ArgumentCaptor<HttpServletRequestWrapper> wrapperArg =
ArgumentCaptor.forClass(HttpServletRequestWrapper.class);
FilterChain chain = mock(FilterChain.class);
suf.doFilter(mock(HttpServletRequest.class), mock(ServletResponse.class),
chain);
Mockito.verify(chain).doFilter(wrapperArg.capture(), Mockito.<ServletResponse>anyObject());
HttpServletRequestWrapper wrapper = wrapperArg.getValue();