public void testCreateAndModify() {
Map<String, DataHandler> content = new HashMap<String, DataHandler>();
content.put("att-1", new DataHandler(new ByteArrayDataSource("Hello world!".getBytes(), "text/plain")));
content.put("att-2", new DataHandler(new ByteArrayDataSource("Hola mundo!".getBytes(), "text/plain")));
WrappedAttachments attachments = new WrappedAttachments(content);
Attachment att3 = new AttachmentImpl("att-3",
new DataHandler(new ByteArrayDataSource("Bonjour tout le monde!".getBytes(), "text/plain")));
assertEquals(2, attachments.size());
assertFalse(attachments.isEmpty());