ServletWrapper { public ServletHolder getServletHolder() { return servletHolder; } protected  ServletWrapper();  ServletWrapper(Servlet s, String urlMapping); ServletHolder getServletHolder(); String getUrl(); @Override boolean equals(Object o); @Override int hashCode();  }
@Test public void testGetServletHolder() throws Exception { MyServlet servlet = new MyServlet(); ServletWrapper wrapper = new ServletWrapper(servlet, "/url"); assertNotNull(wrapper.getServletHolder()); }