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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package autoprop
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/propagation"
)
type handler struct {
err error
}
func (h *handler) Handle(err error) { h.err = err }
func TestNewTextMapPropagatorInvalidEnvVal(t *testing.T) {
h := &handler{}
otel.SetErrorHandler(h)
const name = "invalid-name"
t.Setenv(otelPropagatorsEnvKey, name)
_ = NewTextMapPropagator()
assert.ErrorIs(t, h.err, errUnknownPropagator)
}
func TestNewTextMapPropagatorDefault(t *testing.T) {
expect := []string{"traceparent", "tracestate", "baggage"}
assert.ElementsMatch(t, expect, NewTextMapPropagator().Fields())
}
type ptrNoop struct{}
func (*ptrNoop) Inject(context.Context, propagation.TextMapCarrier) {}
func (*ptrNoop) Extract(context.Context, propagation.TextMapCarrier) context.Context {
return context.Background()
}
func (*ptrNoop) Fields() []string {
return nil
}
func TestNewTextMapPropagatorSingleNoOverhead(t *testing.T) {
p := &ptrNoop{}
assert.Same(t, p, NewTextMapPropagator(p))
}
func TestNewTextMapPropagatorMultiEnvNone(t *testing.T) {
t.Setenv(otelPropagatorsEnvKey, "b3,none,tracecontext")
assert.Equal(t, noop, NewTextMapPropagator())
}
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