Issue 6559 - Replace fromObject with fromMap

test/filterClasses.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 165 matching lines @@
     postInit(filter);
   let result = serializeFilter(filter);
   test.equal(result.sort().join("\n"), expected.sort().join("\n"), text);
 
   // Test round-trip
   let filter2;
   let buffer = [];
   filter.serialize(buffer);
   if (buffer.length)
   {
-    let map = Object.create(null);
+    let map = new Map();
     for (let line of buffer.slice(1))
     {
       if (/(.*?)=(.*)/.test(line))
-        map[RegExp.$1] = RegExp.$2;
+        map.set(RegExp.$1, RegExp.$2);
     }
-    filter2 = Filter.fromObject(map);
+    filter2 = Filter.fromMap(map);
   }
   else
     filter2 = Filter.fromText(filter.text);
 
   test.equal(serializeFilter(filter).join("\n"), serializeFilter(filter2).join("\n"), text + " deserialization");
 }
 
 exports.testFilterClassDefinitions = function(test)
 {
   test.equal(typeof Filter, "function", "typeof Filter");
@@ skipping 338 matching lines @@
     filterRelative.rewriteUrl("http://content.server/file/foo.txt?bar"),
     "http://content.server/file/foo.txt/disable"
   );
   test.equal(
     filterRelative.rewriteUrl("http://example.com/file/foo.txt?bar"),
     "http://example.com/file/foo.txt/disable"
   );
 
   test.done();
 };