### Question:
UploadMultipartFilter implements Filter { public void init(FilterConfig arg0) throws ServletException { }  void doFilter(ServletRequest request, 
	                        ServletResponse response, 
	                        FilterChain chain); void init(FilterConfig arg0); void destroy();  }### Answer:
@Test public void init_nothingIsInvoked() throws ServletException { objectUnderTest.init(null); }