mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-14 10:13:10 +02:00
288 lines
8.4 KiB
Go
288 lines
8.4 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metric_test
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import (
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"context"
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"errors"
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"fmt"
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"testing"
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"go.opentelemetry.io/otel/api/core"
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"go.opentelemetry.io/otel/api/key"
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"go.opentelemetry.io/otel/api/metric"
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"go.opentelemetry.io/otel/api/unit"
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mockTest "go.opentelemetry.io/otel/internal/metric"
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"github.com/google/go-cmp/cmp"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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var Must = metric.Must
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func TestOptions(t *testing.T) {
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type testcase struct {
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name string
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opts []metric.Option
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desc string
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unit unit.Unit
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}
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testcases := []testcase{
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{
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name: "no opts",
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opts: nil,
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desc: "",
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unit: "",
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},
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{
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name: "description",
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opts: []metric.Option{
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metric.WithDescription("stuff"),
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},
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desc: "stuff",
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unit: "",
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},
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{
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name: "description override",
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opts: []metric.Option{
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metric.WithDescription("stuff"),
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metric.WithDescription("things"),
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},
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desc: "things",
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unit: "",
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},
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{
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name: "unit",
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opts: []metric.Option{
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metric.WithUnit("s"),
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},
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desc: "",
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unit: "s",
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},
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{
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name: "unit override",
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opts: []metric.Option{
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metric.WithUnit("s"),
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metric.WithUnit("h"),
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},
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desc: "",
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unit: "h",
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},
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}
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for idx, tt := range testcases {
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t.Logf("Testing counter case %s (%d)", tt.name, idx)
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if diff := cmp.Diff(metric.Configure(tt.opts), metric.Config{
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Description: tt.desc,
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Unit: tt.unit,
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}); diff != "" {
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t.Errorf("Compare options: -got +want %s", diff)
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}
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}
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}
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func TestCounter(t *testing.T) {
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{
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mockSDK, meter := mockTest.NewMeter()
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c := Must(meter).NewFloat64Counter("test.counter.float")
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ctx := context.Background()
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labels := []core.KeyValue{key.String("A", "B")}
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c.Add(ctx, 42, labels...)
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boundInstrument := c.Bind(labels...)
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boundInstrument.Add(ctx, 42)
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meter.RecordBatch(ctx, labels, c.Measurement(42))
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t.Log("Testing float counter")
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checkBatches(t, ctx, labels, mockSDK, metric.Float64NumberKind, c.SyncImpl())
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}
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{
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mockSDK, meter := mockTest.NewMeter()
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c := Must(meter).NewInt64Counter("test.counter.int")
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ctx := context.Background()
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labels := []core.KeyValue{key.String("A", "B"), key.String("C", "D")}
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c.Add(ctx, 42, labels...)
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boundInstrument := c.Bind(labels...)
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boundInstrument.Add(ctx, 42)
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meter.RecordBatch(ctx, labels, c.Measurement(42))
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t.Log("Testing int counter")
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checkBatches(t, ctx, labels, mockSDK, metric.Int64NumberKind, c.SyncImpl())
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}
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}
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func TestMeasure(t *testing.T) {
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{
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mockSDK, meter := mockTest.NewMeter()
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m := Must(meter).NewFloat64Measure("test.measure.float")
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ctx := context.Background()
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labels := []core.KeyValue{}
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m.Record(ctx, 42, labels...)
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boundInstrument := m.Bind(labels...)
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boundInstrument.Record(ctx, 42)
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meter.RecordBatch(ctx, labels, m.Measurement(42))
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t.Log("Testing float measure")
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checkBatches(t, ctx, labels, mockSDK, metric.Float64NumberKind, m.SyncImpl())
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}
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{
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mockSDK, meter := mockTest.NewMeter()
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m := Must(meter).NewInt64Measure("test.measure.int")
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ctx := context.Background()
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labels := []core.KeyValue{key.Int("I", 1)}
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m.Record(ctx, 42, labels...)
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boundInstrument := m.Bind(labels...)
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boundInstrument.Record(ctx, 42)
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meter.RecordBatch(ctx, labels, m.Measurement(42))
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t.Log("Testing int measure")
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checkBatches(t, ctx, labels, mockSDK, metric.Int64NumberKind, m.SyncImpl())
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}
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}
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func TestObserver(t *testing.T) {
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{
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labels := []core.KeyValue{key.String("O", "P")}
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mockSDK, meter := mockTest.NewMeter()
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o := Must(meter).RegisterFloat64Observer("test.observer.float", func(result metric.Float64ObserverResult) {
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result.Observe(42, labels...)
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})
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t.Log("Testing float observer")
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mockSDK.RunAsyncInstruments()
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checkObserverBatch(t, labels, mockSDK, metric.Float64NumberKind, o.AsyncImpl())
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}
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{
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labels := []core.KeyValue{}
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mockSDK, meter := mockTest.NewMeter()
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o := Must(meter).RegisterInt64Observer("test.observer.int", func(result metric.Int64ObserverResult) {
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result.Observe(42, labels...)
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})
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t.Log("Testing int observer")
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mockSDK.RunAsyncInstruments()
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checkObserverBatch(t, labels, mockSDK, metric.Int64NumberKind, o.AsyncImpl())
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}
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}
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func checkBatches(t *testing.T, ctx context.Context, labels []core.KeyValue, mock *mockTest.MeterImpl, kind metric.NumberKind, instrument metric.InstrumentImpl) {
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t.Helper()
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if len(mock.MeasurementBatches) != 3 {
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t.Errorf("Expected 3 recorded measurement batches, got %d", len(mock.MeasurementBatches))
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}
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ourInstrument := instrument.Implementation().(*mockTest.Sync)
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for i, got := range mock.MeasurementBatches {
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if got.Ctx != ctx {
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d := func(c context.Context) string {
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return fmt.Sprintf("(ptr: %p, ctx %#v)", c, c)
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}
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t.Errorf("Wrong recorded context in batch %d, expected %s, got %s", i, d(ctx), d(got.Ctx))
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}
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if !assert.Equal(t, got.Labels, labels) {
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t.Errorf("Wrong recorded label set in batch %d, expected %v, got %v", i, labels, got.Labels)
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}
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if len(got.Measurements) != 1 {
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t.Errorf("Expected 1 measurement in batch %d, got %d", i, len(got.Measurements))
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}
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minMLen := 1
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if minMLen > len(got.Measurements) {
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minMLen = len(got.Measurements)
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}
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for j := 0; j < minMLen; j++ {
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measurement := got.Measurements[j]
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if measurement.Instrument.Implementation() != ourInstrument {
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d := func(iface interface{}) string {
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i := iface.(*mockTest.Instrument)
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return fmt.Sprintf("(ptr: %p, instrument %#v)", i, i)
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}
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t.Errorf("Wrong recorded instrument in measurement %d in batch %d, expected %s, got %s", j, i, d(ourInstrument), d(measurement.Instrument.Implementation()))
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}
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ft := fortyTwo(t, kind)
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if measurement.Number.CompareNumber(kind, ft) != 0 {
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t.Errorf("Wrong recorded value in measurement %d in batch %d, expected %s, got %s", j, i, ft.Emit(kind), measurement.Number.Emit(kind))
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}
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}
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}
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}
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func checkObserverBatch(t *testing.T, labels []core.KeyValue, mock *mockTest.MeterImpl, kind metric.NumberKind, observer metric.AsyncImpl) {
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t.Helper()
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assert.Len(t, mock.MeasurementBatches, 1)
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if len(mock.MeasurementBatches) < 1 {
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return
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}
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o := observer.Implementation().(*mockTest.Async)
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if !assert.NotNil(t, o) {
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return
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}
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got := mock.MeasurementBatches[0]
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assert.Equal(t, labels, got.Labels)
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assert.Len(t, got.Measurements, 1)
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if len(got.Measurements) < 1 {
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return
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}
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measurement := got.Measurements[0]
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assert.Equal(t, o, measurement.Instrument.Implementation().(*mockTest.Async))
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ft := fortyTwo(t, kind)
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assert.Equal(t, 0, measurement.Number.CompareNumber(kind, ft))
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}
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func fortyTwo(t *testing.T, kind metric.NumberKind) metric.Number {
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t.Helper()
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switch kind {
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case metric.Int64NumberKind:
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return metric.NewInt64Number(42)
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case metric.Float64NumberKind:
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return metric.NewFloat64Number(42)
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}
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t.Errorf("Invalid value kind %q", kind)
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return metric.NewInt64Number(0)
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}
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type testWrappedMeter struct {
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}
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var _ metric.MeterImpl = testWrappedMeter{}
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func (testWrappedMeter) RecordBatch(context.Context, []core.KeyValue, ...metric.Measurement) {
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}
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func (testWrappedMeter) NewSyncInstrument(_ metric.Descriptor) (metric.SyncImpl, error) {
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return nil, nil
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}
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func (testWrappedMeter) NewAsyncInstrument(_ metric.Descriptor, _ func(func(metric.Number, []core.KeyValue))) (metric.AsyncImpl, error) {
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return nil, errors.New("Test wrap error")
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}
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func TestWrappedInstrumentError(t *testing.T) {
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impl := &testWrappedMeter{}
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meter := metric.WrapMeterImpl(impl, "test")
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measure, err := meter.NewInt64Measure("test.measure")
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require.Equal(t, err, metric.ErrSDKReturnedNilImpl)
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require.NotNil(t, measure.SyncImpl())
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observer, err := meter.RegisterInt64Observer("test.observer", func(result metric.Int64ObserverResult) {})
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require.NotNil(t, err)
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require.NotNil(t, observer.AsyncImpl())
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}
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func TestNilCallbackObserverNoop(t *testing.T) {
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// Tests that a nil callback yields a no-op observer without error.
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_, meter := mockTest.NewMeter()
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observer := Must(meter).RegisterInt64Observer("test.observer", nil)
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_, ok := observer.AsyncImpl().(metric.NoopAsync)
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require.True(t, ok)
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}
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