public void OnRequest_creates_span_if_parent()
{
var tracer = new TestTracer();
var traceContext = new TraceContext();
var interceptor = GetInterceptor(tracer, traceContext);
var request = new HttpRequestMessage(HttpMethod.Get, new Uri("http://www.example.com/api/values"));
// Create parent span
var parentSpan = tracer.BuildSpan("parent").Start();
traceContext.Push(parentSpan);
// Call interceptor
interceptor.OnRequest(request);
var newSpan = (TestSpan)request.Properties[PropertySpan];
Assert.NotSame(parentSpan, newSpan);
}