bluetooth: Basic browser tests for chrome://bluetooth-internals.

chrome/browser/resources/bluetooth_internals/bluetooth_internals.js

 // Copyright 2016 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.
 
 /**
  * Javascript for bluetooth_internals.html, served from
  *     chrome://bluetooth-internals/.
  */
 
+// Exposed to get access for testing.
+var adapterClient = null;
+var deviceTable = null;
+
 cr.define('bluetooth_internals', function() {
   /**
    * The implementation of AdapterClient in
    *     device/bluetooth/public/interfaces/adapter.mojom. This also manages the
    *     client-side collection of devices.
    * @constructor
    */
   var AdapterClient = function() {
     this.devices = new device_collection.DeviceCollection([]);
   };
@@ skipping 17 matching lines @@
     /**
      * Updates the cached device.
      * @param {!interfaces.BluetoothDevice.DeviceInfo} deviceInfo
      */
     deviceChanged: function(deviceInfo) {
       console.log(new Date(), deviceInfo);
       this.devices.addOrUpdate(deviceInfo);
     }
   };
 
-  var adapterClient = null;
-
   function initialize() {
     interfaces.initialize()
       .then(function() {
         // Hook up the instance properties.
         AdapterClient.prototype.__proto__ =
             interfaces.BluetoothAdapter.AdapterClient.stubClass.prototype;
 
         adapterClient = new AdapterClient();
         interfaces.DefaultAdapter.setClient(
             interfaces.Connection.bindStubDerivedImpl(adapterClient));
       })
       .then(function() { return adapter.getInfo(); })
       .then(function(response) { console.log('adapter', response.info); })
       .then(function() { return adapter.getDevices(); })
       .then(function(response) {
         response.devices.forEach(adapterClient.deviceAdded,
                                  adapterClient /** this */);
 
-        var deviceTable = new device_table.DeviceTable();
+        deviceTable = new device_table.DeviceTable();
         deviceTable.setDevices(adapterClient.devices);
+        deviceTable.id = 'device-table';
         document.body.appendChild(deviceTable);
       })
       .catch(function(error) { console.error(error); });
   }
 
   return {
     initialize: initialize
   };
 
 });
 
 document.addEventListener('DOMContentLoaded', bluetooth_internals.initialize);