adding stub for a mock DOM for resource loading testing, per #113

mock-dom-resource-loading.js

@@ -0,0 +1,44 @@
+// Mock for DOM resource loading
+
+(function UMD(name,context,definition){
+	if (typeof define === "function" && define.amd) { define(definition); }
+	else if (typeof module !== "undefined" && module.exports) { module.exports = definition(); }
+	else { context[name] = definition(name,context); }
+})("$DOM",this,function DEF(name,context){
+	"use strict";
+
+	return createDOM;
+
+
+	// **************************************
+
+	function createDOM(opts) {
+		var headElement = {};
+		var baseURI = "";
+
+		var $performance = {
+			getEntriesByName: getEntriesByName,
+		};
+
+		var $document = {
+			head: headElement,
+			baseURI: baseURI,
+			getElementsByTagName: getElementsByTagName,
+			createElement: createElement,
+		};
+
+		var publicAPI = {
+			document: $document,
+			performance: $performance,
+		};
+
+		return publicAPI;
+
+
+		// **************************************
+
+		function getElementsByTagName() {}
+		function createElement() {}
+		function getEntriesByName() {}
+	}
+});