made test use offline context

Fixes #30 and Fixes #9

test/test.js

@@ -31,7 +31,7 @@ function wasDisposed(obj, expect){
 
 var allTests = ["tests/Core", "tests/Timing", "tests/Signal", "tests/SignalComparison", 
 "tests/SignalMath", "tests/Transport", "tests/Sources", "tests/Components", "tests/Effect", "tests/Instruments"];
-// var allTests = ["tests/Core", "tests/Instruments"];
+// var allTests = ["tests/Core", "tests/Signal", "tests/Transport", "tests/Sources"];
 
 require(allTests, function(){
 	mocha.run(); 

test/tests/Common.js

@@ -0,0 +1,86 @@
+define(["Tone/core/Tone", "chai", "Tone/component/Recorder"],function(Tone, chai, Recorder){
+
+	var expect = chai.expect;
+
+	var audioContext = Tone.context;
+
+	var recorder = new Recorder();
+
+	var noFun = function(){};
+
+	function offlineTest(duration, setup, test, end){
+		setup = setup || noFun;
+		test = test || noFun;
+		end = end || noFun;
+		var sampleRate = 44100;
+		var offline = new OfflineAudioContext(1, sampleRate * duration, sampleRate);
+		offline.oncomplete = function(e){
+			var buffer = e.renderedBuffer.getChannelData(0);
+			for (var i = 0; i < buffer.length; i++){
+				test(buffer[i], i / sampleRate);
+			}
+			end();
+		};
+		Tone.setContext(offline);
+		setup(offline.destination);
+		offline.startRendering();
+	}
+
+	function offlineStereoTest(duration, setup, test, end){
+		setup = setup || noFun;
+		test = test || noFun;
+		end = end || noFun;
+		var sampleRate = 44100;
+		var offline = new OfflineAudioContext(2, sampleRate * duration, sampleRate);
+		offline.oncomplete = function(e){
+			var bufferL = e.renderedBuffer.getChannelData(0);
+			var bufferR = e.renderedBuffer.getChannelData(1);
+			for (var i = 0; i < bufferL.length; i++){
+				test(bufferL[i], bufferR[i], i / sampleRate);
+			}
+			end();
+		};
+		Tone.setContext(offline);
+		setup(offline.destination);
+		offline.startRendering();
+	}
+
+	function onlineTest(duration, setup, test, end){
+		setup = setup || noFun;
+		test = test || noFun;
+		end = end || noFun;
+		Tone.setContext(audioContext);
+		var sampleRate = audioContext.sampleRate;
+		setup(recorder);
+		recorder.record(duration, 0.1, function(buffers){
+			var buffer = buffers[0];
+			for (var i = 0; i < buffer.length; i++){
+				test(buffer[i], i / sampleRate - 0.1);
+			}
+			end();
+		});
+	}
+
+	function wasDisposed(obj){
+		for (var prop in obj){
+			var member = obj[prop];
+			if (typeof member !== "function" && 
+				typeof member !== "string" && 
+				typeof member !== "number" &&
+				typeof member !== "boolean" &&
+				!(member instanceof AudioContext)){
+				expect(obj[prop]).to.equal(null);
+			}
+		}
+	}
+
+	return {
+		offlineTest : offlineTest,
+		offlineStereoTest : offlineStereoTest,
+		wasDisposed : wasDisposed,
+		onlineTest : onlineTest,
+		onlineContext : function(){
+			Tone.setContext(audioContext);
+		}
+	};
+});