code: @Test public void testMethodWithArgs(){
    invocation.setMethodName("echo1");
    invocation.setParameterTypes(new Class<?>[]{String.class});
    invocation.setArguments(new Object[]{"arg1"});
    cacheFilter.invoke(invoker,invocation);
    RpcResult rpcResult1=(RpcResult)cacheFilter.invoke(invoker1,invocation);
    RpcResult rpcResult2=(RpcResult)cacheFilter.invoke(invoker2,invocation);
    Assert.assertEquals(rpcResult1.getValue(),rpcResult2.getValue());
    Assert.assertEquals(rpcResult1.getValue(),"value");
  }
  