add reading test for plcio

Event/CMakeLists.txt

@@ -37,7 +37,7 @@ install(TARGETS Event DESTINATION lib)
 REFLEX_GENERATE_DICTIONARY(Event ${headers} SELECTION src/selection.xml)
 add_library(EventDict SHARED Event.cxx)
 add_dependencies(EventDict Event-dictgen)
-target_link_libraries(EventDict Event)
+target_link_libraries(EventDict Event ROOT::Core)
 install(TARGETS EventDict DESTINATION lib)
 
 # Headers and Libraries
@@ -53,6 +53,9 @@ install(TARGETS write DESTINATION tests)
 add_test(NAME write COMMAND write)
 set_property(TEST write PROPERTY ENVIRONMENT LD_LIBRARY_PATH=${CMAKE_INSTALL_PREFIX}/lib:$ENV{LD_LIBRARY_PATH})
 
-#add_test(NAME read COMMAND read)
-#set_property(TEST read PROPERTY ENVIRONMENT LD_LIBRARY_PATH=${CMAKE_INSTALL_PREFIX}/lib:$ENV{LD_LIBRARY_PATH})
-#set_property(TEST read PROPERTY DEPENDS write)
+add_executable( read tests/read.cpp )
+target_link_libraries( read EventDict )
+install(TARGETS read DESTINATION tests)
+add_test(NAME read COMMAND read)
+set_property(TEST read PROPERTY ENVIRONMENT LD_LIBRARY_PATH=${CMAKE_INSTALL_PREFIX}/lib:$ENV{LD_LIBRARY_PATH})
+set_property(TEST read PROPERTY DEPENDS write)

Event/tests/read.cpp

+#include "EventHeaderCollection.h"
+#include "MCParticleCollection.h"
+
+#include "podio/EventStore.h"
+#include "podio/ROOTReader.h"
+
+int main(int argc, char* argv[])
+{
+    auto reader = podio::ROOTReader();
+    auto store = podio::EventStore();
+
+    reader.openFile("test.root");
+    store.setReader(&reader);
+
+    unsigned int nEvt = reader.getEntries();
+
+    for (unsigned int i = 0; i < nEvt; ++i ) {
+        //if ( i%10 == 0 ) {
+        //  std::cout << "processing event " << i << std::endl;
+        //}
+
+        auto& hds = store.get<plcio::EventHeaderCollection>("EvtHeaders");
+        if ( hds.isValid() ) {
+            auto header = hds[0];
+            std::cout << "processing event " << header.getEventNumber() << std::endl;
+        }
+        else {
+            return -1;
+        }
+
+        auto& mcc = store.get<plcio::MCParticleCollection>("MCParticles");
+        if ( ! mcc.isValid() ) {
+            return -1;
+        }
+        for ( auto p : mcc ) {
+            std::cout << " particle " << p.getObjectID().index << " has daughters: ";
+            for ( auto it = p.daughters_begin(), end = p.daughters_end(); it != end; ++it ) {
+                std::cout << " " << it->getObjectID().index;
+            }
+            std::cout << "  and parents: ";
+            for ( auto it = p.parents_begin(), end = p.parents_end(); it != end ; ++it ){
+                std::cout << " " << it->getObjectID().index;
+            }
+            std::cout << std::endl;
+        }
+
+        store.clear();
+        reader.endOfEvent();
+    }
+
+    reader.closeFile();
+
+    return 0;
+}

Event/tests/write.cpp

@@ -9,7 +9,7 @@
 
 int main(int argc, char* argv[])
 {
-    std::cout << "start writing test" << std::endl;
+    //std::cout << "start writing test" << std::endl;
 
     auto store = podio::EventStore();
     auto writer = podio::ROOTWriter("test.root", &store);
@@ -23,13 +23,38 @@ int main(int argc, char* argv[])
     const unsigned int nEvt = 100;
 
     for ( unsigned int i = 0; i < nEvt; ++i ) {
-        if ( i%10 == 0 ) {
+        //if ( i%10 == 0 ) {
             std::cout << "processing event " << i << std::endl;
-        }
+        //}
 
         auto header = plcio::EventHeader(i, -99, 9999, "SimDet");
         ehc.push_back(header);
 
+        for ( unsigned int i = 0; i < 10; ++i ) {
+            mcc.create();
+        }
+
+        for ( unsigned int i = 0; i < 4; ++i ) {
+            auto p = mcc[i];
+            for ( unsigned int j = 0; j < 4; ++j ) {
+                unsigned int idx = (2+j) + (i/2)*4;
+                p.addDaughter( mcc[idx] );
+                mcc[idx].addParent( p );
+            }
+        }
+
+        for ( auto p : mcc ) {
+            std::cout << " particle " << p.getObjectID().index << " has daughters: ";
+            for ( auto it = p.daughters_begin(), end = p.daughters_end(); it != end; ++it ) {
+                std::cout << " " << it->getObjectID().index;
+            }
+            std::cout << "  and parents: ";
+            for ( auto it = p.parents_begin(), end = p.parents_end(); it != end ; ++it ){
+                std::cout << " " << it->getObjectID().index;
+            }
+            std::cout << std::endl;
+        }
+
         //////////
         writer.writeEvent();
         store.clearCollections();