added proper test macro

Author: alcaliva

MC/config/PWGLF/ini/tests/GeneratorLFStrangenessInJets_gap4.C

@@ -0,0 +1,28 @@
+#include "TFile.h"
+#include "TTree.h"
+#include <vector>
+#include <iostream>
+#include "SimulationDataFormat/MCTrack.h"
+
+int Hybrid()
+{
+  std::string path{"o2sim_Kine.root"};
+
+  TFile file(path.c_str(), "READ");
+  if (file.IsZombie()) {
+    std::cerr << "Cannot open ROOT file " << path << "\n";
+    return 1;
+  }
+
+  auto tree = (TTree *)file.Get("o2sim");
+  if (!tree) {
+    std::cerr << "Cannot find tree o2sim in file " << path << "\n";
+    return 1;
+  }
+
+  std::vector<o2::MCTrack> *tracks{};
+  tree->SetBranchAddress("MCTrack", &tracks);
+
+  std::cout << "Found " << tree->GetEntries() << " events." << std::endl;
+  return 0;
+}