@Test
    fun `client does not create new span_id if parent null`() {
        val cliWithEvents = ClientFilters.RequestTracing()
            .then(
                ResponseFilters.ReportHttpTransaction {
                    println("REQUEST:" + it.request)
                })
            .then({ Response(OK) })

        ZipkinTraces.setForCurrentThread(ZipkinTraces(TraceId("trace_id"), TraceId("span_id"), null))
        cliWithEvents(Request(Method.GET, "/parentNull"))

        ZipkinTraces.setForCurrentThread(ZipkinTraces(TraceId("trace_id"), TraceId("span_id"), TraceId("parent_id")))
        cliWithEvents(Request(Method.GET, "/parentNotNull"))
    }

REQUEST:GET /parentNull HTTP/1.1
x-b3-traceid: trace_id
x-b3-spanid: span_id
x-b3-sampled: 1


REQUEST:GET /parentNotNull HTTP/1.1
x-b3-traceid: trace_id
x-b3-spanid: 588dc95032d588ca
x-b3-parentspanid: span_id
x-b3-sampled: 1

REQUEST:GET /parentNull HTTP/1.1
x-b3-traceid: trace_id
x-b3-spanid: span_id  ******* THIS IS WRONG SHOULD BE A NEW SPAN ID ******
**** THERE SHOULD BE x-b3-parentspanid: span_id*******
x-b3-sampled: 1