Stub HTMLElement and customElements for node tests

Author: dmarcos

tests/node/test.js

@@ -1,6 +1,7 @@
 /* eslint-env mocha */
 'use strict';
 
+// require('')
 const path = require('path');
 const assert = require('chai').assert;
 const jsdom = require('jsdom');
@@ -11,6 +12,8 @@ suite('node acceptance tests', function () {
     global.navigator = _window.navigator;
     global.document = _window.document;
     global.screen = {};
+    global.HTMLElement = _window.Element;
+    global.window.customElements = {define: function () {}};
   });
 
   teardown(function () {