adds polyfill for Event for IE

test/helpers.js

@@ -1,7 +1,7 @@
 /* global QUnit:false, module:false, test:false, asyncTest:false, expect:false */
 /* global start:false, stop:false ok:false, equal:false, notEqual:false, deepEqual:false */
 /* global notDeepEqual:false, strictEqual:false, notStrictEqual:false, raises:false */
-define(function treeDataFactory (require) {
+define(function helpersFactory (require) {
 	var $ = require('jquery');
 
 	var KEYMAP = {

test/tests.js

@@ -41,6 +41,21 @@ define(function testWrapper (require) {
 		};
 	});
 
+	(function polyFillEventForIE () {
+		if ( typeof window.Event === 'function' ) return false;
+
+		function Event ( event, params ) {
+			params = params || { bubbles: false, cancelable: false, detail: undefined };
+			var evt = document.createEvent( 'Event' );
+			evt.initEvent( event, params.bubbles, params.cancelable, params.detail );
+			return evt;
+		}
+
+		Event.prototype = window.Event.prototype;
+
+		window.Event = Event;
+	})();
+
 	require('moment');
 	require('./test/checkbox-test');
 	require('./test/combobox-test');