#[cfg(test)]
mod index {
    #[test]
    fn run() {
        let i = df_code::random_number(0, 10);
        println!("{}", i);
        let i = df_code::random_number_f64(0.0, 100.0);
        println!("{}", i);
        let i = df_code::verification_code(4);
        println!("{}", i);
        let i = df_code::random_password(4);
        println!("{}", i);
    }
}