stream/mts/meta_test.go: added TestEncode to test Meta.Encoding function

stream/mts/meta_test.go

@@ -28,6 +28,7 @@ LICENSE
 package mts
 
 import (
+	"bytes"
 	"errors"
 	"reflect"
 	"testing"
@@ -127,4 +128,23 @@ func TestDeleteAbsentKey(t *testing.T) {
 
 func TestEncode(t *testing.T) {
 	meta := NewMeta()
+	meta.Add(tstKey1, tstData1)
+	meta.Add(tstKey2, tstData2)
+
+	dataLen := len(tstKey1+tstData1+tstKey2+tstData2) + 3
+	expectedOut := []byte{
+		0x00,
+		0x10,
+		byte(dataLen >> 8),
+		byte(dataLen),
+	}
+	expectedOut = append(expectedOut, []byte(
+		tstKey1+"="+tstData1+"\t"+
+			tstKey2+"="+tstData2)...)
+
+	got := meta.Encode()
+
+	if !bytes.Equal(expectedOut, got) {
+		t.Errorf("Did not get expected out. \nGot : %v \nwant: %v", got, expectedOut)
+	}
 }