DocumentBuilder builder = documentBuilderFactory.newDocumentBuilder(); Document result = builder.newDocument(); DOMResult domResult = new DOMResult(result); marshaller.marshal(flights, domResult); Document expected = builder.newDocument(); Element flightsElement = expected.createElementNS("http://samples.springframework.org/flight", "tns:flights"); Attr namespace = expected.createAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:tns"); namespace.setNodeValue("http://samples.springframework.org/flight"); flightsElement.setAttributeNode(namespace); expected.appendChild(flightsElement); Element flightElement = expected.createElementNS("http://samples.springframework.org/flight", "tns:flight"); flightsElement.appendChild(flightElement); Element numberElement = expected.createElementNS("http://samples.springframework.org/flight", "tns:number"); flightElement.appendChild(numberElement); Text text = expected.createTextNode("42"); numberElement.appendChild(text); assertXMLEqual("Marshaller writes invalid DOMResult", expected, result); } @Test