test: add scoped file helper tests and update test build targets

tests/helpers/scoped_file.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <filesystem>
+#include <stdexcept>
+#include <string>
+
+class ScopedFile {
+public:
+  explicit ScopedFile(std::string fileName) : fileName_(std::move(fileName)) {}
+
+  void throwIfExists() const {
+    if (std::filesystem::exists(fileName_)) {
+      throw std::runtime_error("Test file already exists: " + fileName_);
+    }
+  }
+
+  const std::string &getFileName() const { return fileName_; }
+
+  ~ScopedFile() noexcept(false) {
+    std::error_code ec;
+
+    std::filesystem::remove(fileName_, ec);
+  }
+
+private:
+  std::string fileName_;
+};