Fix ld logging config (#202)

Author: mraerino

featureflag/featureflag.go

@@ -38,7 +38,7 @@ func NewClient(cfg *Config, logger logrus.FieldLogger) (Client, error) {
 		config.SendEvents = false
 	}
 
-	configureLogger(config.Loggers, logger)
+	configureLogger(&config.Loggers, logger)
 
 	if cfg.RelayHost != "" {
 		config.BaseUri = cfg.RelayHost
@@ -98,7 +98,7 @@ func (c *ldClient) AllEnabledFlags(key string) []string {
 	return flags
 }
 
-func configureLogger(ldLogger ldlog.Loggers, log logrus.FieldLogger) {
+func configureLogger(ldLogger *ldlog.Loggers, log logrus.FieldLogger) {
 	if log == nil {
 		l := logrus.New()
 		l.SetOutput(ioutil.Discard)

featureflag/featureflag_test.go

@@ -1,9 +1,12 @@
 package featureflag
 
 import (
+	"bytes"
 	"testing"
 	"time"
 
+	"github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"gopkg.in/launchdarkly/go-server-sdk.v4/ldfiledata"
 )
@@ -56,3 +59,19 @@ func TestAllEnabledFlags(t *testing.T) {
 
 	require.Equal(t, []string{"my-boolean-flag-key"}, flags)
 }
+
+func TestLogging(t *testing.T) {
+	cfg := Config{
+		Key:            "ABCD",
+		RequestTimeout: time.Second,
+		Enabled:        false,
+	}
+
+	logBuf := new(bytes.Buffer)
+	log := logrus.New()
+	log.Out = logBuf
+
+	_, err := NewClient(&cfg, log.WithField("component", "launch_darkly"))
+	require.NoError(t, err)
+	assert.NotEmpty(t, logBuf.Bytes())
+}