mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-28 21:09:17 +02:00
97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package global
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import (
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"context"
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"testing"
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"go.opentelemetry.io/otel/internal/internaltest"
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)
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func TestTextMapPropagatorDelegation(t *testing.T) {
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ResetForTest(t)
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ctx := context.Background()
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carrier := internaltest.NewTextMapCarrier(nil)
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// The default should be a noop.
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initial := TextMapPropagator()
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initial.Inject(ctx, carrier)
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ctx = initial.Extract(ctx, carrier)
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if !carrier.GotN(t, 0) || !carrier.SetN(t, 0) {
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return
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}
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// Make sure the delegate woks as expected.
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delegate := internaltest.NewTextMapPropagator("test")
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delegate.Inject(ctx, carrier)
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ctx = delegate.Extract(ctx, carrier)
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if !delegate.InjectedN(t, carrier, 1) || !delegate.ExtractedN(t, ctx, 1) {
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return
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}
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// The initial propagator should use the delegate after it is set as the
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// global.
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SetTextMapPropagator(delegate)
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initial.Inject(ctx, carrier)
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ctx = initial.Extract(ctx, carrier)
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delegate.InjectedN(t, carrier, 2)
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delegate.ExtractedN(t, ctx, 2)
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}
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func TestTextMapPropagatorDelegationNil(t *testing.T) {
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ResetForTest(t)
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ctx := context.Background()
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carrier := internaltest.NewTextMapCarrier(nil)
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// The default should be a noop.
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initial := TextMapPropagator()
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initial.Inject(ctx, carrier)
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ctx = initial.Extract(ctx, carrier)
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if !carrier.GotN(t, 0) || !carrier.SetN(t, 0) {
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return
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}
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// Delegation to nil should not make a change.
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SetTextMapPropagator(nil)
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initial.Inject(ctx, carrier)
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initial.Extract(ctx, carrier)
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if !carrier.GotN(t, 0) || !carrier.SetN(t, 0) {
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return
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}
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}
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func TestTextMapPropagatorFields(t *testing.T) {
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ResetForTest(t)
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initial := TextMapPropagator()
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delegate := internaltest.NewTextMapPropagator("test")
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delegateFields := delegate.Fields()
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// Sanity check on the initial Fields.
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if got := initial.Fields(); fieldsEqual(got, delegateFields) {
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t.Fatalf("testing fields (%v) matched Noop fields (%v)", delegateFields, got)
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}
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SetTextMapPropagator(delegate)
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// Check previous returns from global not correctly delegate.
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if got := initial.Fields(); !fieldsEqual(got, delegateFields) {
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t.Errorf("global TextMapPropagator.Fields returned %v instead of delegating, want (%v)", got, delegateFields)
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}
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// Check new calls to global.
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if got := TextMapPropagator().Fields(); !fieldsEqual(got, delegateFields) {
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t.Errorf("global TextMapPropagator.Fields returned %v, want (%v)", got, delegateFields)
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}
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}
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func fieldsEqual(f1, f2 []string) bool {
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if len(f1) != len(f2) {
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return false
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}
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for i := range f1 {
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if f1[i] != f2[i] {
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return false
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}
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}
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return true
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}
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