Tone.js/test/component/CrossFade.js

define(["Tone/component/CrossFade", "helper/Basic", "helper/Offline", "Test", "Tone/signal/Signal"], 
function (CrossFade, Basic, Offline, Test, Signal) {
	describe("CrossFade", function(){

		Basic(CrossFade);

		context("Fading", function(){

			it("handles input and output connections", function(){
				var comp = new CrossFade();
				Test.connect(comp, 0);
				Test.connect(comp, 1);
				comp.connect(Test);
				comp.dispose();
			});

			it("pass 100% of input 0", function(){
				return Offline(function(){
					var crossFade = new CrossFade();
					var drySignal = new Signal(10);
					var wetSignal = new Signal(20);
					drySignal.connect(crossFade, 0, 0);
					wetSignal.connect(crossFade, 0, 1);
					crossFade.fade.value = 0;
					crossFade.toMaster();
				}).then(function(buffer){
					buffer.forEach(function(sample){
						expect(sample).to.closeTo(10, 0.01);
					});
				});
			});

			it("pass 100% of input 1", function(){
				return Offline(function(){
					var crossFade = new CrossFade();
					var drySignal = new Signal(10);
					var wetSignal = new Signal(20);
					drySignal.connect(crossFade, 0, 0);
					wetSignal.connect(crossFade, 0, 1);
					crossFade.fade.value = 1;
					crossFade.toMaster();
				}).then(function(buffer){
					buffer.forEach(function(sample){
						expect(sample).to.closeTo(20, 0.01);
					});
				});
			});
			
			it("can mix two signals", function(){
				return Offline(function(){
					var crossFade = new CrossFade();
					var drySignal = new Signal(2);
					var wetSignal = new Signal(1);
					drySignal.connect(crossFade, 0, 0);
					wetSignal.connect(crossFade, 0, 1);
					crossFade.fade.value = 0.5;
					crossFade.toMaster();
				}).then(function(buffer){
					buffer.forEach(function(sample){
						expect(sample).to.closeTo(2.12, 0.01);
					});
				});
			});
		});
	});
});