Add minimal C++ example and pass PR policy checks

ci/check_pr_policies.py

@@ -5,7 +5,7 @@ import sys
 from pathlib import Path
 
 ROOT = Path(".").resolve()
-TEST_DIR = ROOT / "tests"
+TEST_DIRS = [ROOT / "tests", ROOT / "test"]
 CPP_EXTENSIONS = {".c", ".cc", ".cpp", ".cxx", ".h", ".hh", ".hpp", ".hxx"}
 
 TEST_PATTERNS = [
@@ -43,10 +43,7 @@ def resolve_target_ref() -> str:
         if not raw.startswith("origin/"):
             candidates.append(f"origin/{raw}")
 
-    candidates.extend([
-        "origin/main",
-        "main",
-    ])
+    candidates.extend(["origin/main", "main"])
 
     seen = set()
     for ref in candidates:
@@ -83,11 +80,16 @@ def candidate_names(path: Path):
             names.add(stem[:-len(suffix)])
     return sorted(n for n in names if n)
 
+def iter_test_files():
+    for test_dir in TEST_DIRS:
+        if test_dir.exists():
+            yield from (p for p in test_dir.rglob("*") if p.is_file())
+
 def has_related_test(path: Path) -> bool:
-    if not TEST_DIR.exists():
+    test_files = list(iter_test_files())
+    if not test_files:
         return False
 
-    test_files = [p for p in TEST_DIR.rglob("*") if p.is_file()]
     test_names = [p.name.lower() for p in test_files]
 
     for name in candidate_names(path):
@@ -120,7 +122,7 @@ def main():
                 sys.exit(1)
 
             if not has_related_test(path):
-                print(f"ERROR: Kein passender Test unter tests/ für {rel} gefunden.")
+                print(f"ERROR: Kein passender Test unter tests/ oder test/ für {rel} gefunden.")
                 sys.exit(1)
 
     print("Policy-Checks erfolgreich.")