More test coverage (71%)

tests/test_fsutil_extra.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+
+def test_stat_triplet_falls_back_to_numeric_ids(tmp_path: Path, monkeypatch):
+    """If uid/gid cannot be resolved, stat_triplet should return numeric strings."""
+    from enroll.fsutil import stat_triplet
+
+    p = tmp_path / "f"
+    p.write_text("x", encoding="utf-8")
+    os.chmod(p, 0o644)
+
+    import grp
+    import pwd
+
+    def _no_user(_uid):  # pragma: no cover - executed via monkeypatch
+        raise KeyError
+
+    def _no_group(_gid):  # pragma: no cover - executed via monkeypatch
+        raise KeyError
+
+    monkeypatch.setattr(pwd, "getpwuid", _no_user)
+    monkeypatch.setattr(grp, "getgrgid", _no_group)
+
+    owner, group, mode = stat_triplet(str(p))
+
+    assert owner.isdigit()
+    assert group.isdigit()
+    assert mode == "0644"