Issue 5137 - [emscripten] Added basic filter storage implementation

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 103 matching lines @@
 };
 
 exports.testSubscriptionDefaults = function(test)
 {
   let tests = [
     ["blocking", "test"],
     ["whitelist", "@@test"],
     ["elemhide", "##test"],
     ["elemhide", "#@#test"],
     ["elemhide", "foo##[-abp-properties='foo']"],
-    ["blocking", "!test"],
-    ["blocking", "/??/"],
+    ["", "!test"],
+    ["", "/??/"],
     ["blocking whitelist", "test", "@@test"],
     ["blocking elemhide", "test", "##test"]
   ];
 
   for (let [defaults, ...filters] of tests)
   {
-    compareSubscription(test, "~user~" + filters.join("~"), ["url=~user~" + filters.join("~"), "defaults= " + defaults], subscription =>
+    let expected = ["url=~user~" + filters.join("~")];
+    if (defaults)
+      expected.push("defaults= " + defaults);
+    compareSubscription(test, "~user~" + filters.join("~"), expected, subscription =>
     {
       for (let text of filters)
       {
         let filter = Filter.fromText(text);
         subscription.makeDefaultFor(filter);
         filter.delete();
       }
     });
   }
   test.done();
@@ skipping 215 matching lines @@
     subscription.errors++;
   }, ["subscription.errors", "http://example.com/"], "Increasing subscription.errors");
   checkNotifications(() =>
   {
     subscription.errors = 0;
   }, ["subscription.errors", "http://example.com/"], "Resetting subscription.erros");
 
   subscription.delete();
   test.done();
 };