### Question:
SentinelZuulPostFilter extends ZuulFilter { @Override public Object run() throws ZuulException { SentinelEntryUtils.tryExitFromCurrentContext(); return null; } SentinelZuulPostFilter();  SentinelZuulPostFilter(int order); @Override String filterType(); @Override int filterOrder(); @Override boolean shouldFilter(); @Override Object run();  }### Answer:
@Test public void testRun() throws Exception { SentinelZuulPostFilter sentinelZuulPostFilter = new SentinelZuulPostFilter(); Object result = sentinelZuulPostFilter.run(); Assert.assertNull(result); }