Tone.js/test/signal/Add.js

define(["helper/ConstantOutput", "helper/Basic", "Tone/signal/Add", "Tone/signal/Signal", "Test"], 
function (ConstantOutput, Basic, Add, Signal, Test) {
	describe("Add", function(){

		Basic(Add);

		context("Addition", function(){

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

			it("correctly sums a signal and a number", function(){
				return ConstantOutput(function(){
					var signal = new Signal(0);
					var adder = new Add(3);
					signal.connect(adder);
					adder.toMaster();
				}, 3);
			});

			it("can handle negative values", function(){
				return ConstantOutput(function(){
					var signal = new Signal(10);
					var adder = new Add(-1);
					signal.connect(adder);
					adder.toMaster();
				}, 9);
			});

			it("can sum two signals", function(){
				return ConstantOutput(function(){
					var sigA = new Signal(1);
					var sigB = new Signal(4);
					var adder = new Add();
					sigA.connect(adder, 0, 0);
					sigB.connect(adder, 0, 1);
					adder.toMaster();
				}, 5);
			});
		});
	});
});