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use zagan_bet::blackjack::{
card_label, card_value, fresh_shoe, hand_total, is_blackjack, BlackjackState,
};
use zagan_bet::server::games::blackjack::BlackjackGame;
fn hand(deck: &[&str], bet: u64) -> zagan_bet::server::games::blackjack::BlackjackHand {
let deck = deck.iter().map(|card| card.to_string()).collect();
BlackjackGame::with_deck(deck).deal(bet)
}
#[test]
fn card_values_and_soft_totals_are_correct() {
assert_eq!(card_value("AS"), 11);
assert_eq!(card_value("10H"), 10);
assert_eq!(card_value("KD"), 10);
assert_eq!(card_label("AS"), "A♠");
assert_eq!(card_label("10H"), "10♥");
let cards = |values: &[&str]| {
values
.iter()
.map(|card| card.to_string())
.collect::<Vec<_>>()
};
assert_eq!(hand_total(&cards(&["AS", "10H"])), 21);
assert_eq!(hand_total(&cards(&["AS", "9H"])), 20);
assert_eq!(hand_total(&cards(&["AS", "AS", "9H"])), 21);
assert!(is_blackjack(&cards(&["AS", "KH"])));
assert!(!is_blackjack(&cards(&["AS", "9H"])));
}
#[test]
fn a_six_deck_shoe_has_312_cards() {
let shoe = fresh_shoe();
assert_eq!(shoe.len(), 312);
assert_eq!(shoe.iter().filter(|card| card.as_str() == "AS").count(), 6);
}
#[test]
fn a_natural_blackjack_settles_immediately() {
let hand = hand(&["AS", "9D", "KH", "8C"], 10);
assert!(hand.is_done());
assert_eq!(hand.result, "blackjack");
assert_eq!(hand.winnings, 25); // 10 + 15
assert_eq!(hand.player_total(), 21);
}
#[test]
fn a_player_hand_can_hit_to_21() {
let mut hand = hand(&["10S", "9D", "6H", "8C", "5D"], 10);
assert_eq!(hand.player_total(), 16);
assert_eq!(hand.dealer_total(), 17);
hand.hit().unwrap();
assert!(hand.is_done());
assert_eq!(hand.player_total(), 21);
assert_eq!(hand.result, "win");
assert_eq!(hand.winnings, 20);
}
#[test]
fn hitting_over_21_busts() {
let mut hand = hand(&["10S", "9D", "6H", "8C", "KD"], 10);
hand.hit().unwrap();
assert!(hand.is_done());
assert_eq!(hand.result, "bust");
assert_eq!(hand.winnings, 0);
}
#[test]
fn doubling_adds_the_base_bet_and_draws_one_card() {
let mut hand = hand(&["5S", "9D", "5H", "8C", "10D"], 10);
assert_eq!(hand.player_total(), 10);
hand.double().unwrap();
assert_eq!(hand.player.len(), 3);
assert_eq!(hand.bet, 20);
assert_eq!(hand.player_total(), 20);
assert_eq!(hand.result, "win");
assert_eq!(hand.winnings, 40);
}
#[test]
fn forfeiting_loses_the_bet() {
let mut hand = hand(&["10S", "9D", "6H", "8C"], 10);
hand.forfeit();
assert!(hand.is_done());
assert_eq!(hand.result, "forfeit");
assert_eq!(hand.winnings, 0);
assert_eq!(hand.bet, 10);
}
#[test]
fn the_dealer_busts_and_the_player_wins() {
let mut hand = hand(&["10S", "7H", "8H", "9C", "10H"], 10);
assert_eq!(hand.player_total(), 18);
assert_eq!(hand.dealer_total(), 16);
hand.stand();
assert_eq!(hand.dealer_total(), 26);
assert_eq!(hand.result, "win");
assert_eq!(hand.winnings, 20);
}
#[test]
fn the_dealer_stands_on_soft_17() {
let mut hand = hand(&["10S", "AD", "8H", "6C"], 10);
assert_eq!(hand.dealer_total(), 17);
hand.stand();
assert_eq!(hand.dealer.len(), 2, "dealer must stand on soft 17");
assert_eq!(hand.result, "win");
assert_eq!(hand.winnings, 20);
}
#[test]
fn equal_totals_push() {
let mut hand = hand(&["10S", "10D", "8H", "8C"], 10);
hand.stand();
assert_eq!(hand.result, "push");
assert_eq!(hand.winnings, 10);
}
#[test]
fn dealer_blackjack_wins_unless_player_also_has_it() {
let dealer_blackjack = hand(&["10S", "AS", "8H", "KD"], 10);
assert_eq!(dealer_blackjack.result, "lose");
assert_eq!(dealer_blackjack.winnings, 0);
let both = hand(&["AS", "AD", "KH", "KC"], 10);
assert_eq!(both.result, "push");
assert_eq!(both.winnings, 10);
}
#[test]
fn the_player_state_hides_the_hole_card() {
let hand = hand(&["10S", "9D", "6H", "8C"], 10);
let state: BlackjackState = hand.state("session-1", 990);
assert_eq!(state.phase, "player");
assert_eq!(state.dealer, vec!["9D".to_string(), "?".to_string()]);
assert_eq!(state.dealer_total, 9);
assert_eq!(state.player_total, 16);
assert_eq!(state.actions, vec!["hit", "stand", "double"]);
assert_eq!(state.bet, 10);
assert_eq!(state.balance, 990);
}
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