only print Scan if test fails

apply pcanals suggestion

only print event entries if error

align indentation of values for easier reading

root/tree/index/index64.ref

@@ -1,36 +1,6 @@
 
 Processing runindex64.C...
-******************************************************************************
-*    Row   *                            run *                          event *
-******************************************************************************
-*        0 *                              8 *                              0 *
-*        1 *                              5 *                              1 *
-*        2 *                              5 *                              3 *
-*        3 *                              5 *                              2 *
-*        4 *                              5 *        1.15292150460684698e+18 *
-*        5 *                              5 *        1.84467440737095516e+19 *
-*        6 *                              0 *                              5 *
-*        7 *                              4 *        1.15292150460684698e+18 *
-*        8 *                              6 *                              3 *
-*        9 *        1.84467440737095516e+19 *        1.15292150460684698e+18 *
-*       10 *        1.15292150460684698e+18 *        1.84467440737095516e+19 *
-*       11 *        1.15292150460684698e+18 *        1.15292150460684698e+18 *
-*       12 *        1.84467440737095516e+19 *        1.84467440737095516e+19 *
-******************************************************************************
 Tree BuildIndex returns 13
-0: Run 8, Event 0 found at entry number: 0
-1: Run 5, Event 1 found at entry number: 1
-2: Run 5, Event 3 found at entry number: 2
-3: Run 5, Event 2 found at entry number: 3
-4: Run 5, Event 1152921504606846975 found at entry number: 4
-5: Run 5, Event 18446744073709551600 found at entry number: -1
-6: Run 0, Event 5 found at entry number: 6
-7: Run 4, Event 1152921504606846975 found at entry number: 7
-8: Run 6, Event 3 found at entry number: 8
-9: Run 18446744073709551600, Event 1152921504606846975 found at entry number: -1
-10: Run 1152921504606846975, Event 18446744073709551600 found at entry number: -1
-11: Run 1152921504606846975, Event 1152921504606846975 found at entry number: 11
-12: Run 18446744073709551600, Event 18446744073709551600 found at entry number: -1
 Entries in chain: 13
 BuildIndex returns 13
 Try to find the position of run=0, event=500 in the chain, as it does not exist, this should return a -1:

root/tree/index/runindex64.C

@@ -10,7 +10,7 @@ const char* fname = "index64.root";
 // There would be a warning if you'd try.
 // More info: https://github.com/root-project/roottest/commit/f3c97809c9064feccaed3844007de9e7c6a5980d and https://github.com/root-project/roottest/commit/9e3843d4bf50bc34e6e15dfe7c027f029417d6c0
 static constexpr bool shortlongdouble = sizeof(long double) < 16; // was true for __APPLE__ and __arm64__
-const Long64_t bigval   = shortlongdouble ?  0xFFFFFFFFFFFF :  0xFFFFFFFFFFFFFFF; // still positive number
+const Long64_t bigval   = shortlongdouble ?  0x0FFFFFFFFFFFF : 0x0FFFFFFFFFFFFFFF; // still positive number
 const ULong64_t biguval = shortlongdouble ?  0xFFFFFFFFFFFF0 : 0xFFFFFFFFFFFFFFF0; // "negative" number
 
 int runindex64(){
@@ -34,13 +34,21 @@ int runindex64(){
     tree->Fill();
   }
   tree->Write();
-  tree->Scan("run:event","","colsize=30");
-
+
+  bool pass = true;
   cout<<"Tree BuildIndex returns "<<tree->BuildIndex("run", "event")<<endl;
   for (size_t i=0; i<sizeof(events)/sizeof(*events); i++) {
     run = runs[i];
     event = events[i];
-    cout << i << ": Run " << run << ", Event " << event << " found at entry number: " << tree->GetEntryNumberWithIndex(run, event) << endl;
+    pass &= (tree->GetEntryNumberWithIndex(run, event) == i);
+  }
+  if (!pass) {
+    tree->Scan("run:event","","colsize=30");
+    for (size_t i=0; i<sizeof(events)/sizeof(*events); i++) {
+      run = runs[i];
+      event = events[i];
+      cout << i << ": Run " << run << ", Event " << event << " found at entry number: " << tree->GetEntryNumberWithIndex(run, event) << endl;
+    }
   }
 
   test(tree);