Fix data race in scraper_test.

receiver/dcgmreceiver/scraper_test.go

@@ -20,6 +20,7 @@ package dcgmreceiver
 import (
 	"context"
 	"strings"
+	"sync"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -33,10 +34,13 @@ import (
 
 func TestScraperWithoutDcgm(t *testing.T) {
 	var settings receiver.CreateSettings
+	var mu sync.Mutex
 	seenDcgmNotInstalledWarning := false
 	settings.Logger = zaptest.NewLogger(t, zaptest.WrapOptions(zap.Hooks(func(e zapcore.Entry) error {
 		if e.Level == zap.WarnLevel && strings.Contains(e.Message, "Unable to connect to DCGM daemon at localhost:5555 on libdcgm.so not Found; Is the DCGM daemon running") {
+			mu.Lock()
 			seenDcgmNotInstalledWarning = true
+			mu.Unlock()
 		}
 		return nil
 	})))
@@ -48,13 +52,17 @@ func TestScraperWithoutDcgm(t *testing.T) {
 	require.NoError(t, err)
 
 	metrics, err := scraper.scrape(context.Background())
+	mu.Lock()
 	assert.Equal(t, true, seenDcgmNotInstalledWarning)
+	mu.Unlock()
 	assert.NoError(t, err) // If failed to init DCGM, should have no error
 	assert.Equal(t, 0, metrics.MetricCount())
 
 	// Scrape again with DCGM not available
 	metrics, err = scraper.scrape(context.Background())
+	mu.Lock()
 	assert.Equal(t, true, seenDcgmNotInstalledWarning)
+	mu.Unlock()
 	assert.NoError(t, err)
 	assert.Equal(t, 0, metrics.MetricCount())