Issue 6559 - Replace fromObject with fromMap

test/subscriptionClasses.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 29 matching lines @@
 function compareSubscription(test, url, expected, postInit)
 {
   expected.push("[Subscription]");
   let subscription = Subscription.fromURL(url);
   if (postInit)
     postInit(subscription);
   let result = [];
   subscription.serialize(result);
   test.equal(result.sort().join("\n"), expected.sort().join("\n"), url);
 
-  let map = Object.create(null);
+  let map = new Map();
   for (let line of result.slice(1))
   {
     if (/(.*?)=(.*)/.test(line))
-      map[RegExp.$1] = RegExp.$2;
+      map.set(RegExp.$1, RegExp.$2);
   }
-  let subscription2 = Subscription.fromObject(map);
+  let subscription2 = Subscription.fromMap(map);
   test.equal(subscription.toString(), subscription2.toString(), url + " deserialization");
 }
 
 exports.testSubscriptionClassDefinitions = function(test)
 {
   test.equal(typeof Subscription, "function", "typeof Subscription");
   test.equal(typeof SpecialSubscription, "function", "typeof SpecialSubscription");
   test.equal(typeof RegularSubscription, "function", "typeof RegularSubscription");
   test.equal(typeof ExternalSubscription, "function", "typeof ExternalSubscription");
   test.equal(typeof DownloadableSubscription, "function", "typeof DownloadableSubscription");
@@ skipping 39 matching lines @@
     test, "~wl~", ["url=~wl~", "disabled=true", "title=Test group"],
     subscription =>
     {
       subscription.title = "Test group";
       subscription.disabled = true;
     }
   );
 
   test.done();
 };