@Test public void parseB3SingleFormat_parent_debug() {

  assertThat(parseB3SingleFormat(traceId + "-" + spanId + "-d-" + parentId).context())
    .isEqualToComparingFieldByField(TraceContext.newBuilder()
      .traceId(Long.parseUnsignedLong(traceId, 16))
      .parentId(Long.parseUnsignedLong(parentId, 16))
      .spanId(Long.parseUnsignedLong(spanId, 16))
      .debug(true).build()
    );
}