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54 lines
1.6 KiB
Go
54 lines
1.6 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 internal_test
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import (
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"context"
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"testing"
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"go.opentelemetry.io/otel/api/global/internal"
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"go.opentelemetry.io/otel/oteltest"
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)
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func TestTextMapPropagatorDelegation(t *testing.T) {
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internal.ResetForTest()
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ctx := context.Background()
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carrier := oteltest.NewTextMapCarrier(nil)
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// The default should be a noop.
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prior := internal.TextMapPropagator()
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prior.Inject(ctx, carrier)
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ctx = prior.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 := oteltest.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 prior propagator should use the delegate after it is set as the
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// global.
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internal.SetTextMapPropagator(delegate)
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prior.Inject(ctx, carrier)
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ctx = prior.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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