#[cfg(test)]
mod examples {
    use day48::tree;

    #[test]
    fn test1() {
        assert_eq!(tree(1), vec!["#"]);
    }

    #[test]
    fn test2() {
        assert_eq!(tree(2), vec![" # ", "###"]);
    }

    #[test]
    fn test3() {
        assert_eq!(
            tree(5),
            vec![
                "    #    ",
                "   ###   ",
                "  #####  ",
                " ####### ",
                "#########"
            ]
        );
    }

    #[test]
    fn test4() {
        assert_eq!(tree(0), Vec::<String>::new());
    }
}