#[warn(dead_code)]
fn main() {
    let spade = Suit::Spade;

    println!("{:?}", spade);
}

#[derive(Debug, PartialEq, PartialOrd)]
enum Suit {
    Spade,
    Club,
    Heart,
    Diamond,
}

#[derive(Debug, PartialEq)]
enum Rank {
    Ace,
    King,
    Queen,
    Jack,
    Ten,
    Nine,
    Eight,
    Seven,
    Six,
    Five,
    Four,
    Three,
    Two,
}

fn suit_to_char(suit: &Suit) -> char {
    match suit {
        Suit::Spade => '♠',
        Suit::Club => '♣',
        Suit::Heart => '♥',
        Suit::Diamond => '♦',
    }
}

fn rank_to_str(rank: &Rank) -> &str {
    match rank {
        Rank::Ace => "A",
        Rank::King => "K",
        Rank::Queen => "Q",
        Rank::Jack => "J",
        Rank::Ten => "10",
        Rank::Nine => "9",
        Rank::Eight => "8",
        Rank::Seven => "7",
        Rank::Six => "6",
        Rank::Five => "5",
        Rank::Four => "4",
        Rank::Three => "3",
        Rank::Two => "2",
    }
}

#[test]
fn test_suit_to_char() {
    let char = '♠';
    let suit = Suit::Spade;
    assert_eq!(char, suit_to_char(&suit));
}

#[test]
fn test_suit_order() {
    let spade = Suit::Spade;
    let diamond = Suit::Diamond;
    assert!(spade > diamond);
}