Issue 5183 - Provide async interface for FileSystem

test/BaseJsTest.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef MOCKS_H
 #define MOCKS_H
 
+#include <thread>
+
 #include <AdblockPlus.h>
 #include <gtest/gtest.h>
 #include "../src/Thread.h"
 
 // Strictly speaking in each test there should be a special implementation of
 // an interface, which is merely referenced by a wrapper and the latter should
 // be injected into JsEngine or what ever. However the everthing a test often
 // actually needs is the access to pending tasks. Therefore instantiation of
 // implemenation of an interface, creation of shared tasks and sharing them
 // with tasks in test is located in this class.
@@ skipping 64 matching lines @@
 class ThrowingLogSystem : public AdblockPlus::LogSystem
 {
 public:
   void operator()(LogLevel logLevel, const std::string& message,
         const std::string& source)
   {
     throw std::runtime_error("Unexpected error: " + message);
   }
 };
 
-class ThrowingFileSystem : public AdblockPlus::FileSystem
-{
-public:
-  std::shared_ptr<std::istream> Read(const std::string& path) const
+class ThrowingFileSystem : public AdblockPlus::IFileSystem, public AdblockPlus::FileSystem
+{
+public:
+  IOBuffer Read(const std::string& path) const
   {
     throw std::runtime_error("Not implemented");
   }
   void Read(const std::string& path,
             const ReadCallback& callback) const
   {
     throw std::runtime_error("Not implemented");
   }
 
-  void Write(const std::string& path, std::istream& content)
-  {
-    throw std::runtime_error("Not implemented");
-  }
-  void Write(const std::string& path, std::istream& data,
+  void Write(const std::string& path, const IOBuffer& content)
+  {
+    throw std::runtime_error("Not implemented");
+  }
+  void Write(const std::string& path, const IOBuffer& data,
              const Callback& callback)
   {
     throw std::runtime_error("Not implemented");
   }
 
   void Move(const std::string& fromPath, const std::string& toPath)
   {
     throw std::runtime_error("Not implemented");
   }
   void Move(const std::string& fromPath, const std::string& toPath,
@@ skipping 18 matching lines @@
   void Stat(const std::string& path,
             const StatCallback& callback) const
   {
     throw std::runtime_error("Not implemented");
   }
 
   std::string Resolve(const std::string& path) const
   {
     throw std::runtime_error("Not implemented");
   }
-  void Resolve(const std::string& path,
-               const ResolveCallback& callback) const
-  {
-    throw std::runtime_error("Not implemented");
-  }
 };
 
 class ThrowingWebRequest : public AdblockPlus::IWebRequest
 {
 public:
   void GET(const std::string& url, const AdblockPlus::HeaderList& requestHeaders, const GetCallback&) override
   {
     throw std::runtime_error("Unexpected GET: " + url);
   }
 };
 
-class LazyFileSystem : public AdblockPlus::FileSystem
-{
-public:
-  std::shared_ptr<std::istream> Read(const std::string& path) const
+class LazyFileSystem : public AdblockPlus::IFileSystem, public AdblockPlus::FileSystem
+{
+public:
+  IOBuffer Read(const std::string& path) const
   {
     std::string dummyData("");
     if (path == "patterns.ini")
       dummyData = "# Adblock Plus preferences\n[Subscription]\nurl=~fl~";
     else if (path == "prefs.json")
       dummyData = "{}";
-    return std::shared_ptr<std::istream>(new std::istringstream(dummyData));
+    return IOBuffer(dummyData.cbegin(), dummyData.cend());
   }
 
   void Read(const std::string& path, const ReadCallback& callback) const
   {
-  }
-
-  void Write(const std::string& path, std::istream& content)
-  {
-  }
-
-  void Write(const std::string& path, std::istream& data,
+    std::thread([this, path, callback]
+    {
+      auto data = Read(path);
+      callback(std::move(data), "");
+    }).detach();
+  }
+
+  void Write(const std::string& path, const IOBuffer& content)
+  {
+  }
+
+  void Write(const std::string& path, const IOBuffer& data,
              const Callback& callback)
   {
+    std::thread([this, path, data, callback]
+    {
+      Write(path, data);
+      callback("");
+    }).detach();
   }
 
   void Move(const std::string& fromPath, const std::string& toPath)
   {
   }
 
   void Move(const std::string& fromPath, const std::string& toPath,
             const Callback& callback)
   {
+    std::thread([this, fromPath, toPath, callback]
+    {
+      Move(fromPath, toPath);
+      callback("");
+    }).detach();
   }
 
   void Remove(const std::string& path)
   {
   }
 
   void Remove(const std::string& path, const Callback& callback)
   {
+    std::thread([this, path, callback]
+    {
+      Remove(path);
+      callback("");
+    }).detach();
   }
 
   StatResult Stat(const std::string& path) const
   {
     StatResult result;
     if (path == "patterns.ini")
     {
       result.exists = true;
       result.isFile = true;
     }
     return result;
   }
 
-  void Stat(const std::string& path,
-            const StatCallback& callback) const
-  {
+  void Stat(const std::string& path, const StatCallback& callback) const
+  {
+    std::thread([this, path, callback]
+    {
+      callback(Stat(path), "");
+    }).detach();
   }
 
   std::string Resolve(const std::string& path) const
   {
     return path;
-  }
-
-  void Resolve(const std::string& path,
-               const ResolveCallback& callback) const
-  {
   }
 };
 
 class NoopWebRequest : public AdblockPlus::IWebRequest
 {
 public:
   void GET(const std::string& url, const AdblockPlus::HeaderList& requestHeaders, const GetCallback& callback) override
   {
   }
 };
@@ skipping 42 matching lines @@
 protected:
   AdblockPlus::JsEnginePtr jsEngine;
 
   virtual void SetUp()
   {
     jsEngine = CreateJsEngine();
   }
 };
 
 #endif