From f6fa2fd6a0d5dcdbb4b02d92c44de6233d5561f9 Mon Sep 17 00:00:00 2001
From: DaanDeMeyer <daan.j.demeyer@gmail.com>
Date: Sun, 5 Oct 2025 22:46:01 +0200
Subject: [PATCH] test: add unit tests for parents_below() utility function

---
 tests/test_util.py | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 tests/test_util.py

diff --git a/tests/test_util.py b/tests/test_util.py
new file mode 100644
index 000000000..8796b7826
--- /dev/null
+++ b/tests/test_util.py
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+from pathlib import Path
+
+import pytest
+
+from mkosi.util import parents_below
+
+
+def test_parents_below_basic() -> None:
+    path = Path("/a/b/c/d/e")
+    below = Path("/a/b")
+    assert parents_below(path, below) == [Path("/a/b/c/d"), Path("/a/b/c")]
+
+
+def test_parents_below_root() -> None:
+    path = Path("/a/b/c")
+    below = Path("/")
+    assert parents_below(path, below) == [Path("/a/b"), Path("/a")]
+
+
+def test_parents_below_direct_child() -> None:
+    path = Path("/a/b/c")
+    below = Path("/a/b")
+    assert parents_below(path, below) == []
+
+
+def test_parents_below_relative_paths() -> None:
+    path = Path("a/b/c/d")
+    below = Path("a/b")
+    assert parents_below(path, below) == [Path("a/b/c")]
+
+
+def test_parents_below_same_path_raises() -> None:
+    path = Path("/a/b/c")
+    below = Path("/a/b/c")
+    with pytest.raises(ValueError):
+        parents_below(path, below)
+
+
+def test_parents_below_not_parent_raises() -> None:
+    path = Path("/a/b/c")
+    below = Path("/x/y/z")
+    with pytest.raises(ValueError):
+        parents_below(path, below)
+
+
+def test_parents_below_below_is_child_raises() -> None:
+    path = Path("/a/b")
+    below = Path("/a/b/c")
+    with pytest.raises(ValueError):
+        parents_below(path, below)
-- 
2.47.3