Function check_is_narrow_welcome

repl/src/lib.rs:307–327

Runs `print_welcome` against a console that is `console_width` in height and returns whether the narrow welcome message was printed or not, and the maximum width of all printed messages.

(console_width: u16)

    /// whether the narrow welcome message was printed or not, and the maximum width of all
    /// printed messages.
    fn check_is_narrow_welcome(console_width: u16) -> (bool, usize) {
        let console = Rc::from(RefCell::from(MockConsole::default()));
        console.borrow_mut().set_size_chars(CharsXY::new(console_width, 1));
        print_welcome(&mut *console.borrow_mut()).unwrap();

        let mut console = console.borrow_mut();
        let mut found = false;
        let mut max_length = 0;
        for output in console.take_captured_out() {
            match output {
                CapturedOut::Print(msg) => {
                    if msg.contains("Type HELP") {
                        found = true;
                        max_length = std::cmp::max(max_length, msg.len());
                    }
                }
                _ => panic!("Unexpected console operation: {:?}", output),
            }
        }
        (!found, max_length)
    }

    #[test]
    fn test_print_welcome_wide_console() {