String result = XmlUtil.stripInvalidXMLCharacters(input);
        assertNotNull(result);
    }

    public void test_getDataMap_simpleField() throws Exception {
        // Test parsing simple field
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + "<doc>\n" + "  <field name=\"title\">Test Title</field>\n" + "</doc>";