Tone.js/test/tests/Components.js

define(["tests/Core", "chai", "Tone/component/DryWet", "Tone/core/Master", "Tone/signal/Signal", 
"Tone/component/Recorder", "Tone/component/Panner", "Tone/component/LFO"],
function(coreTest, chai, DryWet, Master, Signal, Recorder, Panner, LFO){
	var expect = chai.expect;

	Master.mute();

	describe("Tone.DryWet", function(){
		this.timeout(1000);

		var dryWet, drySignal, wetSignal, recorder;

		it("can be created and disposed", function(){
			var dw = new DryWet();
			dw.dispose();
		});

		it("pass 100% dry signal", function(done){
			dryWet = new DryWet();
			dryWet.toMaster();
			drySignal = new Signal(10);
			wetSignal = new Signal(20);
			drySignal.connect(dryWet.dry);
			wetSignal.connect(dryWet.wet);
			recorder = new Recorder();
			dryWet.connect(recorder);
			dryWet.setDry(1);
			recorder.record(0.05, 0.1, function(buffers){
				var buffer = buffers[0];
				for (var i = 0; i < buffer.length; i++){
					expect(buffer[i]).to.equal(10);
				}
				done();
				dryWet.dispose();
				drySignal.dispose();
				wetSignal.dispose();
				recorder.dispose();
			});
		});


		it("pass 100% wet signal", function(done){
			dryWet = new DryWet();
			dryWet.toMaster();
			drySignal = new Signal(10);
			wetSignal = new Signal(20);
			drySignal.connect(dryWet.dry);
			wetSignal.connect(dryWet.wet);
			recorder = new Recorder();
			dryWet.connect(recorder);
			dryWet.setWet(1);
			recorder.record(0.05, 0.1, function(buffers){
				var buffer = buffers[0];
				for (var i = 0; i < buffer.length; i++){
					expect(buffer[i]).to.equal(20);
				}
				done();
				dryWet.dispose();
				drySignal.dispose();
				wetSignal.dispose();
				recorder.dispose();
			});
		});
		
		it("can mix two signals", function(done){
			dryWet = new DryWet();
			dryWet.toMaster();
			drySignal = new Signal(10);
			wetSignal = new Signal(20);
			drySignal.connect(dryWet.dry);
			wetSignal.connect(dryWet.wet);
			recorder = new Recorder();
			dryWet.connect(recorder);
			dryWet.setWet(1);
			recorder.record(0.05, 0.1, function(buffers){
				var buffer = buffers[0];
				for (var i = 0; i < buffer.length; i++){
					expect(buffer[i]).to.equal(20);
				}
				done();
				dryWet.dispose();
				drySignal.dispose();
				wetSignal.dispose();
				recorder.dispose();
			});
		});
		
		it("can ramp from dry to wet", function(done){
			dryWet = new DryWet();
			drySignal = new Signal(10);
			wetSignal = new Signal(20);
			drySignal.connect(dryWet.dry);
			wetSignal.connect(dryWet.wet);
			recorder = new Recorder();
			recorder.toMaster();
			dryWet.connect(recorder);
			dryWet.setWet(0);
			dryWet.setWet(1, 0.05);
			recorder.record(0.1, 0.0, function(buffers){
				var buffer = buffers[0];
				expect(buffer[0]).to.be.closeTo(10, 0.01);
				for (var i = 0; i < buffer.length; i++){
					if (buffer[i] === 20){
						expect(recorder.samplesToSeconds(i)).to.be.closeTo(0.05, 0.01);
						break;
					}
				}
				done();
				dryWet.dispose();
				drySignal.dispose();
				wetSignal.dispose();
				recorder.dispose();
			});
		});
	});

	describe("Tone.Recorder", function(){
		this.timeout(1000);

		var recorder = new Recorder();
		recorder.toMaster();

		after(function(){
			recorder.dispose();
		});

		it("can be created and disposed", function(){
			var rec = new Recorder();
			rec.dispose();
		});

		it("can record an incoming signal", function(done){
			var sig = new Signal(1);
			sig.connect(recorder);
			recorder.record(0.001, 0.1, function(buffers){
				var buffer = buffers[0];
				for (var i = 0; i < buffer.length; i++){
					expect(buffer[i]).to.equal(1);
				}
				sig.dispose();
				done();
			});
		});
	});

	describe("Tone.Panner", function(){
		this.timeout(1000);

		var panner = new Panner();
		panner.toMaster();

		after(function(){
			panner.dispose();
		});

		it("can be created and disposed", function(){
			var panner = new Panner();
			panner.dispose();
		});

		it("can pan an incoming signal", function(done){
			var sig = new Signal(1);
			sig.connect(panner);
			var recorder = new Recorder(2);
			panner.connect(recorder);
			//pan hard right
			panner.setPan(1);
			recorder.record(0.01, 0.1, function(buffers){
				var bufferL = buffers[0];
				var bufferR = buffers[1];
				for (var i = 0; i < bufferL.length; i++){
					expect(bufferL[i]).to.equal(0);
					expect(bufferR[i]).to.equal(1);
				}
				sig.dispose();
				recorder.dispose();
				done();
			});
		});
	});

	describe("Tone.LFO", function(){
		this.timeout(1000);

		it("can be created and disposed", function(){
			var l = new LFO();
			l.dispose();
		});

		it("can be started and stopped", function(){
			var lfo = new LFO();
			lfo.start();
			lfo.stop();
			lfo.dispose();
		});

		it("can be creates an oscillation in a specific range", function(done){
			var lfo = new LFO(100, 10, 20);
			lfo.start();
			var recorder = new Recorder();
			lfo.connect(recorder);
			recorder.record(0.01, 0.1, function(buffers){
				var buffer = buffers[0];
				for (var i = 0; i < buffer.length; i++){
					expect(buffer[i]).to.be.within(10, 20);
				}
				lfo.dispose();
				recorder.dispose();
				done();
			});
		});

		it("can change the oscillation range", function(done){
			var lfo = new LFO(100, 10, 20);
			lfo.start();
			lfo.setMin(15);
			var recorder = new Recorder();
			lfo.connect(recorder);
			recorder.record(0.01, 0.1, function(buffers){
				var buffer = buffers[0];
				for (var i = 0; i < buffer.length; i++){
					expect(buffer[i]).to.be.within(15, 20);
				}
				lfo.dispose();
				recorder.dispose();
				done();
			});
		});
	});
});