encoding: Add Gob encoding.

Signed-off-by: Simarpreet Singh <simar@linux.com>

Author: simar7

encoding/codec.go

@@ -7,4 +7,5 @@ type Codec interface {
 
 var (
 	JSON = JSONCodec{}
+	Gob  = GobCodec{}
 )

encoding/gob.go

@@ -0,0 +1,23 @@
+package encoding
+
+import (
+	"bytes"
+	"encoding/gob"
+)
+
+type GobCodec struct{}
+
+func (c GobCodec) Marshal(v interface{}) ([]byte, error) {
+	var b bytes.Buffer
+	encoder := gob.NewEncoder(&b)
+	if err := encoder.Encode(v); err != nil {
+		return nil, err
+	}
+	return b.Bytes(), nil
+}
+
+func (c GobCodec) Unmarshal(data []byte, v interface{}) error {
+	r := bytes.NewReader(data)
+	decoder := gob.NewDecoder(r)
+	return decoder.Decode(v)
+}

encoding/gob_test.go

@@ -0,0 +1,38 @@
+package encoding
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+var tsBytes = []byte{0x30, 0xff, 0x81, 0x3, 0x1, 0x1, 0xa, 0x74, 0x65, 0x73, 0x74,
+	0x53, 0x74, 0x72, 0x75, 0x63, 0x74, 0x1, 0xff, 0x82, 0x0, 0x1, 0x3, 0x1, 0x3,
+	0x46, 0x6f, 0x6f, 0x1, 0xc, 0x0, 0x1, 0x3, 0x42, 0x61, 0x72, 0x1, 0x8, 0x0,
+	0x1, 0x3, 0x42, 0x61, 0x7a, 0x1, 0x4, 0x0, 0x0, 0x0, 0x15, 0xff, 0x82, 0x1,
+	0x9, 0x66, 0x6f, 0x6f, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x1, 0xfe, 0x45,
+	0x40, 0x1, 0xff, 0xf6, 0x0}
+
+var ts = testStruct{
+	Foo: "foostring",
+	Bar: 42.0,
+	Baz: 123,
+}
+
+func TestGobCodec_Marshal(t *testing.T) {
+	gc := GobCodec{}
+	data, err := gc.Marshal(testStruct{
+		Foo: "foostring",
+		Bar: 42.0,
+		Baz: 123,
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, tsBytes, data)
+}
+
+func TestGobCodec_Unmarshal(t *testing.T) {
+	gc := GobCodec{}
+	var data testStruct
+	assert.NoError(t, gc.Unmarshal(tsBytes, &data))
+	assert.Equal(t, ts, data)
+}