@Test public void toSpan_decorates_unsampled() {

  propagationFactory = baggageFactory;
  TraceContext incoming = TraceContext.newBuilder().traceId(1L).spanId(2L).sampled(false).build();
  TraceContext toSpan = tracer.toSpan(incoming).context();
  assertThat(toSpan).isNotSameAs(incoming);
  assertThat(toSpan.extra()).isNotEmpty();
}