Made sure FilterEngine instances are always initialized

test/BaseJsTest.h

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2013 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 61 matching lines @@
   AdblockPlus::ServerResponse GET(const std::string& url, const AdblockPlus::HeaderList& requestHeaders) const
   {
     throw std::runtime_error("Unexpected GET: " + url);
   }
 };
 
 class LazyFileSystem : public AdblockPlus::FileSystem
 {
   std::tr1::shared_ptr<std::istream> Read(const std::string& path) const
   {
-    while (true)
-      AdblockPlus::Sleep(100000);
-    return std::tr1::shared_ptr<std::istream>();
+    if (path == "patterns.ini")
+    {
+      std::string dummyData("# Adblock Plus preferences\n[Subscription]\nurl=~fl~");
+      return std::tr1::shared_ptr<std::istream>(new std::istringstream(dummyData));
+    }
+    else
+      return std::tr1::shared_ptr<std::istream>();
   }
 
   void Write(const std::string& path,
              std::tr1::shared_ptr<std::ostream> content)
   {
-    while (true)
-      AdblockPlus::Sleep(100000);
   }
 
   void Move(const std::string& fromPath, const std::string& toPath)
   {
-    while (true)
-      AdblockPlus::Sleep(100000);
   }
 
   void Remove(const std::string& path)
   {
-    while (true)
-      AdblockPlus::Sleep(100000);
   }
 
   StatResult Stat(const std::string& path) const
   {
-    while (true)
-      AdblockPlus::Sleep(100000);
-    return StatResult();
+    StatResult result;
+    if (path == "patterns.ini")
+    {
+      result.exists = true;
+      result.isFile = true;
+    }
+    return result;
   }
 
   std::string Resolve(const std::string& path) const
   {
-    return std::string();
+    return path;
   }
 };
 
 class LazyWebRequest : public AdblockPlus::WebRequest
 {
   AdblockPlus::ServerResponse GET(const std::string& url, const AdblockPlus::HeaderList& requestHeaders) const
   {
     while (true)
       AdblockPlus::Sleep(100000);
     return AdblockPlus::ServerResponse();
   }
 };
 
 
 class BaseJsTest : public ::testing::Test
 {
 protected:
   AdblockPlus::JsEnginePtr jsEngine;
 
   virtual void SetUp()
   {
     jsEngine = AdblockPlus::JsEngine::New();
     jsEngine->SetLogSystem(AdblockPlus::LogSystemPtr(new ThrowingLogSystem));
     jsEngine->SetFileSystem(AdblockPlus::FileSystemPtr(new ThrowingFileSystem));
     jsEngine->SetWebRequest(AdblockPlus::WebRequestPtr(new ThrowingWebRequest));
   }
 };
 
 #endif