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opentelemetry-go/exporters/otlp/otlpmetric/internal/exporter_test.go
Aaron Clawson e36a361b68
Move otlpmetrics Client to an internal package. (#3486)
* Move otlp client to an internal package

* update changelog

* Apply suggestions from code review

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

* Update CHANGELOG.md

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
2022-11-22 16:01:53 -08:00

101 lines
2.4 KiB
Go

// 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 internal // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal"
import (
"context"
"sync"
"testing"
"github.com/stretchr/testify/assert"
"go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/metric/aggregation"
"go.opentelemetry.io/otel/sdk/metric/metricdata"
mpb "go.opentelemetry.io/proto/otlp/metrics/v1"
)
type client struct {
// n is incremented by all Client methods. If these methods are called
// concurrently this should fail tests run with the race detector.
n int
}
func (c *client) Temporality(k metric.InstrumentKind) metricdata.Temporality {
return metric.DefaultTemporalitySelector(k)
}
func (c *client) Aggregation(k metric.InstrumentKind) aggregation.Aggregation {
return metric.DefaultAggregationSelector(k)
}
func (c *client) UploadMetrics(context.Context, *mpb.ResourceMetrics) error {
c.n++
return nil
}
func (c *client) ForceFlush(context.Context) error {
c.n++
return nil
}
func (c *client) Shutdown(context.Context) error {
c.n++
return nil
}
func TestExporterClientConcurrency(t *testing.T) {
const goroutines = 5
exp := New(&client{})
rm := metricdata.ResourceMetrics{}
ctx := context.Background()
done := make(chan struct{})
first := make(chan struct{}, goroutines)
var wg sync.WaitGroup
for i := 0; i < goroutines; i++ {
wg.Add(1)
go func() {
defer wg.Done()
assert.NoError(t, exp.Export(ctx, rm))
assert.NoError(t, exp.ForceFlush(ctx))
// Ensure some work is done before shutting down.
first <- struct{}{}
for {
_ = exp.Export(ctx, rm)
_ = exp.ForceFlush(ctx)
select {
case <-done:
return
default:
}
}
}()
}
for i := 0; i < goroutines; i++ {
<-first
}
close(first)
assert.NoError(t, exp.Shutdown(ctx))
assert.ErrorIs(t, exp.Shutdown(ctx), errShutdown)
close(done)
wg.Wait()
}