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

	describe("GreaterThanZero", function(){

		Basic(GreaterThanZero);

		describe("Comparison", function(){

			it("Outputs 0 when the value is less than 0", function(){
				return ConstantOutput(function(){
					var signal = new Signal(-1);
					var gtz = new GreaterThanZero();
					signal.connect(gtz);
					gtz.toMaster();
				}, 0);
			});

			it("Outputs 1 when the value is greater than 0", function(){
				return ConstantOutput(function(){
					var signal = new Signal(1);
					var gtz = new GreaterThanZero();
					signal.connect(gtz);
					gtz.toMaster();
				}, 1);
			});

			if (Supports.WAVESHAPER_0_POSITION){

				it("Outputs 0 when the value is equal to 0", function(){
					return ConstantOutput(function(){
						var signal = new Signal(0);
						var gtz = new GreaterThanZero();
						signal.connect(gtz);
						gtz.toMaster();
					}, 0);
				});
			}

			it("Outputs 1 when the value is slightly above 0", function(){
				return ConstantOutput(function(){
					var signal = new Signal(0.001);
					var gtz = new GreaterThanZero();
					signal.connect(gtz);
					gtz.toMaster();
				}, 1);
			});
		});
	});
});