@Override
    public String toString() {
        if (command != null) {
            return "SmppMessage: " + command;
        } else {
            return "SmppMessage: " + getBody();
        }
    }
@Test
    public void toStringShouldReturnTheBodyIfTheCommandIsNull() {
        message = new SmppMessage(camelContext, null, new SmppConfiguration());

        assertEquals("SmppMessage: null", message.toString());
    }