<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!--
Create an oscillator of each type and verify that the type is set correctly.
-->
<html>
<head>
<script src="resources/compatibility.js"></script>
<script type="text/javascript" src="resources/audio-testing.js"></script>
<script type="text/javascript" src="../resources/js-test.js"></script>
</head>

<body>
<div id="description"></div>
<div id="console"></div>

<script>
description("Basic test of setting Oscillator node types.");

var sampleRate = 44100;
var renderLengthSeconds = 0.25;

var oscTypes = ["sine", "square", "sawtooth", "triangle", "custom"];

function runTest() 
{
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }
    
    window.jsTestIsAsync = true;
        
    // Create offline audio context.
    var context = new OfflineAudioContext(2, sampleRate * renderLengthSeconds, sampleRate);
    var osc = context.createOscillator();

    // Set each possible oscillator type (except CUSTOM) and verify that the type is correct.
    // Here we're setting the type using WebIDL enum values which are strings.
    for (var k = 0; k < oscTypes.length - 1; ++k) {
        osc.type = oscTypes[k];
        Should("osc.type = '" + oscTypes[k] + "'", osc.type).beEqualTo(oscTypes[k]);
    }

    // Verify that setting a custom type directly does not set the custom type. This test has to be
    // done before using setPeriodicWave.
      
    Should("osc.type = 'custom'", function () {
      osc.type = "custom";
    }).throw('InvalidStateError');

    // Now set a custom oscillator
    var coeffA = new Float32Array([0, 1, 0.5]);
    var coeffB = new Float32Array([0, 0, 0]);        
    var wave = context.createPeriodicWave(coeffA, coeffB);

    Should("osc.setPeriodicWave(wave)", function () {
      osc.setPeriodicWave(wave);
    }).notThrow();
    Should("osc.type", osc.type).beEqualTo("custom");
     
    // Check that numerical values are no longer supported
    var oldType = osc.type;
    osc.type = 0;
    Should("osc.type = 0", osc.type).notBeEqualTo(0);
    Should("osc.type", osc.type).beEqualTo(oldType);

    finishJSTest();
}

runTest();
successfullyParsed = true;

</script>


</body>
</html>