|
- // Copyright 2018, OpenCensus 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_test
-
- import (
- "context"
- "testing"
-
- "go.opencensus.io/stats"
- "go.opencensus.io/stats/view"
- "go.opencensus.io/trace"
- )
-
- func TestTraceExemplar(t *testing.T) {
- m := stats.Float64("measure."+t.Name(), "", stats.UnitDimensionless)
- v := &view.View{
- Measure: m,
- Aggregation: view.Distribution(1, 2, 3),
- }
- view.Register(v)
- ctx := context.Background()
- ctx, span := trace.StartSpan(ctx, t.Name(), trace.WithSampler(trace.AlwaysSample()))
- stats.Record(ctx, m.M(1.5))
- span.End()
-
- rows, err := view.RetrieveData(v.Name)
- if err != nil {
- t.Fatal(err)
- }
- if len(rows) == 0 {
- t.Fatal("len(rows) = 0; want > 0")
- }
- dd := rows[0].Data.(*view.DistributionData)
- if got := len(dd.ExemplarsPerBucket); got < 3 {
- t.Fatalf("len(dd.ExemplarsPerBucket) = %d; want >= 2", got)
- }
- exemplar := dd.ExemplarsPerBucket[1]
- if exemplar == nil {
- t.Fatal("Expected exemplar")
- }
- if got, want := exemplar.Value, 1.5; got != want {
- t.Fatalf("exemplar.Value = %v; got %v", got, want)
- }
- if _, ok := exemplar.Attachments["trace_id"]; !ok {
- t.Fatalf("exemplar.Attachments = %v; want trace_id key", exemplar.Attachments)
- }
- if _, ok := exemplar.Attachments["span_id"]; !ok {
- t.Fatalf("exemplar.Attachments = %v; want span_id key", exemplar.Attachments)
- }
- }
-
- func TestTraceExemplar_notSampled(t *testing.T) {
- m := stats.Float64("measure."+t.Name(), "", stats.UnitDimensionless)
- v := &view.View{
- Measure: m,
- Aggregation: view.Distribution(1, 2, 3),
- }
- view.Register(v)
- ctx := context.Background()
- ctx, span := trace.StartSpan(ctx, t.Name(), trace.WithSampler(trace.NeverSample()))
- stats.Record(ctx, m.M(1.5))
- span.End()
-
- rows, err := view.RetrieveData(v.Name)
- if err != nil {
- t.Fatal(err)
- }
- if len(rows) == 0 {
- t.Fatal("len(rows) = 0; want > 0")
- }
- dd := rows[0].Data.(*view.DistributionData)
- if got := len(dd.ExemplarsPerBucket); got < 3 {
- t.Fatalf("len(buckets) = %d; want >= 2", got)
- }
- exemplar := dd.ExemplarsPerBucket[1]
- if exemplar == nil {
- t.Fatal("Expected exemplar")
- }
- if got, want := exemplar.Value, 1.5; got != want {
- t.Fatalf("exemplar.Value = %v; got %v", got, want)
- }
- if _, ok := exemplar.Attachments["trace_id"]; ok {
- t.Fatalf("exemplar.Attachments = %v; want no trace_id", exemplar.Attachments)
- }
- if _, ok := exemplar.Attachments["span_id"]; ok {
- t.Fatalf("exemplar.Attachments = %v; want span_id key", exemplar.Attachments)
- }
- }
|