message.addOutboundAttachment("foo", valA);
message.addOutboundAttachment("bar", valB);
Set<Map.Entry<String, DataHandler>> entrySet = (Set<Entry<String, DataHandler>>)evaluate(
"message.outboundAttachments.entrySet()", message);
assertEquals(2, entrySet.size());
entrySet.contains(new DefaultMapEntry("foo", valA));
entrySet.contains(new DefaultMapEntry("bar", valB));
}