Add checks

Author: njacazio

MC/config/ALICE3/ini/tests/pythia8_pp_clr-blc0_13tev.C

@@ -0,0 +1,19 @@
+int External()
+{
+  std::string path{"o2sim_Kine.root"};
+
+  TFile file(path.c_str(), "read");
+  if (file.IsZombie()) {
+    std::cerr << "Cannot open ROOT file " << path << std::endl;
+    return 1;
+  }
+
+  TTree* tree = (TTree*)file.Get("o2sim");
+
+  if (!tree) {
+    std::cerr << "Cannot find tree o2sim in file " << path << "\n";
+    return 1;
+  }
+
+  return 0;
+}

MC/config/ALICE3/ini/tests/pythia8_pp_clr-blc2_13tev.C

@@ -0,0 +1 @@
+pythia8_pp_clr-blc0_13tev.C

MC/config/ALICE3/ini/tests/pythia8_pp_clr-blc3_13tev.C

@@ -0,0 +1 @@
+pythia8_pp_clr-blc0_13tev.C