mirror of
https://github.com/ethereum/go-ethereum.git
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98 lines
3.1 KiB
Go
98 lines
3.1 KiB
Go
// Copyright 2026 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package telemetry
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import (
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"context"
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"testing"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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"go.opentelemetry.io/otel/sdk/trace/tracetest"
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"go.opentelemetry.io/otel/trace"
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)
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// newTestTracer creates a TracerProvider backed by an in-memory exporter.
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func newTestTracer(t *testing.T) (trace.Tracer, *sdktrace.TracerProvider, *tracetest.InMemoryExporter) {
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t.Helper()
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exporter := tracetest.NewInMemoryExporter()
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tp := sdktrace.NewTracerProvider(sdktrace.WithSyncer(exporter))
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t.Cleanup(func() { _ = tp.Shutdown(context.Background()) })
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return tp.Tracer("test"), tp, exporter
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}
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func TestStartSpanWithTracer_NoParent(t *testing.T) {
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t.Parallel()
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tracer, tp, exporter := newTestTracer(t)
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// Create a span without a parent.
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ctx := context.Background()
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retCtx, _, endSpan := StartSpanWithTracer(ctx, tracer, "should-not-exist")
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endSpan(nil)
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// The returned context should be the original context (unchanged).
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if retCtx != ctx {
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t.Fatal("expected original context to be returned unchanged")
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}
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// Flush and verify no spans were recorded.
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if err := tp.ForceFlush(context.Background()); err != nil {
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t.Fatalf("failed to flush: %v", err)
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}
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spans := exporter.GetSpans()
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if len(spans) != 0 {
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t.Fatalf("expected no spans, got %d", len(spans))
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}
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}
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func TestStartSpanWithTracer_WithParent(t *testing.T) {
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t.Parallel()
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tracer, tp, exporter := newTestTracer(t)
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// Create a parent span to establish a valid span context.
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ctx, parentSpan := tracer.Start(context.Background(), "parent")
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defer parentSpan.End()
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// Should create a real child span.
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_, _, endSpan := StartSpanWithTracer(ctx, tracer, "child")
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endSpan(nil)
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// Flush and verify the child span was recorded.
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parentSpan.End()
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if err := tp.ForceFlush(context.Background()); err != nil {
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t.Fatalf("failed to flush: %v", err)
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}
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spans := exporter.GetSpans()
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var childSpan *tracetest.SpanStub
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for i := range spans {
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if spans[i].Name == "child" {
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childSpan = &spans[i]
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break
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}
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}
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if childSpan == nil {
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t.Fatal("child span not found")
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}
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// Verify it is parented to the correct trace.
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if childSpan.Parent.TraceID() != parentSpan.SpanContext().TraceID() {
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t.Errorf("trace ID mismatch: got %s, want %s",
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childSpan.Parent.TraceID(), parentSpan.SpanContext().TraceID())
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}
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if childSpan.SpanKind != trace.SpanKindInternal {
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t.Errorf("expected SpanKindInternal, got %v", childSpan.SpanKind)
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}
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}
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