Tone.js/test/helper/Test.js

/* global mocha*/

define(["Tone/core/Tone", "chai", "Tone/core/Context", "Tone/core/Transport", "Tone/core/Buffer", "@babel/polyfill"], 
	function(Tone, chai, Context, Transport, Buffer, babelPolyfill){

		//add a chai test
		chai.Assertion.addMethod("percentageFrom", function(val, percent){
			new chai.Assertion(this._obj).to.be.closeTo(val, val * percent);
		});

		//silence the logging
		window.TONE_SILENCE_VERSION_LOGGING = true;

		//testing setup
		window.expect = chai.expect;
		mocha.setup({
			ui : "bdd",
			// make this very long cause sometimes the travis CI server is slow
			timeout : 30000
		});

		//point to the relative path of the audio files
		if (window.__karma__){
			Buffer.baseUrl = "/base/test/";
		} else {
			Buffer.baseUrl = "../test/";
		}

		beforeEach(function(){
			if (Transport.bpm.value !== 120){
				Transport.bpm.value = 120;
			}
			if (Transport.timeSignature !== 4){
				Transport.timeSignature = 4;
			}
		});

		Context.on("init", function(){
			Test.input = Tone.context.createGain();
		});

		/**
		 *  The Test object
		 */
		var Test = {
			input : Tone.context.createGain()
		};

		Test.run = function(){
			mocha.run();
		};

		Test.wasDisposed = function(obj){
			for (var prop in obj){
				var member = obj[prop];
				if (typeof member !== "function" &&
				typeof member !== "string" &&
				typeof member !== "number" &&
				typeof member !== "boolean" &&
				typeof member !== "undefined" &&
				prop !== "preset" &&
				!(member instanceof AudioContext) &&
				!obj.constructor.prototype[prop]){
					if (member !== null){
						throw Error("property was not completely disposed: "+prop);
					}
				}
			}
		};

		Test.connect = function(node, inputNumber){
			this.input.connect(node, 0, inputNumber);
			this.input.disconnect();
		};

		Test.whenBetween = function(value, start, stop, callback){
			if (value >= start && value < stop){
				callback();
			}
		};

		//invoked only once
		Test.atTime = function(when, callback){
			var wasInvoked = false;
			return function(time){
				if (time >= when && !wasInvoked){
					callback(time);
					wasInvoked = true;
				}
			};
		};

		return Test;
	});