Update testing/benchmark_hooks.py

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: shenxianpeng

testing/benchmark_hooks.py

@@ -29,13 +29,15 @@
     },
 ]
 
-# Automatically find all C/C++ files in testing/ (and optionally src/, include/)
-TARGET_FILES = (
+# Automatically find all C/C++ files in testing/
+TARGET_FILES = sorted(
     glob.glob("testing/**/*.c", recursive=True)
-    + glob.glob("testing/**/*.cpp", recursive=True)
-    + glob.glob("testing/**/*.h", recursive=True)
-    + glob.glob("testing/**/*.hpp", recursive=True)
+     glob.glob("testing/**/*.cpp", recursive=True)
+     glob.glob("testing/**/*.h", recursive=True)
+     glob.glob("testing/**/*.hpp", recursive=True)
 )
+if not TARGET_FILES:
+    raise SystemExit("No C/C++ target files found under testing/.")
 
 REPEATS = 5
 RESULTS_FILE = "testing/benchmark_results.txt"