mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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bb4f7facfb
* Global trace forwarding implementation according to https://github.com/open-telemetry/oteps/pull/74
76 lines
2.2 KiB
Go
76 lines
2.2 KiB
Go
package internal_test
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import (
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"context"
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"testing"
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"github.com/stretchr/testify/require"
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"go.opentelemetry.io/otel/api/global"
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"go.opentelemetry.io/otel/api/global/internal"
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export "go.opentelemetry.io/otel/sdk/export/trace"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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)
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type testSpanProcesor struct {
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// Names of Spans started.
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spansStarted []string
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// Names of Spans ended.
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spansEnded []string
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}
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func (t *testSpanProcesor) OnStart(s *export.SpanData) {
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t.spansStarted = append(t.spansStarted, s.Name)
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}
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func (t *testSpanProcesor) OnEnd(s *export.SpanData) {
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t.spansEnded = append(t.spansEnded, s.Name)
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}
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func (t *testSpanProcesor) Shutdown() {}
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func TestTraceDefaultSDK(t *testing.T) {
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internal.ResetForTest()
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ctx := context.Background()
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gtp := global.TraceProvider()
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tracer1 := gtp.Tracer("pre")
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_, span1 := tracer1.Start(ctx, "span1")
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// This should be dropped.
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if err := tracer1.WithSpan(ctx, "withSpan1", func(context.Context) error { return nil }); err != nil {
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t.Errorf("failed to wrap function with span prior to initialization: %v", err)
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}
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tp, err := sdktrace.NewProvider(sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}))
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if err != nil {
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t.Fatal(err)
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}
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tsp := &testSpanProcesor{}
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tp.RegisterSpanProcessor(tsp)
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global.SetTraceProvider(tp)
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// This span was started before initialization, it is expected to be dropped.
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span1.End()
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// The existing Tracer should have been configured to now use the configured SDK.
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_, span2 := tracer1.Start(ctx, "span2")
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span2.End()
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if err := tracer1.WithSpan(ctx, "withSpan2", func(context.Context) error { return nil }); err != nil {
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t.Errorf("failed to wrap function with span post initialization: %v", err)
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}
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// The global trace Provider should now create Tracers that also use the newly configured SDK.
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tracer2 := gtp.Tracer("post")
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_, span3 := tracer2.Start(ctx, "span3")
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span3.End()
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if err := tracer2.WithSpan(ctx, "withSpan3", func(context.Context) error { return nil }); err != nil {
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t.Errorf("failed to wrap function with span post initialization with new tracer: %v", err)
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}
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expected := []string{"pre/span2", "pre/withSpan2", "post/span3", "post/withSpan3"}
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require.Equal(t, tsp.spansStarted, expected)
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require.Equal(t, tsp.spansEnded, expected)
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}
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