refactor app directory structure and add tests

tests/node_modules/nightwatch/lib/page-object/element.js

@@ -0,0 +1,24 @@
+/**
+ * Class that all elements subclass from
+ *
+ * @param {Object} options Element options defined in page object
+ * @constructor
+ */
+function Element(options) {
+  this.parent = options.parent;
+
+  if (!options.selector) {
+    throw new Error('No selector property for element "' + options.name +
+      '" Instead found properties: ' + Object.keys(options));
+  }
+
+  this.name = options.name;
+  this.selector = options.selector;
+  this.locateStrategy = options.locateStrategy || 'css selector';
+}
+
+Element.prototype.toString = function() {
+  return 'Element[name=@' + this.name + ']';
+};
+
+module.exports = Element;