fn vigenere(input: &str, key: &str) -> String {
    let mut out = String::new();

    out
}

fn main() {
    println!("Hello, world!");
}

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

    #[test]
    fn vigenere_wiki1() {
        let message = "attacking tonight";
        let key = "OCULORHINOLARINGOLOGY";
        let out = "ovnlqbpvt hznzouz";
        assert_eq!(vigenere(&message, &key), out);
    }
}