Struct CaesarDecoder 

pub struct CaesarDecoder;

The caesar decoder, call: let caesar_decoder = Decoder::<caesarDecoder>::new() to create a new instance And then call: result = caesar_decoder.crack(input) to decode a caesar string The struct generated by new() comes from interface.rs

use ares::decoders::caesar_decoder::CaesarDecoder;
use ares::decoders::interface::{Crack, Decoder};
use ares::checkers::{athena::Athena, CheckerTypes, checker_type::{Check, Checker}};

let decode_caesar = Decoder::<CaesarDecoder>::new();
let athena_checker = Checker::<Athena>::new();
let checker = CheckerTypes::CheckAthena(athena_checker);

let result = decode_caesar.crack("uryyb guvf vf ybat grkg", &checker).unencrypted_text;
assert!(result.is_some());
// If it succeeds, the 0th element is the plaintext else it'll contain 25 elements
// of unsuccessfully decoded text
assert_eq!(result.unwrap()[0], "hello this is long text");