@Test
public void testServiceClasses_noServices()
    throws IOException, SAXException, ParserConfigurationException, XPathExpressionException {

  WebXml webxml = new WebXmlBuilder()
      .systemServiceServlet("")
      .systemServiceServletMapping()
      .build();
  List<String> serviceClasses = webxml.endpointsServiceClasses();
  Assert.assertEquals(0, serviceClasses.size());
}