@Test
public void testCheckBaggageLength() {

    SofaTracer sofaTracer = mock(SofaTracer.class);
    SofaTracerSpanContext sofaTracerSpanContext = new SofaTracerSpanContext();
    SofaTracerSpan sofaTracerSpan = new SofaTracerSpan(sofaTracer, System.currentTimeMillis(),
        "mock", sofaTracerSpanContext, new HashMap<>());
    assertTrue(TracerUtils.checkBaggageLength(sofaTracerSpan, "key", "value"));
}