code: /** 
   * Test how manager behaves when the update period value is greater than zero and the scheduler starts.
   * @throws Exception
   */
  @Test public void testManagerWhenSchedulerIsStarted() throws Exception {
    newConfigWithUpdatePeriodValue(1);
    final HttpServletRequest request=Mockito.mock(HttpServletRequest.class);
    final HttpServletResponse response=Context.get().getResponse();
    Mockito.when(request.getRequestURI()).thenReturn("/app/g1.css");
    Context.set(Context.webContext(request,response,Mockito.mock(FilterConfig.class)));
    managerFactory.create().process();
    Thread.sleep(500);
  }
  