Add utility to test actions

src/outpack/util.py

@@ -0,0 +1,14 @@
+from pathlib import Path
+
+
+def find_file_descend(filename, path):
+    path = Path(path)
+    root = Path(path.root)
+
+    while path != root:
+        attempt = path / filename
+        if attempt.exists():
+            return str(attempt.parent)
+        path = path.parent
+
+    return None

tests/test_util.py

@@ -0,0 +1,8 @@
+from outpack.util import find_file_descend
+
+
+def test_find_descend(tmp_path):
+    (tmp_path / "a" / "b" / "c" / "d").mkdir(parents=True)
+    (tmp_path / "a" / "b" / ".foo").mkdir(parents=True)
+    assert find_file_descend(".foo", tmp_path / "a/b/c/d") == str(tmp_path / "a/b")
+    assert find_file_descend(".foo", tmp_path / "a") is None