new Message("1=FIX.4.2"); fail("no exception thrown");
Message message = new Message("1=FIX.4.2"); assertFalse(message.hasValidStructure());
    public void testHeaderOutOfOrder() throws Exception {        try {            new Message("1=FIX.4.2");            fail("no exception thrown");        } catch (InvalidMessage e) {            // expected        }    }