[load-from-root] SimClusterMerger and ID assignment tests

SimClusterMerger and ID assignment tests

See merge request abrusamo/pftruth-standalone!10

test/testMergedShowerID.h

+#include "../interface/SimHistoryTool.h"
+
+#include <catch2/catch.hpp>
+
+TEST_CASE("SimHistoryTool_CreateMergedSimClusterID") {
+  std::vector<SimTrack> sts;
+  sts.push_back(SimTrack(1,1, 1, Vector4D(1, 1, 1, 1), 0, 1, Vector3D(1, 1, 1), Vector4D(1, 1, 1, 1)));
+  sts.push_back(SimTrack(2,2, 2, Vector4D(2, 2, 2, 2), 0, 2, Vector3D(2, 2, 2), Vector4D(2, 2, 2, 2)));
+  sts.push_back(SimTrack(3,3, 3, Vector4D(3, 3, 3, 3), 0, 3, Vector3D(3, 3, 3), Vector4D(3, 3, 3, 3)));
+  sts.push_back(SimTrack(4,4, 4, Vector4D(4, 4, 4, 4), 0, 4, Vector3D(4, 4, 4), Vector4D(4, 4, 4, 4)));
+  sts.push_back(SimTrack(5,5, 5, Vector4D(5, 5, 5, 5), 0, 5, Vector3D(5, 5, 5), Vector4D(5, 5, 5, 5)));
+
+  std::vector<SimVertex> svs;
+  svs.push_back(SimVertex(Vector3D(1, 1, 1), 1, 1, 1));
+  SimShower* sc = new SimShower();
+  for (const auto &st : sts) {
+    sc->addG4Tracks(st);
+  }
+  SimHistoryTool sht(sts, svs);
+  int mergedPdgId = sht.createMergedSimClusterID(sc);
+  REQUIRE(mergedPdgId == 1);
+}

test/testMerger.h

+#include <catch2/catch.hpp>
+#include "../interface/SimClusterMerger.h"
+
+TEST_CASE("SimClusterMerger_DefaultConstructor") {
+  SimClusterMerger scMerger;
+  REQUIRE(scMerger.hits() == nullptr);
+  REQUIRE(scMerger.recEnergy(SimCluster()) == 0);
+}
+
+TEST_CASE("SimClusterMerger_ThresholdSetters") {
+  SimClusterMerger scMerger;
+  scMerger.setHighEfracThreshold(0.5);
+  scMerger.setConnectThreshold(0.5);
+  REQUIRE(scMerger.getIsHighEfracThreshold() == 0.5);
+  REQUIRE(scMerger.getConnectThreshold() == 0.5);
+}
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