InternetPageTest: flush dom after interactions

chrome/test/data/webui/settings/internet_page_tests.js

 // Copyright 2017 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.
 
 suite('Internet', function() {
   /** @type {InternetPageElement} */
   var internetPage = null;
 
   /** @type {NetworkSummaryElement} */
   var networkSummary_ = null;
@@ skipping 101 matching lines @@
     test('WiFi', function() {
       api_.addNetworksForTest([
         {GUID: 'wifi1_guid', Name: 'wifi1', Type: 'WiFi'},
         {GUID: 'wifi12_guid', Name: 'wifi2', Type: 'WiFi'},
       ]);
       api_.enableNetworkType('WiFi');
       Polymer.dom.flush();
       var wifi = networkSummary_.$$('#WiFi');
       assertTrue(!!wifi);
       MockInteractions.tap(wifi.$$('button.subpage-arrow'));
+      Polymer.dom.flush();
       var subpage = internetPage.$$('settings-internet-subpage');
       assertTrue(!!subpage);
       assertEquals(2, subpage.networkStateList_.length);
       var networkList = subpage.$$('#networkList');
       assertTrue(!!networkList);
       assertEquals(2, networkList.networks.length);
     });
 
     test('VPN', function() {
       api_.addNetworksForTest([
@@ skipping 25 matching lines @@
             Type: 'ThirdPartyVPN',
             ThirdPartyVPN: {ExtensionID: 'id2', ProviderName: 'pname2'}
           }
         },
       ]);
       api_.onNetworkListChanged.callListeners();
       Polymer.dom.flush();
       var vpn = networkSummary_.$$('#VPN');
       assertTrue(!!vpn);
       MockInteractions.tap(vpn.$$('button.subpage-arrow'));
+      Polymer.dom.flush();
       var subpage = internetPage.$$('settings-internet-subpage');
       assertTrue(!!subpage);
       assertEquals(2, subpage.networkStateList_.length);
       var networkList = subpage.$$('#networkList');
       assertTrue(!!networkList);
       assertEquals(2, networkList.networks.length);
       // TODO(stevenjb): Implement fake management API and test third
       // party provider sections.
     });
   });
 });