MD Settings: Bluetooth: Fix adapter state and discovery

chrome/test/data/webui/settings/fake_bluetooth.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 Fake implementation of chrome.bluetooth for testing.
  */
 cr.define('settings', function() {
   /**
    * Fake of the chrome.bluetooth API.
    * @constructor
    * @implements {Bluetooth}
    */
   function FakeBluetooth() {
-    /** @type {!chrome.bluetooth.AdapterState} */ this.adapterState = {
+    /** @type {!chrome.bluetooth.AdapterState} */ this.adapterState_ = {
       address: '00:11:22:33:44:55:66',
       name: 'Fake Adapter',
       powered: false,
       available: true,
       discovering: false
     };
 
     /** @type {!Array<!chrome.bluetooth.Device>} */ this.devices = [];
   }
 
   FakeBluetooth.prototype = {
     // Public testing methods.
     /** @param {boolean} enabled */
     setEnabled: function(enabled) {
-      this.adapterState.powered = enabled;
-      this.onAdapterStateChanged.callListeners(this.adapterState);
+      this.setAdapterState({powered: enabled});
+    },
+
+    /** @param {!chrome.bluetooth.AdapterState} state*/
+    setAdapterState: function(state) {
+      Object.assign(this.adapterState_, state);
+      this.onAdapterStateChanged.callListeners(
+          Object.assign({}, this.adapterState_));
+    },
+
+    /** @return {!chrome.bluetooth.AdapterState} */
+    getAdapterStateForTest: function() {
+      return Object.assign({}, this.adapterState_);
     },
 
     /** @param {!Array<!chrome.bluetooth.Device>} devices */
     setDevicesForTest: function(devices) {
       for (var d of this.devices)
         this.onDeviceRemoved.callListeners(d);
       this.devices = devices;
       for (var d of this.devices)
         this.onDeviceAdded.callListeners(d);
     },
@@ skipping 18 matching lines @@
         this.onDeviceAdded.callListeners(device);
         return;
       }
       this.devices[index] = device;
       this.onDeviceChanged.callListeners(device);
     },
 
     // Bluetooth overrides.
     /** @override */
     getAdapterState: function(callback) {
-      callback(this.adapterState);
+      callback(Object.assign({}, this.adapterState_));
     },
 
     /** @override */
     getDevice: assertNotReached,
 
     /** @override */
     getDevices: function(callback) {
       callback(this.devices);
     },
 
@@ skipping 13 matching lines @@
 
     /** @override */
     onDeviceChanged: new FakeChromeEvent(),
 
     /** @override */
     onDeviceRemoved: new FakeChromeEvent(),
   };
 
   return {FakeBluetooth: FakeBluetooth};
 });