[MD Extensions]: Fix sidebar icons

chrome/test/data/webui/extensions/extension_test_util.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** @fileoverview Common utilities for extension ui tests. */
 cr.define('extension_test_util', function() {
   /**
    * A mock to test that clicking on an element calls a specific method.
    * @constructor
    */
@@ skipping 106 matching lines @@
       incognitoAccess: {isEnabled: true, isActive: false},
       location: 'FROM_STORE',
       name: 'Wonderful Extension',
       state: 'ENABLED',
       type: 'EXTENSION',
       version: '2.0',
       views: [{url: baseUrl + 'foo.html'}, {url: baseUrl + 'bar.html'}],
     }, opt_properties);
   }
 
+  /**
+   * Tests that any iron-element child of an HTML element has a corresponding

[michaelpg, 2016/05/05 17:06:27]

iron-icon

[Devlin, 2016/05/05 20:28:32]

whoops, done.

+   * non-empty svg element.
+   * @param {HTMLElement} e The element to check the iron icons in.
+   */
+  function testIronIcons(e) {
+    e.querySelectorAll('* /deep/ iron-icon').forEach(function(icon) {

[michaelpg, 2016/05/05 17:06:27]

out of curiosity, what happens when e == document.body and you call this from
polymer_browser_test_base.js (hint hint)?

[Devlin, 2016/05/05 20:28:32]

Discussed offline, will experiment in a followup cl

+      var svg = icon.$$('svg');
+      expectTrue(!!svg && svg.innerHTML != '',
+                 'icon "' + icon.icon + '" is not present');
+    });
+  }
+
   return {
     ClickMock: ClickMock,
     MockItemDelegate: MockItemDelegate,
     isVisible: isVisible,
     testVisible: testVisible,
     createExtensionInfo: createExtensionInfo,
+    testIronIcons: testIronIcons,
   };
 });