test_oscillatorNode.html

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<html>

<head>

  <title>Test the OscillatorNode 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">

SimpleTest.waitForExplicitFinish();

addLoadEvent(function() {

  var context = new AudioContext();

  var osc = new OscillatorNode(context);

  is(osc.channelCount, 2, "Oscillator node has 2 input channels by default");

  is(osc.channelCountMode, "max", "Correct channelCountMode for the Oscillator node");

  is(osc.channelInterpretation, "speakers", "Correct channelCountInterpretation for the Oscillator node");

  is(osc.type, "sine", "Correct default type");

  expectException(function() {

    osc.type = "custom";

  }, DOMException.INVALID_STATE_ERR);

  is(osc.type, "sine", "Cannot set the type to custom");

  is(osc.frequency.value, 440, "Correct default frequency value");

  is(osc.detune.value, 0, "Correct default detine value");

  // Make sure that we can set all of the valid type values

  var types = [

    "sine",

    "square",

    "sawtooth",

    "triangle",

];

  for (var i = 0; i < types.length; ++i) {

    osc.type = types[i];

  // Verify setPeriodicWave()

  var real = new Float32Array([1.0, 0.5, 0.25, 0.125]);

  var imag = new Float32Array([1.0, 0.7, -1.0, 0.5]);

  osc.setPeriodicWave(context.createPeriodicWave(real, imag));

  is(osc.type, "custom", "Failed to set custom waveform");

  expectNoException(function() {

    osc.start();

});

  expectNoException(function() {

    osc.stop();

});

  SimpleTest.finish();

});

</script>

</pre>

</body>

</html>