Initial add of PowerRename from SmartRename repo (#499)

* Initial add of PowerRename from SmartRename repo

src/modules/powerrename/unittests/TestFileHelper.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <filesystem>
+#include <string>
+#include <windows.h>
+
+
+class CTestFileHelper
+{
+public:
+    CTestFileHelper();
+    ~CTestFileHelper();
+
+    bool AddFile(_In_ const std::wstring path);
+    bool AddFolder(_In_ const std::wstring path);
+    const std::filesystem::path GetTempDirectory() { return _tempDirectory; }
+    bool PathExists(_In_ const std::wstring path);
+    std::filesystem::path GetFullPath(_In_ const std::wstring path);
+
+private:
+    bool _CreateTempDirectory();
+    void _DeleteTempDirectory();
+
+    std::filesystem::path _tempDirectory;
+};