def test_partial_update_should_handle_empty_string_id(self):
        """Test handling of empty string as document ID
        
        This test verifies that partial updates can correctly handle empty string document IDs.
        """
        res = self.config.document.partial_update_documents([{
            '_id': '',
            'int_field': 100
        }], self.index)
        self.assertTrue(res.errors)
        self.assertIn("document id can't be empty", res.items[0].error.lower())
Test handling of empty string as document ID
        
        This test verifies that partial updates can correctly handle empty string document IDs.
        
tests/integ_tests/core/document/test_partial_update_semi_structured.py