+ " <servlet-class>s1class</servlet-class>".trim()
+ " </servlet>".trim()
+ "</web-app>";
Document doc = builder.parse(new ByteArrayInputStream(xml.getBytes()));
WebXml webXml = new WebXml(doc);
webXml.addFilter(createFilterElement(doc, "f1", "f1class"));
NodeList order = doc.getDocumentElement().getChildNodes();
assertEquals("filter", order.item(0).getNodeName());
assertEquals("#comment", order.item(1).getNodeName());
assertEquals("servlet", order.item(2).getNodeName());
}