Issue 4864 - Start using ESLint for adblockpluschrome

qunit/tests/prefs.js

-/* globals preparePrefs, restorePrefs */
-
 "use strict";
 
 (function()
 {
   const {Prefs} = require("prefs");
 
   module("Preferences", {
     setup()
     {
-      preparePrefs.call(this);
+      this._pbackup = Object.create(null);
+      for (let pref in Prefs)
+      {
+        let value = Prefs[pref];
+        this._pbackup[pref] = value;
+      }
+      Prefs.enabled = true;
     },
 
     teardown()
     {
-      restorePrefs.call(this);
+      for (let pref in this._pbackup)
+        Prefs[pref] = this._pbackup[pref];
     }
   });
 
   function checkPrefExists(name, expectedValue, description, assert)
   {
     let done = assert.async();
     let key = "pref:" + name;
     chrome.storage.local.get(key, items =>
     {
       equal(key in items, expectedValue, description);
@@ skipping 121 matching lines @@
     delete Prefs.notificationdata.foo;
     delete Prefs.notificationdata.bar;
     Prefs.notificationdata = JSON.parse(JSON.stringify(Prefs.notificationdata));
     deepEqual(
       Prefs.notificationdata, {},
       "Prefs object returns the correct value after setting pref to " +
       "default value"
     );
   });
 }());