feat: add WriteArg and Scan net.IP(#2062)

* feat: add WriteArg net.IP

* feat: add Scan net.IP

internal/proto/scan.go

@@ -3,6 +3,7 @@ package proto
 import (
 	"encoding"
 	"fmt"
+	"net"
 	"reflect"
 	"time"
 
@@ -115,6 +116,9 @@ func Scan(b []byte, v interface{}) error {
 		return nil
 	case encoding.BinaryUnmarshaler:
 		return v.UnmarshalBinary(b)
+	case *net.IP:
+		*v = b
+		return nil
 	default:
 		return fmt.Errorf(
 			"redis: can't unmarshal %T (consider implementing BinaryUnmarshaler)", v)

internal/proto/writer.go

@@ -4,6 +4,7 @@ import (
 	"encoding"
 	"fmt"
 	"io"
+	"net"
 	"strconv"
 	"time"
 
@@ -106,6 +107,8 @@ func (w *Writer) WriteArg(v interface{}) error {
 			return err
 		}
 		return w.bytes(b)
+	case net.IP:
+		return w.bytes(v)
 	default:
 		return fmt.Errorf(
 			"redis: can't marshal %T (implement encoding.BinaryMarshaler)", v)

internal/proto/writer_test.go

@@ -3,6 +3,8 @@ package proto_test
 import (
 	"bytes"
 	"encoding"
+	"fmt"
+	"net"
 	"testing"
 	"time"
 
@@ -64,6 +66,13 @@ var _ = Describe("WriteBuffer", func() {
 
 		Expect(buf.Len()).To(Equal(15))
 	})
+
+	It("should append net.IP", func() {
+		ip := net.ParseIP("192.168.1.1")
+		err := wr.WriteArgs([]interface{}{ip})
+		Expect(err).NotTo(HaveOccurred())
+		Expect(buf.String()).To(Equal(fmt.Sprintf("*1\r\n$16\r\n%s\r\n", bytes.NewBuffer(ip))))
+	})
 })
 
 type discard struct{}

redis_test.go

@@ -316,6 +316,18 @@ var _ = Describe("Client", func() {
 		err := client.Conn(ctx).Get(ctx, "this-key-does-not-exist").Err()
 		Expect(err).To(Equal(redis.Nil))
 	})
+
+	It("should set and scan net.IP", func() {
+		ip := net.ParseIP("192.168.1.1")
+		err := client.Set(ctx, "ip", ip, 0).Err()
+		Expect(err).NotTo(HaveOccurred())
+
+		var ip2 net.IP
+		err = client.Get(ctx, "ip").Scan(&ip2)
+		Expect(err).NotTo(HaveOccurred())
+
+		Expect(ip2).To(Equal(ip))
+	})
 })
 
 var _ = Describe("Client timeout", func() {