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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package trace_test
import (
"context"
"errors"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
)
var (
tid, _ = trace.TraceIDFromHex("01020304050607080102040810203040")
sid, _ = trace.SpanIDFromHex("0102040810203040")
)
type testExporter struct {
spans []sdktrace.ReadOnlySpan
shutdown bool
}
func (t *testExporter) ExportSpans(ctx context.Context, spans []sdktrace.ReadOnlySpan) error {
t.spans = append(t.spans, spans...)
return nil
}
func (t *testExporter) Shutdown(ctx context.Context) error {
t.shutdown = true
select {
case <-ctx.Done():
// Ensure context deadline tests receive the expected error.
return ctx.Err()
default:
return nil
}
}
var _ sdktrace.SpanExporter = (*testExporter)(nil)
func TestNewSimpleSpanProcessor(t *testing.T) {
if ssp := sdktrace.NewSimpleSpanProcessor(&testExporter{}); ssp == nil {
t.Error("failed to create new SimpleSpanProcessor")
}
}
func TestNewSimpleSpanProcessorWithNilExporter(t *testing.T) {
if ssp := sdktrace.NewSimpleSpanProcessor(nil); ssp == nil {
t.Error("failed to create new SimpleSpanProcessor with nil exporter")
}
}
func startSpan(tp trace.TracerProvider) trace.Span {
tr := tp.Tracer("SimpleSpanProcessor")
sc := trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
SpanID: sid,
TraceFlags: 0x1,
})
ctx := trace.ContextWithRemoteSpanContext(context.Background(), sc)
_, span := tr.Start(ctx, "OnEnd")
return span
}
func TestSimpleSpanProcessorOnEnd(t *testing.T) {
tp := basicTracerProvider(t)
te := testExporter{}
ssp := sdktrace.NewSimpleSpanProcessor(&te)
tp.RegisterSpanProcessor(ssp)
startSpan(tp).End()
wantTraceID := tid
gotTraceID := te.spans[0].SpanContext().TraceID()
if wantTraceID != gotTraceID {
t.Errorf("SimplerSpanProcessor OnEnd() check: got %+v, want %+v\n", gotTraceID, wantTraceID)
}
}
func TestSimpleSpanProcessorShutdown(t *testing.T) {
exporter := &testExporter{}
ssp := sdktrace.NewSimpleSpanProcessor(exporter)
// Ensure we can export a span before we test we cannot after shutdown.
tp := basicTracerProvider(t)
tp.RegisterSpanProcessor(ssp)
startSpan(tp).End()
nExported := len(exporter.spans)
if nExported != 1 {
t.Error("failed to verify span export")
}
if err := ssp.Shutdown(context.Background()); err != nil {
t.Errorf("shutting the SimpleSpanProcessor down: %v", err)
}
if !exporter.shutdown {
t.Error("SimpleSpanProcessor.Shutdown did not shut down exporter")
}
startSpan(tp).End()
if len(exporter.spans) > nExported {
t.Error("exported span to shutdown exporter")
}
}
func TestSimpleSpanProcessorShutdownOnEndConcurrentSafe(t *testing.T) {
exporter := &testExporter{}
ssp := sdktrace.NewSimpleSpanProcessor(exporter)
tp := basicTracerProvider(t)
tp.RegisterSpanProcessor(ssp)
stop := make(chan struct{})
done := make(chan struct{})
go func() {
defer func() {
done <- struct{}{}
}()
for {
select {
case <-stop:
return
default:
startSpan(tp).End()
}
}
}()
if err := ssp.Shutdown(context.Background()); err != nil {
t.Errorf("shutting the SimpleSpanProcessor down: %v", err)
}
if !exporter.shutdown {
t.Error("SimpleSpanProcessor.Shutdown did not shut down exporter")
}
stop <- struct{}{}
<-done
}
func TestSimpleSpanProcessorShutdownOnEndConcurrentSafe2(t *testing.T) {
exporter := &testExporter{}
ssp := sdktrace.NewSimpleSpanProcessor(exporter)
tp := basicTracerProvider(t)
tp.RegisterSpanProcessor(ssp)
var wg sync.WaitGroup
wg.Add(2)
span := func(spanName string) {
assert.NotPanics(t, func() {
defer wg.Done()
_, span := tp.Tracer("test").Start(context.Background(), spanName)
span.End()
})
}
go span("test-span-1")
go span("test-span-2")
wg.Wait()
assert.NoError(t, ssp.Shutdown(context.Background()))
assert.True(t, exporter.shutdown, "exporter shutdown")
}
func TestSimpleSpanProcessorShutdownHonorsContextDeadline(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), time.Nanosecond)
defer cancel()
<-ctx.Done()
ssp := sdktrace.NewSimpleSpanProcessor(&testExporter{})
if got, want := ssp.Shutdown(ctx), context.DeadlineExceeded; !errors.Is(got, want) {
t.Errorf("SimpleSpanProcessor.Shutdown did not return %v, got %v", want, got)
}
}
func TestSimpleSpanProcessorShutdownHonorsContextCancel(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
cancel()
ssp := sdktrace.NewSimpleSpanProcessor(&testExporter{})
if got, want := ssp.Shutdown(ctx), context.Canceled; !errors.Is(got, want) {
t.Errorf("SimpleSpanProcessor.Shutdown did not return %v, got %v", want, got)
}
}
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