mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-12 10:04:29 +02:00
3bce9c97f8
...and propagation.HeaderCarrier to adapt http.Header to this interface. Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
// Copyright The OpenTelemetry Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package propagation_test
|
|
|
|
import (
|
|
"context"
|
|
"strings"
|
|
"testing"
|
|
|
|
"go.opentelemetry.io/otel/propagation"
|
|
)
|
|
|
|
type ctxKeyType uint
|
|
|
|
var (
|
|
ctxKey ctxKeyType = 0
|
|
)
|
|
|
|
type carrier []string
|
|
|
|
func (c *carrier) Keys() []string { return nil }
|
|
|
|
func (c *carrier) Get(string) string { return "" }
|
|
|
|
func (c *carrier) Set(setter, _ string) {
|
|
*c = append(*c, setter)
|
|
}
|
|
|
|
type propagator struct {
|
|
Name string
|
|
}
|
|
|
|
func (p propagator) Inject(ctx context.Context, carrier propagation.TextMapCarrier) {
|
|
carrier.Set(p.Name, "")
|
|
}
|
|
|
|
func (p propagator) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context {
|
|
v := ctx.Value(ctxKey)
|
|
if v == nil {
|
|
ctx = context.WithValue(ctx, ctxKey, []string{p.Name})
|
|
} else {
|
|
orig := v.([]string)
|
|
ctx = context.WithValue(ctx, ctxKey, append(orig, p.Name))
|
|
}
|
|
return ctx
|
|
}
|
|
|
|
func (p propagator) Fields() []string { return []string{p.Name} }
|
|
|
|
func TestCompositeTextMapPropagatorFields(t *testing.T) {
|
|
a, b1, b2 := propagator{"a"}, propagator{"b"}, propagator{"b"}
|
|
|
|
want := map[string]struct{}{
|
|
"a": {},
|
|
"b": {},
|
|
}
|
|
got := propagation.NewCompositeTextMapPropagator(a, b1, b2).Fields()
|
|
if len(got) != len(want) {
|
|
t.Fatalf("invalid fields from composite: %v (want %v)", got, want)
|
|
}
|
|
for _, v := range got {
|
|
if _, ok := want[v]; !ok {
|
|
t.Errorf("invalid field returned from composite: %q", v)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestCompositeTextMapPropagatorInject(t *testing.T) {
|
|
a, b := propagator{"a"}, propagator{"b"}
|
|
|
|
c := make(carrier, 0, 2)
|
|
propagation.NewCompositeTextMapPropagator(a, b).Inject(context.Background(), &c)
|
|
|
|
if got := strings.Join([]string(c), ","); got != "a,b" {
|
|
t.Errorf("invalid inject order: %s", got)
|
|
}
|
|
}
|
|
|
|
func TestCompositeTextMapPropagatorExtract(t *testing.T) {
|
|
a, b := propagator{"a"}, propagator{"b"}
|
|
|
|
ctx := context.Background()
|
|
ctx = propagation.NewCompositeTextMapPropagator(a, b).Extract(ctx, nil)
|
|
|
|
v := ctx.Value(ctxKey)
|
|
if v == nil {
|
|
t.Fatal("no composite extraction")
|
|
}
|
|
if got := strings.Join(v.([]string), ","); got != "a,b" {
|
|
t.Errorf("invalid extract order: %s", got)
|
|
}
|
|
}
|