forked from open-telemetry/opentelemetry-go
/
otlptest.go
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/
otlptest.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 otlpmetrictest // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal/otlpmetrictest"
import (
"context"
"fmt"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/otlp/otlpmetric"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/number"
"go.opentelemetry.io/otel/metric/sdkapi"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
"go.opentelemetry.io/otel/sdk/metric/export/aggregation"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
metricpb "go.opentelemetry.io/proto/otlp/metrics/v1"
)
// RunEndToEndTest can be used by protocol driver tests to validate
// themselves.
func RunEndToEndTest(ctx context.Context, t *testing.T, exp *otlpmetric.Exporter, mcMetrics Collector) {
selector := simple.NewWithInexpensiveDistribution()
proc := processor.NewFactory(selector, aggregation.StatelessTemporalitySelector())
cont := controller.New(proc, controller.WithExporter(exp))
require.NoError(t, cont.Start(ctx))
meter := cont.Meter("test-meter")
labels := []attribute.KeyValue{attribute.Bool("test", true)}
type data struct {
iKind sdkapi.InstrumentKind
nKind number.Kind
val int64
}
instruments := map[string]data{
"test-int64-counter": {sdkapi.CounterInstrumentKind, number.Int64Kind, 1},
"test-float64-counter": {sdkapi.CounterInstrumentKind, number.Float64Kind, 1},
"test-int64-gaugeobserver": {sdkapi.GaugeObserverInstrumentKind, number.Int64Kind, 3},
"test-float64-gaugeobserver": {sdkapi.GaugeObserverInstrumentKind, number.Float64Kind, 3},
}
for name, data := range instruments {
data := data
switch data.iKind {
case sdkapi.CounterInstrumentKind:
switch data.nKind {
case number.Int64Kind:
metric.Must(meter).NewInt64Counter(name).Add(ctx, data.val, labels...)
case number.Float64Kind:
metric.Must(meter).NewFloat64Counter(name).Add(ctx, float64(data.val), labels...)
default:
assert.Failf(t, "unsupported number testing kind", data.nKind.String())
}
case sdkapi.HistogramInstrumentKind:
switch data.nKind {
case number.Int64Kind:
metric.Must(meter).NewInt64Histogram(name).Record(ctx, data.val, labels...)
case number.Float64Kind:
metric.Must(meter).NewFloat64Histogram(name).Record(ctx, float64(data.val), labels...)
default:
assert.Failf(t, "unsupported number testing kind", data.nKind.String())
}
case sdkapi.GaugeObserverInstrumentKind:
switch data.nKind {
case number.Int64Kind:
metric.Must(meter).NewInt64GaugeObserver(name,
func(_ context.Context, result metric.Int64ObserverResult) {
result.Observe(data.val, labels...)
},
)
case number.Float64Kind:
callback := func(v float64) metric.Float64ObserverFunc {
return metric.Float64ObserverFunc(func(_ context.Context, result metric.Float64ObserverResult) { result.Observe(v, labels...) })
}(float64(data.val))
metric.Must(meter).NewFloat64GaugeObserver(name, callback)
default:
assert.Failf(t, "unsupported number testing kind", data.nKind.String())
}
default:
assert.Failf(t, "unsupported metrics testing kind", data.iKind.String())
}
}
// Flush and close.
require.NoError(t, cont.Stop(ctx))
// Wait >2 cycles.
<-time.After(40 * time.Millisecond)
// Now shutdown the exporter
ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
defer cancel()
if err := exp.Shutdown(ctx); err != nil {
t.Fatalf("failed to stop the exporter: %v", err)
}
// Shutdown the collector too so that we can begin
// verification checks of expected data back.
_ = mcMetrics.Stop()
metrics := mcMetrics.GetMetrics()
assert.Len(t, metrics, len(instruments), "not enough metrics exported")
seen := make(map[string]struct{}, len(instruments))
for _, m := range metrics {
data, ok := instruments[m.Name]
if !ok {
assert.Failf(t, "unknown metrics", m.Name)
continue
}
seen[m.Name] = struct{}{}
switch data.iKind {
case sdkapi.CounterInstrumentKind, sdkapi.GaugeObserverInstrumentKind:
var dp []*metricpb.NumberDataPoint
switch data.iKind {
case sdkapi.CounterInstrumentKind:
require.NotNil(t, m.GetSum())
dp = m.GetSum().GetDataPoints()
case sdkapi.GaugeObserverInstrumentKind:
require.NotNil(t, m.GetGauge())
dp = m.GetGauge().GetDataPoints()
}
if assert.Len(t, dp, 1) {
switch data.nKind {
case number.Int64Kind:
v := &metricpb.NumberDataPoint_AsInt{AsInt: data.val}
assert.Equal(t, v, dp[0].Value, "invalid value for %q", m.Name)
case number.Float64Kind:
v := &metricpb.NumberDataPoint_AsDouble{AsDouble: float64(data.val)}
assert.Equal(t, v, dp[0].Value, "invalid value for %q", m.Name)
}
}
case sdkapi.HistogramInstrumentKind:
require.NotNil(t, m.GetSummary())
if dp := m.GetSummary().DataPoints; assert.Len(t, dp, 1) {
count := dp[0].Count
assert.Equal(t, uint64(1), count, "invalid count for %q", m.Name)
assert.Equal(t, float64(data.val*int64(count)), dp[0].Sum, "invalid sum for %q (value %d)", m.Name, data.val)
}
default:
assert.Failf(t, "invalid metrics kind", data.iKind.String())
}
}
for i := range instruments {
if _, ok := seen[i]; !ok {
assert.Fail(t, fmt.Sprintf("no metric(s) exported for %q", i))
}
}
}