| // 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(0, 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[2] |
| 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(0, 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[2] |
| 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) |
| } |
| } |