chore: standardize security and quality foundations

backend/tests/test_arr_helpers.py

@@ -0,0 +1,24 @@
+import unittest
+
+from backend.app.services.arr import RootFolderNotFoundError, resolve_root_folder_path
+
+
+class _ArrClient:
+    async def get_root_folders(self):
+        return [{"id": 7, "path": "/media/tv"}]
+
+
+class ArrHelperTests(unittest.IsolatedAsyncioTestCase):
+    async def test_resolves_numeric_root_folder_id(self) -> None:
+        self.assertEqual(await resolve_root_folder_path(_ArrClient(), "7", "Sonarr"), "/media/tv")
+
+    async def test_preserves_configured_path(self) -> None:
+        self.assertEqual(await resolve_root_folder_path(_ArrClient(), "/media/movies", "Radarr"), "/media/movies")
+
+    async def test_rejects_missing_root_folder_id(self) -> None:
+        with self.assertRaises(RootFolderNotFoundError):
+            await resolve_root_folder_path(_ArrClient(), "8", "Sonarr")
+
+
+if __name__ == "__main__":
+    unittest.main()