#[must_use]
pub fn handify(input: &str) -> String {
    let input = input.to_uppercase();
    let input = input.trim().to_owned();
    let mut input = input.replace(" ", " \u{1f44f} ");
    if !input.is_empty() {
        input = format!("\u{1f44f} {} \u{1f44f}", input);
    }
    input
}

#[cfg(test)]
mod test {
    use super::*;

    #[test]
    fn handify_test_no_trailing_spaces() {
        let input = "hello world";
        assert_eq!(handify(input), "\u{1f44f} HELLO \u{1f44f} WORLD \u{1f44f}");
    }

    #[test]
    fn handify_test_with_trailing_spaces() {
        let input = " hello world ";
        assert_eq!(handify(input), "\u{1f44f} HELLO \u{1f44f} WORLD \u{1f44f}")
    }

    #[test]
    fn handify_test_empty_string() {
        let input = "";
        assert_eq!(handify(input), "");
    }
}