public void Message_2at4_CantParse2at4()
 {
     var exception = new LexicalParsingException("2@4");
     Assert.That(exception.Message, Is.EqualTo("Can't parse expression 2@4"));
 }
 public void Expression_2at4_2at4()
 {
     var exception = new LexicalParsingException("2@4");
     Assert.That(exception.Expression, Is.EqualTo("2@4"));
 }