filter.doFilter(request, response, chain);
Assert.assertEquals(0, appStat.getSessionStatDataList().size());
filter.destroy();
Assert.assertFalse(WebAppStatManager.getInstance().getWebAppStatSet().contains(appStat));
Assert.assertFalse(StatFilterContext.getInstance().getListeners().contains(filter.getStatFilterContextListener()));
Map<String, Object> statData = appStat.getStatData();