@Test public void testDuplicateMapping() throws Exception {
  WebXml webxml=new WebXml();
  ContextConfig config=new ContextConfig();
  File pFile=paramClassResource("org/apache/catalina/startup/DuplicateMappingParamServlet");
  assertTrue(pFile.exists());
  try {
    config.processAnnotationsFile(pFile,webxml,false);
    fail();
  }
 catch (  IllegalArgumentException ex) {
  }
  ServletDef servletDef=webxml.getServlets().get("param");
  assertNull(servletDef);
}