add a unit test for hltInfo

Author: mmusich

HLTrigger/Tools/test/BuildFile.xml

@@ -1,2 +1,4 @@
 <!-- tests convertToRaw utility script -->
 <test name="testConvertToRaw" command="testConvertToRaw.sh"/>
+<!-- tests hltInfoutility script -->
+<test name="testHltInfo" command="check_hlt_info.sh"/>

HLTrigger/Tools/test/check_hlt_info.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+FILE="/store/data/Run2024I/EphemeralHLTPhysics0/RAW/v1/000/386/593/00000/91a08676-199e-404c-9957-f72772ef1354.root"
+
+EXPECTED_OUTPUT=$(cat <<EOF
+process LHC (release CMSSW_14_0_15_patch1)
+
+process HLT (release CMSSW_14_0_15_patch1)
+   HLT menu:   '/cdaq/physics/Run2024/2e34/v1.4.9/HLT/V1'
+   global tag: '140X_dataRun3_HLT_v3'
+EOF
+)
+
+# Run hltInfo and capture its output
+ACTUAL_OUTPUT=$(hltInfo "$FILE")
+
+# Compare using diff
+if diff <(echo "$ACTUAL_OUTPUT") <(echo "$EXPECTED_OUTPUT") > /dev/null; then
+  echo "Output matches expected format."
+  exit 0
+else
+  echo "Output does NOT match expected format."
+  echo
+  echo "---- Expected Output ----"
+  echo "$EXPECTED_OUTPUT"
+  echo "-----------------------"
+  echo
+  echo "---- Actual Output ----"
+  echo "$ACTUAL_OUTPUT"
+  echo "-----------------------"
+  exit 1
+fi