Tone.js/test/signal/GreaterThan.js

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

		Basic(GreaterThan);

		context("Comparison", function(){

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

			it("outputs 0 when signal is less than value", function(){
				return ConstantOutput(function(){
					var signal = new Signal(1);
					var gt = new GreaterThan(20);
					signal.connect(gt);
					gt.toMaster();
				}, 0);
			});

			if (Supports.WAVESHAPER_0_POSITION){

				it("outputs 0 when signal is equal to the value", function(){
					return ConstantOutput(function(){
						var signal = new Signal(10);
						var gt = new GreaterThan(10);
						signal.connect(gt);
						gt.toMaster();
					}, 0);
				});
			}

			it("outputs 1 value is greater than", function(){
				return ConstantOutput(function(){
					var signal = new Signal(0.8);
					var gt = new GreaterThan(0.4);
					signal.connect(gt);
					gt.toMaster();
				}, 1);
			});

			it("can handle negative values", function(){
				return ConstantOutput(function(){
					var signal = new Signal(-2);
					var gt = new GreaterThan(-4);
					signal.connect(gt);
					gt.toMaster();
				}, 1);
			});

			it("can set a new value", function(){
				return ConstantOutput(function(){
					var signal = new Signal(2);
					var gt = new GreaterThan(-100);
					gt.value = 1;
					signal.connect(gt);
					gt.toMaster();
				}, 1);
			});

			it("outputs 0 when first signal is less than second", function(){
				return ConstantOutput(function(){
					var sigA = new Signal(1);
					var sigB = new Signal(4);
					var gt = new GreaterThan();
					sigA.connect(gt, 0, 0);
					sigB.connect(gt, 0, 1);
					gt.toMaster();
				}, 0);
			});

			it("outputs 1 when first signal is greater than second", function(){
				return ConstantOutput(function(){
					var sigA = new Signal(2.01);
					var sigB = new Signal(2);
					var gt = new GreaterThan();
					sigA.connect(gt, 0, 0);
					sigB.connect(gt, 0, 1);
					gt.toMaster();
				}, 1);
			});
		});
	});
});