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client.go
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client.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"
"errors"
"sync"
"testing"
"time"
"go.opentelemetry.io/otel/exporters/otlp/otlpmetric"
)
func RunExporterShutdownTest(t *testing.T, factory func() otlpmetric.Client) {
t.Run("testClientStopHonorsTimeout", func(t *testing.T) {
testClientStopHonorsTimeout(t, factory())
})
t.Run("testClientStopHonorsCancel", func(t *testing.T) {
testClientStopHonorsCancel(t, factory())
})
t.Run("testClientStopNoError", func(t *testing.T) {
testClientStopNoError(t, factory())
})
t.Run("testClientStopManyTimes", func(t *testing.T) {
testClientStopManyTimes(t, factory())
})
}
func initializeExporter(t *testing.T, client otlpmetric.Client) *otlpmetric.Exporter {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
defer cancel()
e, err := otlpmetric.New(ctx, client)
if err != nil {
t.Fatalf("failed to create exporter")
}
return e
}
func testClientStopHonorsTimeout(t *testing.T, client otlpmetric.Client) {
e := initializeExporter(t, client)
innerCtx, innerCancel := context.WithTimeout(context.Background(), time.Microsecond)
<-innerCtx.Done()
if err := e.Shutdown(innerCtx); err == nil {
t.Error("expected context DeadlineExceeded error, got nil")
} else if !errors.Is(err, context.DeadlineExceeded) {
t.Errorf("expected context DeadlineExceeded error, got %v", err)
}
innerCancel()
}
func testClientStopHonorsCancel(t *testing.T, client otlpmetric.Client) {
e := initializeExporter(t, client)
ctx, innerCancel := context.WithCancel(context.Background())
innerCancel()
if err := e.Shutdown(ctx); err == nil {
t.Error("expected context canceled error, got nil")
} else if !errors.Is(err, context.Canceled) {
t.Errorf("expected context canceled error, got %v", err)
}
}
func testClientStopNoError(t *testing.T, client otlpmetric.Client) {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
defer cancel()
e := initializeExporter(t, client)
if err := e.Shutdown(ctx); err != nil {
t.Errorf("shutdown errored: expected nil, got %v", err)
}
}
func testClientStopManyTimes(t *testing.T, client otlpmetric.Client) {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
defer cancel()
e := initializeExporter(t, client)
ch := make(chan struct{})
wg := sync.WaitGroup{}
const num int = 20
wg.Add(num)
errs := make([]error, num)
for i := 0; i < num; i++ {
go func(idx int) {
defer wg.Done()
<-ch
errs[idx] = e.Shutdown(ctx)
}(i)
}
close(ch)
wg.Wait()
for _, err := range errs {
if err != nil {
t.Fatalf("failed to shutdown exporter: %v", err)
}
}
}