Tone.js/test/core/Master.js

define(["Test", "Tone/core/Master", "Tone/core/Tone", "helper/Offline", "helper/PassAudio", "Tone/source/Oscillator", "Tone/core/AudioNode"],
	function (Test, Master, Tone, Offline, PassAudio, Oscillator, AudioNode) {

		describe("Master", function(){
			it("exists", function(){
				expect(Tone.Master).to.exist;
			});

			it("provides a toMaster method", function(){
				expect(AudioNode.prototype.toMaster).is.a("function");
				var gain = Tone.context.createGain();
				expect(gain.toMaster).is.a("function");
				gain.toMaster();
			});

			it("can be muted and unmuted", function(){
				Tone.Master.mute = false;
				expect(Tone.Master.mute).to.be.false;
				Tone.Master.mute = true;
				expect(Tone.Master.mute).to.be.true;
			});

			it("passes audio through", function(){
				return PassAudio(function(input){
					input.toMaster();
				});
			});

			it("passes no audio when muted", function(){
				return Offline(function(){
					new Oscillator().toMaster().start(0);
					Tone.Master.mute = true;
				}).then(function(buffer){
					expect(buffer.isSilent()).to.be.true;
				});
			});

			it("has a master volume control", function(){
				return Offline(function(){
					Tone.Master.volume.value = -20;
					expect(Tone.Master.volume.value).to.be.closeTo(-20, 0.1);
				});
			});

			it("can pass audio through chained nodes", function(){
				return PassAudio(function(input){
					var gain = Tone.context.createGain();
					input.connect(gain);
					Tone.Master.chain(gain);
				});
			});
		});
	});