argoyle
e2ab131684
NewEventsourcedMetrics returns an eventsourced.MetricsRecorder that maps the framework's Metric values (command duration, event store/load, snapshots, idempotency checks) onto OTel instruments on the global MeterProvider set by SetupOTelSDK. Intended for pg.WithMetrics and eventsourced.WithMetrics.
76 lines
2.2 KiB
Go
76 lines
2.2 KiB
Go
package otelsetup
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import (
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"context"
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"sort"
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"testing"
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"time"
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"gitlab.com/unboundsoftware/eventsourced/eventsourced"
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"go.opentelemetry.io/otel"
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sdkmetric "go.opentelemetry.io/otel/sdk/metric"
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"go.opentelemetry.io/otel/sdk/metric/metricdata"
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)
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func TestNewEventsourcedMetrics_RecordsContract(t *testing.T) {
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reader := sdkmetric.NewManualReader()
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otel.SetMeterProvider(sdkmetric.NewMeterProvider(sdkmetric.WithReader(reader)))
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r, err := NewEventsourcedMetrics()
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if err != nil {
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t.Fatalf("NewEventsourcedMetrics returned error: %v", err)
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}
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if r == nil {
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t.Fatal("NewEventsourcedMetrics returned nil recorder")
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}
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// Recording every known metric type (and an unknown one) must not panic
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// and must emit the expected instruments.
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for _, m := range []eventsourced.Metric{
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eventsourced.CommandDuration{CommandType: "AddEntry", Duration: time.Millisecond, Success: true},
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eventsourced.EventStored{AggregateType: "Entry", EventType: "EntryAdded", Duration: time.Millisecond},
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eventsourced.EventsLoaded{AggregateType: "Entry", EventCount: 3, Duration: time.Millisecond},
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eventsourced.SnapshotStored{AggregateType: "Entry", Duration: time.Millisecond, Success: true},
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eventsourced.SnapshotLoaded{AggregateType: "Entry", Found: false, Duration: time.Millisecond},
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eventsourced.IdempotencyCheck{AggregateType: "Entry", Hit: true},
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unknownMetric{},
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} {
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r.Record(context.Background(), m)
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}
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var rm metricdata.ResourceMetrics
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if err := reader.Collect(context.Background(), &rm); err != nil {
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t.Fatalf("collect: %v", err)
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}
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got := map[string]bool{}
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for _, sm := range rm.ScopeMetrics {
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for _, md := range sm.Metrics {
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got[md.Name] = true
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}
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}
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want := []string{
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"eventsourced.command.duration",
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"eventsourced.event.store.duration",
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"eventsourced.events.loaded",
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"eventsourced.event.load.duration",
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"eventsourced.snapshot.store.duration",
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"eventsourced.snapshot.load.duration",
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"eventsourced.idempotency.checks",
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}
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var missing []string
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for _, w := range want {
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if !got[w] {
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missing = append(missing, w)
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}
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}
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if len(missing) > 0 {
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sort.Strings(missing)
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t.Errorf("missing expected metrics: %v", missing)
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}
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}
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type unknownMetric struct{}
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func (unknownMetric) IsMetric() {}
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