@Before
    public void before() {
        SofaTracerSpan span = (SofaTracerSpan) tracer.buildSpan("test").start();
        SofaTraceContextHolder.getSofaTraceContext().push(span);
    }
@author <a href=mailto:orezsilence@163.com>zhangchengxi</a>
remoting/remoting-triple/src/test/java/com/alipay/sofa/rpc/filter/PressureMarkTransformFilterTest.java