Tone.js/test/examples/Examples.js

define(["Test", "Examples"], function (Test, Examples) {

	var baseUrl = "../examples/";
	if (window.__karma__){
		baseUrl = "/base/examples/";
	}

	function getIframeError(url){
		return new Promise(function(success, error){
			var iframe = document.createElement("iframe");
			iframe.onload = function(){
				iframe.remove();
				success();
			};
			iframe.width = 1;
			iframe.height = 1;
			iframe.src = url;
			document.body.appendChild(iframe);
			//capture the error
			iframe.contentWindow.onerror=function(e) {
				error(e);
			};
		});
	}

	function createTest(url){

		it (url, function(){
			url = baseUrl + url + ".html";
			return testUrl(url).then(getIframeError);
		});
	}

	function testUrl(url){
		return new Promise(function(success, fail){
			var httpRequest = new XMLHttpRequest();
			httpRequest.onreadystatechange = function() {
				if (httpRequest.readyState === 4) {
					if (httpRequest.status === 200) {
						success(url);
					} else {
						fail("404: "+url);
					}
				}
			};
			httpRequest.open("GET", url);
			httpRequest.send();
		});
	}

	context("Examples", function(){

		for (var category in Examples){
			var group = Examples[category];
			for (var name in group){
				var url = group[name];
				createTest(url);
			}
		}
	});
});