Stringify enums in selectors (#71441)

tests/helpers/test_selector.py

@@ -1,4 +1,6 @@
 """Test selectors."""
+from enum import Enum
+
 import pytest
 import voluptuous as vol
 
@@ -52,6 +54,8 @@ def _test_selector(
     config = {selector_type: schema}
     selector.validate_selector(config)
     selector_instance = selector.selector(config)
+    # We do not allow enums in the config, as they cannot serialize
+    assert not any(isinstance(val, Enum) for val in selector_instance.config.values())
 
     # Use selector in schema and validate
     vol_schema = vol.Schema({"selection": selector_instance})