handler.storeSessionInfoToMessage(session, message);
// store save session to outbound, move it to the inbound
// for retrieve to deserialize
Object s = message.removeProperty(MuleProperties.MULE_SESSION_PROPERTY);
message.setInboundProperty(MuleProperties.MULE_SESSION_PROPERTY, s);
session = handler.retrieveSessionInfoFromMessage(message);
Object obj = session.getProperty("fooString");
assertTrue(obj instanceof String);
assertEquals(string, obj);