Issue 7016 - Convert serialization functions into generators

test/filterStorage_readwrite.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 152 matching lines @@
     if (lines.length && lines[lines.length - 1] == "")
       lines.pop();
 
     let importer = FilterStorage.importData();
     for (let line of lines)
       importer(line);
     importer(null);
 
     test.equal(FilterStorage.fileProperties.version, FilterStorage.formatVersion, "File format version");
 
-    let exported = Array.from(FilterStorage.exportData());
+    let exported = [...FilterStorage.exportData()];
     test.deepEqual(canonize(exported), canonize(lines), "Import/export result");
   }).catch(unexpectedError.bind(test)).then(() => test.done());
 };
 
 exports.testSavingWithoutBackups = function(test)
 {
   Prefs.patternsbackups = 0;
   Prefs.patternsbackupinterval = 24;
 
   FilterStorage.saveToDisk().then(() =>
@@ skipping 79 matching lines @@
     return FilterStorage.restoreBackup(1);
   }).then(() =>
   {
     test.equal([...FilterStorage.subscriptions()][0].filters.length, 1, "Filter count after restoring backup");
     return FilterStorage.loadFromDisk();
   }).then(() =>
   {
     test.equal([...FilterStorage.subscriptions()][0].filters.length, 1, "Filter count after reloading");
   }).catch(unexpectedError.bind(test)).then(() => test.done());
 };