Added test code

Author: hkoley

MC/config/PWGLF/ini/tests/GeneratorLF_Lambda1520_pp.C

@@ -0,0 +1,138 @@
+int External()
+{
+    std::string path{"o2sim_Kine.root"};
+    int numberOfInjectedSignalsPerEvent{1};
+    int numberOfGapEvents{4};
+    int numberOfEventsProcessed{0};
+    int numberOfEventsProcessedWithoutInjection{0};
+    std::vector<int> injectedPDGs = {
+        3124,    // Lambda(1520)0
+        -3124,   // Lambda(1520)0bar
+    };
+    std::vector<std::vector<int>> decayDaughters = {
+        {2212, -321}, // Lambda(1520)0
+        {-2212, 321}, // Lambda(1520)0bar
+    };
+
+    auto nInjection = injectedPDGs.size();
+
+    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::vector<int> nSignal;
+    for (int i = 0; i < nInjection; i++)
+    {
+        nSignal.push_back(0);
+    }
+    std::vector<std::vector<int>> nDecays;
+    std::vector<int> nNotDecayed;
+    for (int i = 0; i < nInjection; i++)
+    {
+        std::vector<int> nDecay;
+        for (int j = 0; j < decayDaughters[i].size(); j++)
+        {
+            nDecay.push_back(0);
+        }
+        nDecays.push_back(nDecay);
+        nNotDecayed.push_back(0);
+    }
+    auto nEvents = tree->GetEntries();
+    bool hasInjection = false;
+    for (int i = 0; i < nEvents; i++)
+    {
+        hasInjection = false;
+        numberOfEventsProcessed++;
+        auto check = tree->GetEntry(i);
+        for (int idxMCTrack = 0; idxMCTrack < tracks->size(); ++idxMCTrack)
+        {
+            auto track = tracks->at(idxMCTrack);
+            auto pdg = track.GetPdgCode();
+            auto it = std::find(injectedPDGs.begin(), injectedPDGs.end(), pdg);
+            int index = std::distance(injectedPDGs.begin(), it); // index of injected PDG
+            if (it != injectedPDGs.end())                        // found
+            {
+                // count signal PDG
+                nSignal[index]++;
+                if (track.getFirstDaughterTrackId() < 0)
+                {
+                    nNotDecayed[index]++;
+                    continue;
+                }
+                for (int j{track.getFirstDaughterTrackId()}; j <= track.getLastDaughterTrackId(); ++j)
+                {
+                    auto pdgDau = tracks->at(j).GetPdgCode();
+                    bool foundDau = false;
+                    // count decay PDGs
+                    for (int idxDaughter = 0; idxDaughter < decayDaughters[index].size(); ++idxDaughter)
+                    {
+                        if (pdgDau == decayDaughters[index][idxDaughter])
+                        {
+                            nDecays[index][idxDaughter]++;
+                            foundDau = true;
+                            hasInjection = true;
+                            break;
+                        }
+                    }
+                    if (!foundDau)
+                    {
+                        std::cerr << "Decay daughter not found: " << pdg << " -> " << pdgDau << "\n";
+                    }
+                }
+            }
+        }
+        if (!hasInjection)
+        {
+            numberOfEventsProcessedWithoutInjection++;
+        }
+    }
+    std::cout << "--------------------------------\n";
+    std::cout << "# Events: " << nEvents << "\n";
+    for (int i = 0; i < nInjection; i++)
+    {
+        std::cout << "# Mother \n";
+        std::cout << injectedPDGs[i] << " generated: " << nSignal[i] << ", " << nNotDecayed[i] << " did not decay\n";
+        if (nSignal[i] == 0)
+        {
+            std::cerr << "No generated: " << injectedPDGs[i] << "\n";
+            // return 1; // At least one of the injected particles should be generated
+        }
+        for (int j = 0; j < decayDaughters[i].size(); j++)
+        {
+            std::cout << "# Daughter " << decayDaughters[i][j] << ": " << nDecays[i][j] << "\n";
+        }
+        // if (nSignal[i] != nEvents * numberOfInjectedSignalsPerEvent)
+        // {
+        //     std::cerr << "Number of generated: " << injectedPDGs[i] << ", lower than expected\n";
+        //     // return 1; // Don't need to return 1, since the number of generated particles is not the same for each event
+        // }
+    }
+    std::cout << "--------------------------------\n";
+    std::cout << "Number of events processed: " << numberOfEventsProcessed << "\n";
+    std::cout << "Number of input for the gap events: " << numberOfGapEvents << "\n";
+    std::cout << "Number of events processed without injection: " << numberOfEventsProcessedWithoutInjection << "\n";
+    // injected event + numberOfGapEvents*gap events + injected event + numberOfGapEvents*gap events + ...
+    // total fraction of the gap event: numberOfEventsProcessedWithoutInjection/numberOfEventsProcessed
+    float ratioOfNormalEvents = numberOfEventsProcessedWithoutInjection / numberOfEventsProcessed;
+    if (ratioOfNormalEvents > 0.75)
+    {
+        std::cout << "The number of injected event is loo low!!" << std::endl;
+        return 1;
+    }
+
+    return 0;
+}
+
+void GeneratorLF_Resonances_pp1360_injection() { External(); }