HttpServletRequest request = mock(HttpServletRequest.class);
HttpServletResponse response = mock(HttpServletResponse.class);
StaticContentHandler handler = mock(StaticContentHandler.class);
FilterChain chain = mock(FilterChain.class);
when(handler.requestingStaticFile(request)).thenReturn(true);
vraptor.init(new DoNothingProvider(handler));
vraptor.doFilter(request, response, chain);
verify(handler, times(1)).deferProcessingToContainer(chain, request, response);