From bb2dd9a1934feff203b69fa97154874ebdd8334e Mon Sep 17 00:00:00 2001
From: Philipp Waller <1090452+philippwaller@users.noreply.github.com>
Date: Mon, 13 Jan 2025 00:15:25 +0100
Subject: [PATCH] fix: handle unhashable schema types like lists to prevent
 unreachable exception

---
 tests/test_lib.py                | 13 +++++--------
 voluptuous_serialize/__init__.py |  4 ++--
 2 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/tests/test_lib.py b/tests/test_lib.py
index e6267fa..9d2317c 100644
--- a/tests/test_lib.py
+++ b/tests/test_lib.py
@@ -1,5 +1,6 @@
 from enum import Enum
 
+import pytest
 import voluptuous as vol
 
 from voluptuous_serialize import UNSUPPORTED, convert
@@ -216,11 +217,7 @@ class TestEnum(Enum):
     } == convert(vol.Schema(vol.Coerce(TestEnum)))
 
 
-def test_invalid_schema():
-    # check if an exception is raised when an invalid schema is passed
-    try:
-        convert(vol.Schema(None))
-    except Exception as e:
-        assert str(e) == "Unable to convert schema: None"
-    else:
-        assert False, "Expected an exception to be raised"
+@pytest.mark.parametrize("invalid_schema", [None, []])
+def test_invalid_schema(invalid_schema):
+    with pytest.raises(ValueError):
+        convert(vol.Schema(invalid_schema))
diff --git a/voluptuous_serialize/__init__.py b/voluptuous_serialize/__init__.py
index 72bd09c..40e5ed6 100644
--- a/voluptuous_serialize/__init__.py
+++ b/voluptuous_serialize/__init__.py
@@ -1,6 +1,6 @@
 """Module to convert voluptuous schemas to dictionaries."""
 
-from collections.abc import Mapping
+from collections.abc import Hashable, Mapping
 from enum import Enum
 
 import voluptuous as vol
@@ -112,7 +112,7 @@ def convert(schema, *, custom_serializer=None):
     if isinstance(schema, vol.Coerce):
         schema = schema.type
 
-    if schema in TYPES_MAP:
+    if isinstance(schema, Hashable) and schema in TYPES_MAP:
         return {"type": TYPES_MAP[schema]}
 
     if isinstance(schema, (str, int, float, bool)):