storage: Move NewMessage() into Store interface for #69

pkg/storage/file/fstore.go

@@ -175,6 +175,15 @@ func (fs *Store) LockFor(emailAddress string) (*sync.RWMutex, error) {
 	return fs.hashLock.Get(hash), nil
 }
 
+// NewMessage is temproary until #69 MessageData refactor
+func (fs *Store) NewMessage(mailbox string) (storage.Message, error) {
+	mb, err := fs.MailboxFor(mailbox)
+	if err != nil {
+		return nil, err
+	}
+	return mb.(*Mailbox).NewMessage()
+}
+
 // Mailbox implements Mailbox, manages the mail for a specific user and
 // correlates to a particular directory on disk.
 type Mailbox struct {

pkg/storage/file/fstore_test.go

@@ -490,13 +490,9 @@ func deliverMessage(ds *Store, mbName string, subject string,
 	testMsg = append(testMsg, []byte("\r\n")...)
 	testMsg = append(testMsg, []byte("Test Body\r\n")...)
 
-	mb, err := ds.MailboxFor(mbName)
-	if err != nil {
-		panic(err)
-	}
 	// Create message object
 	id = generateID(date)
-	msg, err := mb.NewMessage()
+	msg, err := ds.NewMessage(mbName)
 	if err != nil {
 		panic(err)
 	}