Tone.js/test/source/PulseOscillator.js
2017-10-26 00:49:42 -04:00

102 lines
2.5 KiB
JavaScript

define(["helper/Basic", "Tone/source/PulseOscillator", "helper/Offline", "helper/SourceTests", "helper/OscillatorTests"],
function (BasicTests, PulseOscillator, Offline, SourceTests, OscillatorTests) {
describe("PulseOscillator", function(){
//run the common tests
BasicTests(PulseOscillator);
SourceTests(PulseOscillator);
OscillatorTests(PulseOscillator);
context("Phase Rotation", function(){
it ("can change the phase to 90", function(){
return Offline(function(){
var osc = new PulseOscillator({
"phase" : 90,
"frequency" : 1
});
osc.toMaster();
osc.start(0);
}, 1).then(function(buffer){
buffer.forEach(function(sample, time){
if (time < 0.25){
expect(sample).to.be.within(-1, 0);
} else if (time > 0.25 && time < 0.5){
expect(sample).to.be.within(0, 1);
}
});
});
});
it ("can change the phase to -90", function(){
return Offline(function(){
var osc = new PulseOscillator({
"phase" : 270,
"frequency" : 1
});
osc.toMaster();
osc.start(0);
}, 1).then(function(buffer){
buffer.forEach(function(sample, time){
if (time < 0.25){
expect(sample).to.be.within(0, 1);
} else if (time > 0.25 && time < 0.5){
expect(sample).to.be.within(-1, 0);
}
});
});
});
});
context("Width", function(){
it ("can set the width", function(){
var osc = new PulseOscillator({
"width" : 0.2,
});
expect(osc.width.value).to.be.closeTo(0.2, 0.001);
osc.dispose();
});
it ("outputs correctly with a width of 0", function(){
return Offline(function(){
var osc = new PulseOscillator({
"width" : 0,
"frequency" : 1
});
osc.toMaster();
osc.start(0);
}, 0.9).then(function(buffer){
buffer.forEach(function(sample, time){
if (time > 0.51){
expect(sample).to.be.within(-1, 0);
}
});
});
});
it ("outputs correctly with a width of 0.5", function(){
return Offline(function(){
var osc = new PulseOscillator({
"width" : 0.5,
"frequency" : 1
});
osc.toMaster();
osc.start(0);
}, 1).then(function(buffer){
buffer.forEach(function(sample, time){
if (time <= 0.5){
expect(sample).to.be.within(0, 1);
} else if (time >= 0.51 && time <= 0.7){
expect(sample).to.be.within(-1, 0);
} else if (time > 0.71){
expect(sample).to.be.within(0, 1);
}
});
});
});
});
});
});