Initialize logger.

plugins/inputs/opcua/opcua_client_test.go

@@ -7,6 +7,8 @@ import (
 	"time"
 
 	"github.com/influxdata/telegraf/config"
+	"github.com/influxdata/telegraf/testutil"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -40,6 +42,7 @@ func TestClient1Integration(t *testing.T) {
 	o.RequestTimeout = config.Duration(1 * time.Second)
 	o.SecurityPolicy = "None"
 	o.SecurityMode = "None"
+	o.Log = testutil.Logger{}
 	for _, tags := range testopctags {
 		o.RootNodes = append(o.RootNodes, MapOPCTag(tags))
 	}
@@ -250,6 +253,7 @@ func TestValidateOPCTags(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			o := OpcUA{
 				nodes: tt.nodes,
+				Log:   testutil.Logger{},
 			}
 			require.Equal(t, tt.err, o.validateOPCTags())
 		})