mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-28 21:09:17 +02:00
125 lines
2.8 KiB
Go
125 lines
2.8 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package propagation_test
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import (
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"context"
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"slices"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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"go.opentelemetry.io/otel/propagation"
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)
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type ctxKeyType uint
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var ctxKey ctxKeyType
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type carrier []string
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func (c *carrier) Keys() []string { return nil }
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func (c *carrier) Get(string) string { return "" }
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func (c *carrier) Set(setter, _ string) {
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*c = append(*c, setter)
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}
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type propagator struct {
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Name string
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}
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func (p propagator) Inject(ctx context.Context, carrier propagation.TextMapCarrier) {
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carrier.Set(p.Name, "")
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}
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func (p propagator) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context {
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v := ctx.Value(ctxKey)
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if v == nil {
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ctx = context.WithValue(ctx, ctxKey, []string{p.Name})
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} else {
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orig := v.([]string)
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ctx = context.WithValue(ctx, ctxKey, append(orig, p.Name))
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}
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return ctx
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}
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func (p propagator) Fields() []string { return []string{p.Name} }
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func TestCompositeTextMapPropagatorFields(t *testing.T) {
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a, b1, b2 := propagator{"a"}, propagator{"b"}, propagator{"b"}
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want := map[string]struct{}{
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"a": {},
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"b": {},
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}
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got := propagation.NewCompositeTextMapPropagator(a, b1, b2).Fields()
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if len(got) != len(want) {
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t.Fatalf("invalid fields from composite: %v (want %v)", got, want)
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}
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for _, v := range got {
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if _, ok := want[v]; !ok {
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t.Errorf("invalid field returned from composite: %q", v)
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}
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}
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}
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func TestCompositeTextMapPropagatorInject(t *testing.T) {
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a, b := propagator{"a"}, propagator{"b"}
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c := make(carrier, 0, 2)
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propagation.NewCompositeTextMapPropagator(a, b).Inject(context.Background(), &c)
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if got := strings.Join([]string(c), ","); got != "a,b" {
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t.Errorf("invalid inject order: %s", got)
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}
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}
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func TestCompositeTextMapPropagatorExtract(t *testing.T) {
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a, b := propagator{"a"}, propagator{"b"}
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ctx := context.Background()
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ctx = propagation.NewCompositeTextMapPropagator(a, b).Extract(ctx, nil)
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v := ctx.Value(ctxKey)
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if v == nil {
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t.Fatal("no composite extraction")
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}
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if got := strings.Join(v.([]string), ","); got != "a,b" {
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t.Errorf("invalid extract order: %s", got)
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}
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}
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func TestMapCarrierGet(t *testing.T) {
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carrier := propagation.MapCarrier{
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"foo": "bar",
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"baz": "qux",
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}
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assert.Equal(t, carrier.Get("foo"), "bar")
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assert.Equal(t, carrier.Get("baz"), "qux")
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}
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func TestMapCarrierSet(t *testing.T) {
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carrier := make(propagation.MapCarrier)
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carrier.Set("foo", "bar")
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carrier.Set("baz", "qux")
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assert.Equal(t, carrier["foo"], "bar")
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assert.Equal(t, carrier["baz"], "qux")
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}
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func TestMapCarrierKeys(t *testing.T) {
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carrier := propagation.MapCarrier{
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"foo": "bar",
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"baz": "qux",
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}
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keys := carrier.Keys()
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slices.Sort(keys)
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assert.Equal(t, []string{"baz", "foo"}, keys)
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}
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