Merge pull request #2 from alexsn/zap-types

Add support for zap.Stringer and zap.Duration types

utils/fields.go

@@ -1,7 +1,9 @@
 package utils
 
 import (
+	"fmt"
 	"math"
+	"time"
 
 	opentracinglog "github.com/opentracing/opentracing-go/log"
 	"go.uber.org/zap/zapcore"
@@ -40,10 +42,14 @@ func ZapFieldToOpentracing(zapField zapcore.Field) opentracinglog.Field {
 		return opentracinglog.Int32(zapField.Key, int32(zapField.Integer))
 	case zapcore.StringType:
 		return opentracinglog.String(zapField.Key, zapField.String)
+	case zapcore.StringerType:
+		return opentracinglog.String(zapField.Key, zapField.Interface.(fmt.Stringer).String())
 	case zapcore.Uint64Type:
 		return opentracinglog.Uint64(zapField.Key, uint64(zapField.Integer))
 	case zapcore.Uint32Type:
 		return opentracinglog.Uint32(zapField.Key, uint32(zapField.Integer))
+	case zapcore.DurationType:
+		return opentracinglog.String(zapField.Key, time.Duration(zapField.Integer).String())
 	case zapcore.ErrorType:
 		return opentracinglog.Error(zapField.Interface.(error))
 	default:

utils/fields_test.go

@@ -2,12 +2,21 @@ package utils
 
 import (
 	"testing"
+	"time"
 
 	opentracinglog "github.com/opentracing/opentracing-go/log"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
 
+type stringer struct {
+	string
+}
+
+func (s stringer) String() string {
+	return s.string
+}
+
 func TestFieldsConversion(t *testing.T) {
 
 	TestData := []struct {
@@ -26,6 +35,14 @@ func TestFieldsConversion(t *testing.T) {
 			zap.String("", "123"),
 			opentracinglog.String("", "123"),
 		},
+		{
+			zap.Stringer("namespace", stringer{""}),
+			opentracinglog.String("namespace", ""),
+		},
+		{
+			zap.Stringer("", stringer{"123"}),
+			opentracinglog.String("", "123"),
+		},
 		{
 			zap.Int("namespace", 1),
 			opentracinglog.Int64("namespace", 1),
@@ -46,6 +63,10 @@ func TestFieldsConversion(t *testing.T) {
 			zap.Uint64("namespace", 1),
 			opentracinglog.Uint64("namespace", 1),
 		},
+		{
+			zap.Duration("namespace", time.Second),
+			opentracinglog.String("namespace", "1s"),
+		},
 		{
 			zap.Float32("namespace", 1),
 			opentracinglog.Float32("namespace", 1),