MockTracerSampledSpans is a helper function that returns only sampled spans from MockTracer.

BaggageKey is used for testing baggage propagation.

BaggageValue is used for testing baggage propagation.

Jaeger is Uber's tracer, baggage-capable, Zipkin-style trace IDs.

Mock tracer, baggage-capable, non-Zipkin trace IDs.

Noop is for the default no-op tracer from OpenTracing.

EncodingInfo describes the encoding used with tracing propagation test.

PropagationTestCase describes a single propagation test case and expected results.

PropagationTestSuite is a collection of test cases for a certain encoding.

TraceHandler is a base class for testing tracing propagation.

TracingRequest tests tracing capabilities in a given server.

TracingResponse captures the trace info observed in the server and its downstream calls.

TracerType is a convenient enum to indicate which type of tracer is being used in the test.

TracingCall is used in a few other structs here.