public void MessageErrorMessageEmpty()
        {
            Message m_null = new ErrorMessage(null);
            Assert.AreEqual(Message.MSG_NOT_DEFINED, m_null.Text);

            Message m_empty = new ErrorMessage("");
            Assert.AreEqual(Message.MSG_NOT_DEFINED, m_empty.Text);
        }
 public void MessageErrorMessageCanBeCreated()
 {
     string em_text = "This is an error message.";
     Message em = new ErrorMessage(em_text);
     Assert.AreEqual(em_text, em.Text);
 }