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Dune/tests/native-ixian-replacement.test.ts
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TypeScript

import assert from 'node:assert/strict';
import test from 'node:test';
import { applyAction, viewGame, type Action, type Game } from '../game/engine';
import type { Card } from '../game/cards';
import { richeseCards } from '../game/richese-cards';
import {
createIxianReplacementSource, IxianReplacementError,
type IxianReplacementContext,
} from '../game/nexus-ixian-replacement';
import {
assertNativeIxianReplacementInventory, createNativeIxianReplacementFixture,
} from './fixture-native-ixian-replacement';
import { settleIxianReplacementFixture } from './fixture-nexus-ixian-replacement';
const owner = (game: Game, id: string) => game.players.find(player => player.id === id)!;
const reload = (game: Game): Game => JSON.parse(JSON.stringify(game));
function reject(game: Game, id: string, action: Action): void {
const before = structuredClone(game);
assert.throws(() => applyAction(game, id, action));
assert.deepEqual(game, before);
}
for (const buyerFaction of ['atreides', 'tleilaxu'] as const)
void test(`Basic native ${buyerFaction} paid Ix special replacement preserves its purchase and settles the real suffix once`, () => {
const endingAuction = buyerFaction === 'tleilaxu';
const f = createNativeIxianReplacementFixture({ buyerFaction, endingAuction });
assert.equal(f.beforeNexusDraw.nexusCards!.cards!.hands[f.buyer], null);
assert.equal(owner(f.beforeNexusDraw, f.buyer).ally, null);
const partners = f.beforeNexusDraw.players.filter(player => player.id !== f.buyer);
assert.equal(partners[0].ally, partners[1].id);
assert.equal(partners[1].ally, partners[0].id);
assert.equal(applyAction(reload(f.beforeNexusDraw), f.buyer, f.nexusDrawAction).nexusCards!.cards!.hands[f.buyer], 'ixians');
assert.equal(f.purchased.id, 'ix-thumper');
assert.equal(f.nextCard.id, 'ix-amal');
const offer = viewGame(f.game, f.buyer).nexusIxianReplacement!;
assert.equal(offer.canUse, true);
assert.equal(offer.canPass, true);
assert.deepEqual(offer.purchased, f.purchased);
assert.equal(owner(f.game, f.buyer).spice, f.beforeSpice - 2);
assert.equal(owner(f.game, f.emperor!).spice, f.beforeEmperorSpice);
const deckBefore = structuredClone(f.game.deck);
const unsold = structuredClone(f.game.auction!.cards.slice(f.auctionIndex + 1));
const use = settleIxianReplacementFixture(applyAction(reload(f.game), f.buyer,
{ type: 'nexusIxianReplacementUse', event: offer.event }));
assert.deepEqual(owner(use, f.buyer).hand, [...owner(f.beforePayment, f.buyer).hand, f.nextCard]);
assert.deepEqual(use.deck, deckBefore.slice(1));
assert.deepEqual(use.discard, [...f.game.discard, f.purchased]);
assert.equal(use.nexusCards!.cards!.hands[f.buyer], null);
assert.deepEqual(use.nexusCards!.cards!.discard, [...f.game.nexusCards!.cards!.discard, 'ixians']);
assert.equal(owner(use, f.buyer).spice, f.paidSpice);
assert.equal(owner(use, f.emperor!).spice, f.beforeEmperorSpice! + 2);
assert.equal(use.currentAuctionSale, null);
assert.equal(use.pendingNexusIxianReplacement, null);
if (endingAuction) {
assert.equal(use.auction, null);
assert.equal(use.phase, 4);
} else {
assert.equal(use.auction!.index, f.auctionIndex + 1);
assert.deepEqual(use.auction!.cards.slice(use.auction!.index), unsold);
}
reject(use, f.buyer, { type: 'nexusIxianReplacementUse', event: f.event });
reject(use, f.buyer, { type: 'nexusIxianReplacementPass', event: f.event });
});
void test('native Pass keeps the purchased Ix special and genuinely acquired Nexus without a draw or repayment', () => {
const f = createNativeIxianReplacementFixture();
const offer = viewGame(f.game, f.buyer).nexusIxianReplacement!;
const pass = settleIxianReplacementFixture(applyAction(reload(f.game), f.buyer,
{ type: 'nexusIxianReplacementPass', event: offer.event }));
assert.deepEqual(owner(pass, f.buyer).hand, owner(f.game, f.buyer).hand);
assert.deepEqual(pass.deck, f.game.deck);
assert.deepEqual(pass.discard, f.game.discard);
assert.deepEqual(pass.nexusCards!.cards, f.game.nexusCards!.cards);
assert.equal(owner(pass, f.buyer).spice, f.paidSpice);
assert.equal(owner(pass, f.emperor!).spice, f.beforeEmperorSpice! + 2);
assert.equal(pass.auction!.index, f.auctionIndex + 1);
assert.equal(pass.currentAuctionSale, null);
assertNativeIxianReplacementInventory(pass);
reject(pass, f.buyer, { type: 'nexusIxianReplacementUse', event: f.event });
});
void test('native descriptor admission rejects forged Ix effects and unrelated Richese faces even with matching row and hand', () => {
const f = createNativeIxianReplacementFixture();
const source = f.game.pendingNexusIxianReplacement!;
for (const corrupt of [
{ ...f.purchased, effect: 'amal' },
{ ...f.purchased, name: 'Amal' },
{ ...f.purchased, kind: 'worthless' },
{ ...f.purchased, extra: true },
richeseCards()[0],
] as Card[]) {
const ctx: IxianReplacementContext = {
status: f.game.status, phase: f.game.phase, turn: f.game.turn, sequence: source.sequence,
auction: { ...f.game.auction!, cards: f.game.auction!.cards.map((card, index) =>
index === f.auctionIndex ? corrupt : card) },
sale: f.game.currentAuctionSale!,
players: f.game.players.map(player => ({
id: player.id, handLimit: 4,
hand: player.hand.map(card => card.id === f.purchased.id ? corrupt : card),
})),
physicalCards: [
...f.game.players.flatMap(player => player.hand), ...f.game.deck, ...f.game.discard,
...f.game.auction!.cards.slice(f.auctionIndex + 1),
].map(card => card.id === f.purchased.id ? corrupt : card),
};
assert.throws(() => createIxianReplacementSource(ctx, source.event, source.parent), IxianReplacementError);
}
const parent = reload(f.beforePayment);
parent.auction!.cards[parent.auction!.index].effect = 'amal';
reject(parent, f.buyer, f.paymentAction);
});