.frequency.value = -440;
    oscillator.connect(blend);

    return blend;
  },
};

runTest();

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