Issue 6665 - Optimize element hiding emulation filter lookups

test/filterListener.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 14 matching lines @@
 let Filter = null;
 let defaultMatcher = null;
 let SpecialSubscription = null;
 let ElemHideException = null;
 
 exports.setUp = function(callback)
 {
   sandboxedRequire = createSandbox({
     extraExports: {
       elemHide: ["knownFilters"],
-      elemHideEmulation: ["filters"]
+      elemHideEmulation: ["knownFilters"]
     }
   });
 
   // We need to require the filterListener module so that filter changes will be
   // noticed, even though we don't directly use the module here.
   sandboxedRequire("../lib/filterListener");
 
   (
     {FilterStorage} = sandboxedRequire("../lib/filterStorage"),
     {Subscription, SpecialSubscription} = sandboxedRequire("../lib/subscriptionClasses"),
@@ skipping 38 matching lines @@
   for (let filter of elemHide.knownFilters)
   {
     if (filter instanceof ElemHideException)
       result.elemhideexception.push(filter.text);
     else
       result.elemhide.push(filter.text);
   }
 
   let elemHideEmulation = sandboxedRequire("../lib/elemHideEmulation");
   result.elemhideemulation = [];
-  for (let filterText of elemHideEmulation.filters)
+  for (let {text: filterText} of elemHideEmulation.knownFilters)
     result.elemhideemulation.push(filterText);
 
   let types = ["blacklist", "whitelist", "elemhide", "elemhideexception",
                "elemhideemulation"];
   for (let type of types)
   {
     if (!(type in expected))
       expected[type] = [];
     else
       expected[type].sort();
@@ skipping 213 matching lines @@
   checkKnownFilters(test, "disable exception rules", {blacklist: [filter1.text, filter3.text], whitelist: [filter2.text]});
 
   FilterStorage.removeSubscription(subscription4);
   checkKnownFilters(test, "remove subscription from the list", {blacklist: [filter1.text]});
 
   subscription3.disabled = false;
   checkKnownFilters(test, "enable exception rules", {blacklist: [filter1.text], whitelist: [filter2.text]});
 
   test.done();
 };