Add test for ErrorMessage

pkg/message/error_message.go

@@ -32,7 +32,7 @@ func (c *ErrorMessage) Encode() []byte {
 	encodedMessage = append(encodedMessage, byteLen...)
 	encodedMessage = append(encodedMessage, byteError...)
 
-	byteMessage := []byte(c.Error)
+	byteMessage := []byte(c.Message)
 	binary.BigEndian.PutUint64(byteLen, uint64(len(byteMessage)))
 	encodedMessage = append(encodedMessage, byteLen...)
 	encodedMessage = append(encodedMessage, byteMessage...)

pkg/message/message_test.go

@@ -2,6 +2,7 @@ package message_test
 
 import (
 	"encoding/binary"
+	"fmt"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -303,3 +304,22 @@ func TestDeleteMsg(t *testing.T) {
 	assert.True(msg2.Confirm)
 	assert.True(msg2.Garbage)
 }
+
+func TestErrorMsg(t *testing.T) {
+	assert := assert.New(t)
+
+	errString := "could not list objects: NoCredentialProviders: no valid providers in chain."
+	messageString := "Deprecated. For verbose messaging see aws.Config.CredentialsChainVerboseErrors"
+	err := fmt.Errorf("%s", errString)
+
+	msg := message.NewErrorMessage(err, messageString)
+	body := msg.Encode()
+
+	assert.Equal(body[8], byte(message.MessageTypeError))
+
+	msg2 := message.ErrorMessage{}
+	msg2.Decode(body[8:])
+
+	assert.Equal(errString, msg2.Error)
+	assert.Equal(messageString, msg2.Message)
+}