### Question:
SentinelZuulPreFilter extends ZuulFilter { @Override public String filterType() { return ZuulConstant.PRE_TYPE; } SentinelZuulPreFilter();  SentinelZuulPreFilter(int order); @Override String filterType(); @Override int filterOrder(); @Override boolean shouldFilter(); @Override Object run();  }### Answer:
@Test public void testFilterType() throws Exception { SentinelZuulPreFilter sentinelZuulPreFilter = new SentinelZuulPreFilter(); Assert.assertEquals(sentinelZuulPreFilter.filterType(), PRE_TYPE); }