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3bce9c97f8
...and propagation.HeaderCarrier to adapt http.Header to this interface. Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
121 lines
3.1 KiB
Go
121 lines
3.1 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package propagation_test
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import (
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"context"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"go.opentelemetry.io/otel/propagation"
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"go.opentelemetry.io/otel/trace"
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)
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const (
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traceIDStr = "4bf92f3577b34da6a3ce929d0e0e4736"
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spanIDStr = "00f067aa0ba902b7"
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)
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var (
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traceID = mustTraceIDFromHex(traceIDStr)
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spanID = mustSpanIDFromHex(spanIDStr)
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)
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func mustTraceIDFromHex(s string) (t trace.TraceID) {
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var err error
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t, err = trace.TraceIDFromHex(s)
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if err != nil {
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panic(err)
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}
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return
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}
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func mustSpanIDFromHex(s string) (t trace.SpanID) {
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var err error
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t, err = trace.SpanIDFromHex(s)
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if err != nil {
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panic(err)
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}
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return
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}
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type outOfThinAirPropagator struct {
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t *testing.T
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}
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var _ propagation.TextMapPropagator = outOfThinAirPropagator{}
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func (p outOfThinAirPropagator) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context {
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sc := trace.SpanContext{
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TraceID: traceID,
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SpanID: spanID,
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TraceFlags: 0,
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}
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require.True(p.t, sc.IsValid())
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return trace.ContextWithRemoteSpanContext(ctx, sc)
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}
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func (outOfThinAirPropagator) Inject(context.Context, propagation.TextMapCarrier) {}
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func (outOfThinAirPropagator) Fields() []string {
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return nil
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}
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type nilCarrier struct{}
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var _ propagation.TextMapCarrier = nilCarrier{}
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func (nilCarrier) Keys() []string {
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return nil
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}
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func (nilCarrier) Get(key string) string {
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return ""
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}
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func (nilCarrier) Set(key string, value string) {}
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func TestMultiplePropagators(t *testing.T) {
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ootaProp := outOfThinAirPropagator{t: t}
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ns := nilCarrier{}
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testProps := []propagation.TextMapPropagator{
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propagation.TraceContext{},
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}
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bg := context.Background()
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// sanity check of oota propagator, ensuring that it really
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// generates the valid span context out of thin air
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{
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ctx := ootaProp.Extract(bg, ns)
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sc := trace.RemoteSpanContextFromContext(ctx)
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require.True(t, sc.IsValid(), "oota prop failed sanity check")
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}
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// sanity check for real propagators, ensuring that they
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// really are not putting any valid span context into an empty
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// go context in absence of the HTTP headers.
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for _, prop := range testProps {
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ctx := prop.Extract(bg, ns)
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sc := trace.RemoteSpanContextFromContext(ctx)
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require.Falsef(t, sc.IsValid(), "%#v failed sanity check", prop)
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}
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for _, prop := range testProps {
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props := propagation.NewCompositeTextMapPropagator(ootaProp, prop)
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ctx := props.Extract(bg, ns)
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sc := trace.RemoteSpanContextFromContext(ctx)
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assert.Truef(t, sc.IsValid(), "%#v clobbers span context", prop)
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}
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}
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