code: @Test public void shouldUseWroConfigurationFoundInServletContext() throws Exception {
    final WroConfiguration config=new WroConfiguration();
    config.setCacheUpdatePeriod(1000);
    when(mockServletContextAttributeHelper.getWroConfiguration()).thenReturn(config);
    doAnswer(new Answer<Void>(){
      public Void answer(    InvocationOnMock invocation) throws Throwable {
        assertSame(config,Context.get().getConfig());
        return null;
      }
    }
  ).when(mockFilterChain).doFilter(Mockito.any(HttpServletRequest.class),Mockito.any(HttpServletResponse.class));
    victim.doFilter(mockRequest,mockResponse,mockFilterChain);
    verify(mockFilterChain,Mockito.times(1)).doFilter(Mockito.any(HttpServletRequest.class),Mockito.any(HttpServletResponse.class));
  }
  