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trace_test.go
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trace_test.go
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package trace
import (
"context"
"errors"
"fmt"
"math"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
"go.opentelemetry.io/otel/oteltest"
"go.opentelemetry.io/otel/trace"
"github.com/google/go-cmp/cmp"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
ottest "go.opentelemetry.io/otel/internal/internaltest"
export "go.opentelemetry.io/otel/sdk/export/trace"
"go.opentelemetry.io/otel/sdk/instrumentation"
"go.opentelemetry.io/otel/sdk/resource"
)
type storingHandler struct {
errs []error
}
func (s *storingHandler) Handle(err error) {
s.errs = append(s.errs, err)
}
func (s *storingHandler) Reset() {
s.errs = nil
}
var (
tid trace.TraceID
sid trace.SpanID
handler *storingHandler = &storingHandler{}
k1, k2, k3 attribute.Key
kv1, kv2, kv3 attribute.KeyValue
)
func init() {
tid, _ = trace.TraceIDFromHex("01020304050607080102040810203040")
sid, _ = trace.SpanIDFromHex("0102040810203040")
k1 = attribute.Key("k1")
kv1 = k1.String("v1")
k2 = attribute.Key("k2")
kv2 = k2.String("v2")
k3 = attribute.Key("k3")
kv3 = k3.String("v3")
otel.SetErrorHandler(handler)
}
func TestTracerFollowsExpectedAPIBehaviour(t *testing.T) {
harness := oteltest.NewHarness(t)
harness.TestTracerProvider(func() trace.TracerProvider {
return NewTracerProvider(WithDefaultSampler(TraceIDRatioBased(0)))
})
tp := NewTracerProvider(WithDefaultSampler(TraceIDRatioBased(0)))
harness.TestTracer(func() trace.Tracer {
return tp.Tracer("")
})
}
type testExporter struct {
mu sync.RWMutex
idx map[string]int
spans []*export.SpanSnapshot
}
func NewTestExporter() *testExporter {
return &testExporter{idx: make(map[string]int)}
}
func (te *testExporter) ExportSpans(_ context.Context, ss []*export.SpanSnapshot) error {
te.mu.Lock()
defer te.mu.Unlock()
i := len(te.spans)
for _, s := range ss {
te.idx[s.Name] = i
te.spans = append(te.spans, s)
i++
}
return nil
}
func (te *testExporter) Spans() []*export.SpanSnapshot {
te.mu.RLock()
defer te.mu.RUnlock()
cp := make([]*export.SpanSnapshot, len(te.spans))
copy(cp, te.spans)
return cp
}
func (te *testExporter) GetSpan(name string) (*export.SpanSnapshot, bool) {
te.mu.RLock()
defer te.mu.RUnlock()
i, ok := te.idx[name]
if !ok {
return nil, false
}
return te.spans[i], true
}
func (te *testExporter) Len() int {
te.mu.RLock()
defer te.mu.RUnlock()
return len(te.spans)
}
func (te *testExporter) Shutdown(context.Context) error {
te.Reset()
return nil
}
func (te *testExporter) Reset() {
te.mu.Lock()
defer te.mu.Unlock()
te.idx = make(map[string]int)
te.spans = te.spans[:0]
}
type testSampler struct {
callCount int
prefix string
t *testing.T
}
func (ts *testSampler) ShouldSample(p SamplingParameters) SamplingResult {
ts.callCount++
ts.t.Logf("called sampler for name %q", p.Name)
decision := Drop
if strings.HasPrefix(p.Name, ts.prefix) {
decision = RecordAndSample
}
return SamplingResult{Decision: decision, Attributes: []attribute.KeyValue{attribute.Int("callCount", ts.callCount)}}
}
func (ts testSampler) Description() string {
return "testSampler"
}
func TestSetName(t *testing.T) {
tp := NewTracerProvider()
type testCase struct {
name string
newName string
}
for idx, tt := range []testCase{
{ // 0
name: "foobar",
newName: "foobaz",
},
{ // 1
name: "foobar",
newName: "barbaz",
},
{ // 2
name: "barbar",
newName: "barbaz",
},
{ // 3
name: "barbar",
newName: "foobar",
},
} {
sp := startNamedSpan(tp, "SetName", tt.name)
if sdkspan, ok := sp.(*span); ok {
if sdkspan.Name() != tt.name {
t.Errorf("%d: invalid name at span creation, expected %v, got %v", idx, tt.name, sdkspan.Name())
}
} else {
t.Errorf("%d: unable to coerce span to SDK span, is type %T", idx, sp)
}
sp.SetName(tt.newName)
if sdkspan, ok := sp.(*span); ok {
if sdkspan.Name() != tt.newName {
t.Errorf("%d: span name not changed, expected %v, got %v", idx, tt.newName, sdkspan.Name())
}
} else {
t.Errorf("%d: unable to coerce span to SDK span, is type %T", idx, sp)
}
sp.End()
}
}
func TestRecordingIsOn(t *testing.T) {
tp := NewTracerProvider()
_, span := tp.Tracer("Recording on").Start(context.Background(), "StartSpan")
defer span.End()
if span.IsRecording() == false {
t.Error("new span is not recording events")
}
}
func TestSampling(t *testing.T) {
idg := defaultIDGenerator()
const total = 10000
for name, tc := range map[string]struct {
sampler Sampler
expect float64
parent bool
sampledParent bool
}{
// Span w/o a parent
"NeverSample": {sampler: NeverSample(), expect: 0},
"AlwaysSample": {sampler: AlwaysSample(), expect: 1.0},
"TraceIdRatioBased_-1": {sampler: TraceIDRatioBased(-1.0), expect: 0},
"TraceIdRatioBased_.25": {sampler: TraceIDRatioBased(0.25), expect: .25},
"TraceIdRatioBased_.50": {sampler: TraceIDRatioBased(0.50), expect: .5},
"TraceIdRatioBased_.75": {sampler: TraceIDRatioBased(0.75), expect: .75},
"TraceIdRatioBased_2.0": {sampler: TraceIDRatioBased(2.0), expect: 1},
// Spans w/o a parent and using ParentBased(DelegateSampler()) Sampler, receive DelegateSampler's sampling decision
"ParentNeverSample": {sampler: ParentBased(NeverSample()), expect: 0},
"ParentAlwaysSample": {sampler: ParentBased(AlwaysSample()), expect: 1},
"ParentTraceIdRatioBased_.50": {sampler: ParentBased(TraceIDRatioBased(0.50)), expect: .5},
// An unadorned TraceIDRatioBased sampler ignores parent spans
"UnsampledParentSpanWithTraceIdRatioBased_.25": {sampler: TraceIDRatioBased(0.25), expect: .25, parent: true},
"SampledParentSpanWithTraceIdRatioBased_.25": {sampler: TraceIDRatioBased(0.25), expect: .25, parent: true, sampledParent: true},
"UnsampledParentSpanWithTraceIdRatioBased_.50": {sampler: TraceIDRatioBased(0.50), expect: .5, parent: true},
"SampledParentSpanWithTraceIdRatioBased_.50": {sampler: TraceIDRatioBased(0.50), expect: .5, parent: true, sampledParent: true},
"UnsampledParentSpanWithTraceIdRatioBased_.75": {sampler: TraceIDRatioBased(0.75), expect: .75, parent: true},
"SampledParentSpanWithTraceIdRatioBased_.75": {sampler: TraceIDRatioBased(0.75), expect: .75, parent: true, sampledParent: true},
// Spans with a sampled parent but using NeverSample Sampler, are not sampled
"SampledParentSpanWithNeverSample": {sampler: NeverSample(), expect: 0, parent: true, sampledParent: true},
// Spans with a sampled parent and using ParentBased(DelegateSampler()) Sampler, inherit the parent span's sampling status
"SampledParentSpanWithParentNeverSample": {sampler: ParentBased(NeverSample()), expect: 1, parent: true, sampledParent: true},
"UnsampledParentSpanWithParentNeverSampler": {sampler: ParentBased(NeverSample()), expect: 0, parent: true, sampledParent: false},
"SampledParentSpanWithParentAlwaysSampler": {sampler: ParentBased(AlwaysSample()), expect: 1, parent: true, sampledParent: true},
"UnsampledParentSpanWithParentAlwaysSampler": {sampler: ParentBased(AlwaysSample()), expect: 0, parent: true, sampledParent: false},
"SampledParentSpanWithParentTraceIdRatioBased_.50": {sampler: ParentBased(TraceIDRatioBased(0.50)), expect: 1, parent: true, sampledParent: true},
"UnsampledParentSpanWithParentTraceIdRatioBased_.50": {sampler: ParentBased(TraceIDRatioBased(0.50)), expect: 0, parent: true, sampledParent: false},
} {
tc := tc
t.Run(name, func(t *testing.T) {
t.Parallel()
p := NewTracerProvider(WithDefaultSampler(tc.sampler))
tr := p.Tracer("test")
var sampled int
for i := 0; i < total; i++ {
ctx := context.Background()
if tc.parent {
tid, sid := idg.NewIDs(ctx)
psc := trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
SpanID: sid,
})
if tc.sampledParent {
psc = psc.WithTraceFlags(trace.FlagsSampled)
}
ctx = trace.ContextWithRemoteSpanContext(ctx, psc)
}
_, span := tr.Start(ctx, "test")
if span.SpanContext().IsSampled() {
sampled++
}
}
tolerance := 0.0
got := float64(sampled) / float64(total)
if tc.expect > 0 && tc.expect < 1 {
// See https://en.wikipedia.org/wiki/Binomial_proportion_confidence_interval
const z = 4.75342 // This should succeed 99.9999% of the time
tolerance = z * math.Sqrt(got*(1-got)/total)
}
diff := math.Abs(got - tc.expect)
if diff > tolerance {
t.Errorf("got %f (diff: %f), expected %f (w/tolerance: %f)", got, diff, tc.expect, tolerance)
}
})
}
}
func TestStartSpanWithParent(t *testing.T) {
tp := NewTracerProvider()
tr := tp.Tracer("SpanWithParent")
ctx := context.Background()
sc1 := trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
SpanID: sid,
TraceFlags: 0x1,
})
_, s1 := tr.Start(trace.ContextWithRemoteSpanContext(ctx, sc1), "span1-unsampled-parent1")
if err := checkChild(t, sc1, s1); err != nil {
t.Error(err)
}
_, s2 := tr.Start(trace.ContextWithRemoteSpanContext(ctx, sc1), "span2-unsampled-parent1")
if err := checkChild(t, sc1, s2); err != nil {
t.Error(err)
}
ts, err := trace.TraceStateFromKeyValues(attribute.String("k", "v"))
if err != nil {
t.Error(err)
}
sc2 := trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
SpanID: sid,
TraceFlags: 0x1,
TraceState: ts,
})
_, s3 := tr.Start(trace.ContextWithRemoteSpanContext(ctx, sc2), "span3-sampled-parent2")
if err := checkChild(t, sc2, s3); err != nil {
t.Error(err)
}
ctx2, s4 := tr.Start(trace.ContextWithRemoteSpanContext(ctx, sc2), "span4-sampled-parent2")
if err := checkChild(t, sc2, s4); err != nil {
t.Error(err)
}
s4Sc := s4.SpanContext()
_, s5 := tr.Start(ctx2, "span5-implicit-childof-span4")
if err := checkChild(t, s4Sc, s5); err != nil {
t.Error(err)
}
}
func TestSetSpanAttributesOnStart(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp,
"StartSpanAttribute",
trace.WithAttributes(attribute.String("key1", "value1")),
trace.WithAttributes(attribute.String("key2", "value2")),
)
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
Attributes: []attribute.KeyValue{
attribute.String("key1", "value1"),
attribute.String("key2", "value2"),
},
SpanKind: trace.SpanKindInternal,
HasRemoteParent: true,
InstrumentationLibrary: instrumentation.Library{Name: "StartSpanAttribute"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("SetSpanAttributesOnStart: -got +want %s", diff)
}
}
func TestSetSpanAttributes(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp, "SpanAttribute")
span.SetAttributes(attribute.String("key1", "value1"))
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
Attributes: []attribute.KeyValue{
attribute.String("key1", "value1"),
},
SpanKind: trace.SpanKindInternal,
HasRemoteParent: true,
InstrumentationLibrary: instrumentation.Library{Name: "SpanAttribute"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("SetSpanAttributes: -got +want %s", diff)
}
}
// Test that the sampler is called for local child spans. This is verified by checking
// that the attributes set in the sampler are set on the child span.
func TestSamplerAttributesLocalChildSpan(t *testing.T) {
sampler := &testSampler{prefix: "span", t: t}
te := NewTestExporter()
tp := NewTracerProvider(WithDefaultSampler(sampler), WithSyncer(te), WithResource(resource.Empty()))
ctx := context.Background()
ctx, span := startLocalSpan(tp, ctx, "SpanOne", "span0")
_, spanTwo := startLocalSpan(tp, ctx, "SpanTwo", "span1")
spanTwo.End()
span.End()
got := te.Spans()
// endSpan expects only a single span in the test exporter, so manually clear the
// fields that can't be tested for easily (times, span and trace ids).
pid := got[0].SpanContext.SpanID()
got[0].SpanContext = got[0].SpanContext.WithTraceID(tid)
got[0].ParentSpanID = sid
checkTime(&got[0].StartTime)
checkTime(&got[0].EndTime)
got[1].SpanContext = got[1].SpanContext.WithSpanID(trace.SpanID{})
got[1].SpanContext = got[1].SpanContext.WithTraceID(tid)
got[1].ParentSpanID = pid
got[0].SpanContext = got[0].SpanContext.WithSpanID(trace.SpanID{})
checkTime(&got[1].StartTime)
checkTime(&got[1].EndTime)
want := []*export.SpanSnapshot{
{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span1",
Attributes: []attribute.KeyValue{attribute.Int("callCount", 2)},
SpanKind: trace.SpanKindInternal,
HasRemoteParent: false,
InstrumentationLibrary: instrumentation.Library{Name: "SpanTwo"},
},
{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: pid,
Name: "span0",
Attributes: []attribute.KeyValue{attribute.Int("callCount", 1)},
SpanKind: trace.SpanKindInternal,
HasRemoteParent: false,
ChildSpanCount: 1,
InstrumentationLibrary: instrumentation.Library{Name: "SpanOne"},
},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("SetSpanAttributesLocalChildSpan: -got +want %s", diff)
}
}
func TestSetSpanAttributesOverLimit(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSpanLimits(SpanLimits{AttributeCountLimit: 2}), WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp, "SpanAttributesOverLimit")
span.SetAttributes(
attribute.Bool("key1", true),
attribute.String("key2", "value2"),
attribute.Bool("key1", false), // Replace key1.
attribute.Int64("key4", 4), // Remove key2 and add key4
)
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
Attributes: []attribute.KeyValue{
attribute.Bool("key1", false),
attribute.Int64("key4", 4),
},
SpanKind: trace.SpanKindInternal,
HasRemoteParent: true,
DroppedAttributeCount: 1,
InstrumentationLibrary: instrumentation.Library{Name: "SpanAttributesOverLimit"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("SetSpanAttributesOverLimit: -got +want %s", diff)
}
}
func TestSetSpanAttributesWithInvalidKey(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSpanLimits(SpanLimits{}), WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp, "SpanToSetInvalidKeyOrValue")
span.SetAttributes(
attribute.Bool("", true),
attribute.Bool("key1", false),
)
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
Attributes: []attribute.KeyValue{
attribute.Bool("key1", false),
},
SpanKind: trace.SpanKindInternal,
HasRemoteParent: true,
DroppedAttributeCount: 0,
InstrumentationLibrary: instrumentation.Library{Name: "SpanToSetInvalidKeyOrValue"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("SetSpanAttributesWithInvalidKey: -got +want %s", diff)
}
}
func TestEvents(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp, "Events")
k1v1 := attribute.String("key1", "value1")
k2v2 := attribute.Bool("key2", true)
k3v3 := attribute.Int64("key3", 3)
span.AddEvent("foo", trace.WithAttributes(attribute.String("key1", "value1")))
span.AddEvent("bar", trace.WithAttributes(
attribute.Bool("key2", true),
attribute.Int64("key3", 3),
))
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
for i := range got.MessageEvents {
if !checkTime(&got.MessageEvents[i].Time) {
t.Error("exporting span: expected nonzero Event Time")
}
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
HasRemoteParent: true,
MessageEvents: []trace.Event{
{Name: "foo", Attributes: []attribute.KeyValue{k1v1}},
{Name: "bar", Attributes: []attribute.KeyValue{k2v2, k3v3}},
},
SpanKind: trace.SpanKindInternal,
InstrumentationLibrary: instrumentation.Library{Name: "Events"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("Message Events: -got +want %s", diff)
}
}
func TestEventsOverLimit(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSpanLimits(SpanLimits{EventCountLimit: 2}), WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp, "EventsOverLimit")
k1v1 := attribute.String("key1", "value1")
k2v2 := attribute.Bool("key2", false)
k3v3 := attribute.String("key3", "value3")
span.AddEvent("fooDrop", trace.WithAttributes(attribute.String("key1", "value1")))
span.AddEvent("barDrop", trace.WithAttributes(
attribute.Bool("key2", true),
attribute.String("key3", "value3"),
))
span.AddEvent("foo", trace.WithAttributes(attribute.String("key1", "value1")))
span.AddEvent("bar", trace.WithAttributes(
attribute.Bool("key2", false),
attribute.String("key3", "value3"),
))
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
for i := range got.MessageEvents {
if !checkTime(&got.MessageEvents[i].Time) {
t.Error("exporting span: expected nonzero Event Time")
}
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
MessageEvents: []trace.Event{
{Name: "foo", Attributes: []attribute.KeyValue{k1v1}},
{Name: "bar", Attributes: []attribute.KeyValue{k2v2, k3v3}},
},
DroppedMessageEventCount: 2,
HasRemoteParent: true,
SpanKind: trace.SpanKindInternal,
InstrumentationLibrary: instrumentation.Library{Name: "EventsOverLimit"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("Message Event over limit: -got +want %s", diff)
}
}
func TestLinks(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSyncer(te), WithResource(resource.Empty()))
k1v1 := attribute.String("key1", "value1")
k2v2 := attribute.String("key2", "value2")
k3v3 := attribute.String("key3", "value3")
sc1 := trace.NewSpanContext(trace.SpanContextConfig{TraceID: trace.TraceID([16]byte{1, 1}), SpanID: trace.SpanID{3}})
sc2 := trace.NewSpanContext(trace.SpanContextConfig{TraceID: trace.TraceID([16]byte{1, 1}), SpanID: trace.SpanID{3}})
links := []trace.Link{
{SpanContext: sc1, Attributes: []attribute.KeyValue{k1v1}},
{SpanContext: sc2, Attributes: []attribute.KeyValue{k2v2, k3v3}},
}
span := startSpan(tp, "Links", trace.WithLinks(links...))
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
HasRemoteParent: true,
Links: links,
SpanKind: trace.SpanKindInternal,
InstrumentationLibrary: instrumentation.Library{Name: "Links"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("Link: -got +want %s", diff)
}
}
func TestLinksOverLimit(t *testing.T) {
te := NewTestExporter()
sc1 := trace.NewSpanContext(trace.SpanContextConfig{TraceID: trace.TraceID([16]byte{1, 1}), SpanID: trace.SpanID{3}})
sc2 := trace.NewSpanContext(trace.SpanContextConfig{TraceID: trace.TraceID([16]byte{1, 1}), SpanID: trace.SpanID{3}})
sc3 := trace.NewSpanContext(trace.SpanContextConfig{TraceID: trace.TraceID([16]byte{1, 1}), SpanID: trace.SpanID{3}})
tp := NewTracerProvider(WithSpanLimits(SpanLimits{LinkCountLimit: 2}), WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp, "LinksOverLimit",
trace.WithLinks(
trace.Link{SpanContext: sc1, Attributes: []attribute.KeyValue{attribute.String("key1", "value1")}},
trace.Link{SpanContext: sc2, Attributes: []attribute.KeyValue{attribute.String("key2", "value2")}},
trace.Link{SpanContext: sc3, Attributes: []attribute.KeyValue{attribute.String("key3", "value3")}},
),
)
k2v2 := attribute.String("key2", "value2")
k3v3 := attribute.String("key3", "value3")
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
Links: []trace.Link{
{SpanContext: sc2, Attributes: []attribute.KeyValue{k2v2}},
{SpanContext: sc3, Attributes: []attribute.KeyValue{k3v3}},
},
DroppedLinkCount: 1,
HasRemoteParent: true,
SpanKind: trace.SpanKindInternal,
InstrumentationLibrary: instrumentation.Library{Name: "LinksOverLimit"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("Link over limit: -got +want %s", diff)
}
}
func TestSetSpanName(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSyncer(te), WithResource(resource.Empty()))
ctx := context.Background()
want := "SpanName-1"
ctx = trace.ContextWithRemoteSpanContext(ctx, trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
SpanID: sid,
TraceFlags: 1,
}))
_, span := tp.Tracer("SetSpanName").Start(ctx, "SpanName-1")
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
if got.Name != want {
t.Errorf("span.Name: got %q; want %q", got.Name, want)
}
}
func TestSetSpanStatus(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp, "SpanStatus")
span.SetStatus(codes.Error, "Error")
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
SpanKind: trace.SpanKindInternal,
StatusCode: codes.Error,
StatusMessage: "Error",
HasRemoteParent: true,
InstrumentationLibrary: instrumentation.Library{Name: "SpanStatus"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("SetSpanStatus: -got +want %s", diff)
}
}
func TestSetSpanStatusWithoutMessageWhenStatusIsNotError(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSyncer(te), WithResource(resource.Empty()))
span := startSpan(tp, "SpanStatus")
span.SetStatus(codes.Ok, "This message will be ignored")
got, err := endSpan(te, span)
if err != nil {
t.Fatal(err)
}
want := &export.SpanSnapshot{
SpanContext: trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
TraceFlags: 0x1,
}),
ParentSpanID: sid,
Name: "span0",
SpanKind: trace.SpanKindInternal,
StatusCode: codes.Ok,
StatusMessage: "",
HasRemoteParent: true,
InstrumentationLibrary: instrumentation.Library{Name: "SpanStatus"},
}
if diff := cmpDiff(got, want); diff != "" {
t.Errorf("SetSpanStatus: -got +want %s", diff)
}
}
func cmpDiff(x, y interface{}) string {
return cmp.Diff(x, y,
cmp.AllowUnexported(attribute.Value{}),
cmp.AllowUnexported(trace.Event{}),
cmp.AllowUnexported(trace.TraceState{}))
}
func remoteSpanContext() trace.SpanContext {
return trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
SpanID: sid,
TraceFlags: 1,
})
}
// checkChild is test utility function that tests that c has fields set appropriately,
// given that it is a child span of p.
func checkChild(t *testing.T, p trace.SpanContext, apiSpan trace.Span) error {
s := apiSpan.(*span)
if s == nil {
return fmt.Errorf("got nil child span, want non-nil")
}
if got, want := s.spanContext.TraceID().String(), p.TraceID().String(); got != want {
return fmt.Errorf("got child trace ID %s, want %s", got, want)
}
if childID, parentID := s.spanContext.SpanID().String(), p.SpanID().String(); childID == parentID {
return fmt.Errorf("got child span ID %s, parent span ID %s; want unequal IDs", childID, parentID)
}
if got, want := s.spanContext.TraceFlags(), p.TraceFlags(); got != want {
return fmt.Errorf("got child trace options %d, want %d", got, want)
}
got, want := s.spanContext.TraceState(), p.TraceState()
assert.Equal(t, want, got)
return nil
}
// startSpan starts a span with a name "span0". See startNamedSpan for
// details.
func startSpan(tp *TracerProvider, trName string, args ...trace.SpanOption) trace.Span {
return startNamedSpan(tp, trName, "span0", args...)
}
// startNamed Span is a test utility func that starts a span with a
// passed name and with remote span context as parent. The remote span
// context contains TraceFlags with sampled bit set. This allows the
// span to be automatically sampled.
func startNamedSpan(tp *TracerProvider, trName, name string, args ...trace.SpanOption) trace.Span {
ctx := context.Background()
ctx = trace.ContextWithRemoteSpanContext(ctx, remoteSpanContext())
_, span := tp.Tracer(trName).Start(
ctx,
name,
args...,
)
return span
}
// startLocalSpan is a test utility func that starts a span with a
// passed name and with the passed context. The context is returned
// along with the span so this parent can be used to create child
// spans.
func startLocalSpan(tp *TracerProvider, ctx context.Context, trName, name string, args ...trace.SpanOption) (context.Context, trace.Span) {
ctx, span := tp.Tracer(trName).Start(
ctx,
name,
args...,
)
return ctx, span
}
// endSpan is a test utility function that ends the span in the context and
// returns the exported export.SpanSnapshot.
// It requires that span be sampled using one of these methods
// 1. Passing parent span context in context
// 2. Use WithSampler(AlwaysSample())
// 3. Configuring AlwaysSample() as default sampler
//
// It also does some basic tests on the span.
// It also clears spanID in the export.SpanSnapshot to make the comparison
// easier.
func endSpan(te *testExporter, span trace.Span) (*export.SpanSnapshot, error) {
if !span.IsRecording() {
return nil, fmt.Errorf("IsRecording: got false, want true")
}
if !span.SpanContext().IsSampled() {
return nil, fmt.Errorf("IsSampled: got false, want true")
}
span.End()
if te.Len() != 1 {
return nil, fmt.Errorf("got %d exported spans, want one span", te.Len())
}
got := te.Spans()[0]
if !got.SpanContext.SpanID().IsValid() {
return nil, fmt.Errorf("exporting span: expected nonzero SpanID")
}
got.SpanContext = got.SpanContext.WithSpanID(trace.SpanID{})
if !checkTime(&got.StartTime) {
return nil, fmt.Errorf("exporting span: expected nonzero StartTime")
}
if !checkTime(&got.EndTime) {
return nil, fmt.Errorf("exporting span: expected nonzero EndTime")
}
return got, nil
}
// checkTime checks that a nonzero time was set in x, then clears it.
func checkTime(x *time.Time) bool {
if x.IsZero() {
return false
}
*x = time.Time{}
return true
}
func TestEndSpanTwice(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithSyncer(te))
st := time.Now()
et1 := st.Add(100 * time.Millisecond)
et2 := st.Add(200 * time.Millisecond)
span := startSpan(tp, "EndSpanTwice", trace.WithTimestamp(st))
span.End(trace.WithTimestamp(et1))
span.End(trace.WithTimestamp(et2))
if te.Len() != 1 {
t.Fatalf("expected only a single span, got %#v", te.Spans())
}
ro := span.(ReadOnlySpan)
if ro.EndTime() != et1 {
t.Fatalf("2nd call to End() should not modify end time")
}
}
func TestStartSpanAfterEnd(t *testing.T) {
te := NewTestExporter()
tp := NewTracerProvider(WithDefaultSampler(AlwaysSample()), WithSyncer(te))
ctx := context.Background()
tr := tp.Tracer("SpanAfterEnd")
ctx, span0 := tr.Start(trace.ContextWithRemoteSpanContext(ctx, remoteSpanContext()), "parent")
ctx1, span1 := tr.Start(ctx, "span-1")
span1.End()
// Start a new span with the context containing span-1
// even though span-1 is ended, we still add this as a new child of span-1
_, span2 := tr.Start(ctx1, "span-2")
span2.End()
span0.End()
if got, want := te.Len(), 3; got != want {
t.Fatalf("len(%#v) = %d; want %d", te.Spans(), got, want)
}
gotParent, ok := te.GetSpan("parent")
if !ok {
t.Fatal("parent not recorded")
}
gotSpan1, ok := te.GetSpan("span-1")
if !ok {
t.Fatal("span-1 not recorded")
}
gotSpan2, ok := te.GetSpan("span-2")
if !ok {
t.Fatal("span-2 not recorded")
}
if got, want := gotSpan1.SpanContext.TraceID(), gotParent.SpanContext.TraceID(); got != want {
t.Errorf("span-1.TraceID=%q; want %q", got, want)
}
if got, want := gotSpan2.SpanContext.TraceID(), gotParent.SpanContext.TraceID(); got != want {
t.Errorf("span-2.TraceID=%q; want %q", got, want)
}
if got, want := gotSpan1.ParentSpanID, gotParent.SpanContext.SpanID(); got != want {
t.Errorf("span-1.ParentSpanID=%q; want %q (parent.SpanID)", got, want)
}
if got, want := gotSpan2.ParentSpanID, gotSpan1.SpanContext.SpanID(); got != want {
t.Errorf("span-2.ParentSpanID=%q; want %q (span1.SpanID)", got, want)
}
}
func TestChildSpanCount(t *testing.T) {
te := NewTestExporter()