Tone.js/test/core/Bus.js

define(["Test", "Tone/core/Bus", "Tone/core/Tone", "helper/Offline", 
	"helper/PassAudio", "Tone/signal/Signal", "Tone/core/Gain", "Tone/component/Merge"], 
	function (Test, Bus, Tone, Offline, PassAudio, Signal, Gain, Merge) {

	describe("Bus", function(){
		it ("provides a send and receive method", function(){
			expect(Tone.prototype.send).is.a("function");
			expect(Tone.prototype.receive).is.a("function");
		});

		it ("passes audio from a send to a receive with the same name", function(){
			return PassAudio(function(input){
				//make them pass through nodes
				var send = new Gain();
				var recv = new Gain().toMaster();
				input.connect(send);
				send.send("test");
				recv.receive("test");
			});
		});	

		it ("can create the recieve before the send", function(){
			return PassAudio(function(input){
				//make them pass through nodes
				var send = new Gain();
				var recv = new Gain().toMaster();
				input.connect(send);
				recv.receive("test");
				send.send("test");
			});
		});		

		it ("passes audio from a send to a receive at the given level", function(){
			return Offline(function(){
				var sig = new Signal(1);
				var recv = new Gain().toMaster();
				sig.send("test", -12);
				recv.receive("test");
			}, 0.05).then(function(buffer){
				buffer.forEach(function(sample){
					expect(sample).to.be.closeTo(0.25, 0.1);
				});
			});
		});	

		it ("can receive from a specific channel", function(){
			return Offline(function(){
				var sig = new Signal(2);
				var recv = new Merge().toMaster();
				sig.send("test");
				recv.receive("test", 1);
			}, 0.05, 2).then(function(buffer){
				buffer.forEach(function(l, r){
					expect(l).to.be.closeTo(0, 0.01);
					expect(r).to.be.closeTo(2, 0.01);
				});
			});
		});		
	});
});