Refactor tests, use fixtures and avoid duplication

test/BaseJsTest.h

+#ifndef MOCKS_H
+#define MOCKS_H
+
+#include <AdblockPlus.h>
+#include <gtest/gtest.h>
+
+class ThrowingErrorCallback : public AdblockPlus::ErrorCallback
+{
+public:
+  void operator()(const std::string& message)
+  {
+    throw std::runtime_error("Unexpected error: " + message);
+  }
+};
+
+class ThrowingFileSystem : public AdblockPlus::FileSystem
+{
+  std::tr1::shared_ptr<std::istream> Read(const std::string& path) const
+  {
+    throw std::runtime_error("Not implemented");
+  }
+
+  void Write(const std::string& path,
+             std::tr1::shared_ptr<std::ostream> content)
+  {
+    throw std::runtime_error("Not implemented");
+  }
+
+  void Move(const std::string& fromPath, const std::string& toPath)
+  {
+    throw std::runtime_error("Not implemented");
+  }
+
+  void Remove(const std::string& path)
+  {
+    throw std::runtime_error("Not implemented");
+  }
+
+  StatResult Stat(const std::string& path) const
+  {
+    throw std::runtime_error("Not implemented");
+  }
+};
+
+class ThrowingWebRequest : public AdblockPlus::WebRequest
+{
+  AdblockPlus::ServerResponse GET(const std::string& url, const AdblockPlus::HeaderList& requestHeaders) const
+  {
+    throw std::runtime_error("Unexpected GET: " + url);
+  }
+};
+
+class BaseJsTest : public ::testing::Test
+{
+protected:
+  AdblockPlus::JsEnginePtr jsEngine;
+
+  virtual void SetUp()
+  {
+    jsEngine = AdblockPlus::JsEngine::New();
+    jsEngine->SetErrorCallback(AdblockPlus::ErrorCallbackPtr(new ThrowingErrorCallback));
+    jsEngine->SetFileSystem(AdblockPlus::FileSystemPtr(new ThrowingFileSystem));
+    jsEngine->SetWebRequest(AdblockPlus::WebRequestPtr(new ThrowingWebRequest));
+  }
+};
+
+#endif