assertEquals(1, dataMap.size());
        assertEquals("Valid Field", dataMap.get("valid"));
        assertFalse(dataMap.containsKey(null));
    }

    public void test_getDataMap_mixedFieldsAndLists() throws Exception {
        // Test parsing mixed fields and lists
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + "<doc>\n" + "  <field name=\"title\">Test Title</field>\n"