Files
core2026/packages/logic/test/uniqueLottery.test.ts
T

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TypeScript

import { describe, expect, it } from 'vitest';
import { LiteHashDRBG, RandUtil } from '@sammo-ts/common';
import type { GeneralItemSlots } from '../src/domain/entities.js';
import type { ItemModule } from '../src/items/types.js';
import {
type UniqueAcquireType,
buildVoteUniqueSeed,
countOccupiedUniqueItems,
resolveUniqueConfig,
rollUniqueLottery,
} from '../src/rewards/uniqueLottery.js';
const buildItem = (key: string, slot: ItemModule['slot'], buyable = false): ItemModule => ({
key,
rawName: key,
name: key,
info: key,
slot,
cost: null,
buyable,
consumable: false,
reqSecu: 0,
unique: !buyable,
});
describe('unique lottery', () => {
const buildRegistry = (): Map<string, ItemModule> =>
new Map<string, ItemModule>([['itemB', buildItem('itemB', 'weapon', false)]]);
const buildConfig = (overrides?: Partial<ReturnType<typeof resolveUniqueConfig>>) =>
resolveUniqueConfig({
allItems: {
weapon: {
itemB: 1,
},
},
maxUniqueItemLimit: [[-1, 1]],
uniqueTrialCoef: 10,
maxUniqueTrialProb: 10,
minMonthToAllowInheritItem: 0,
...(overrides ?? {}),
});
it('returns deterministic item for fixed seed', () => {
const itemRegistry = buildRegistry();
const config = buildConfig();
const rngSeed = buildVoteUniqueSeed('seed', 1, 1);
const rng = new RandUtil(LiteHashDRBG.build(rngSeed));
const result = rollUniqueLottery({
rng,
config,
itemRegistry,
generalItems: { horse: null, weapon: null, book: null, item: null },
occupiedUniqueCounts: new Map(),
scenarioId: 200,
userCount: 1,
currentYear: 200,
currentMonth: 1,
startYear: 180,
initYear: 180,
initMonth: 1,
acquireType: '설문조사',
});
expect(result).toBe('itemB');
});
it('supports acquire types that can yield unique items', () => {
const itemRegistry = buildRegistry();
const config = buildConfig();
const acquireTypes: UniqueAcquireType[] = ['아이템', '설문조사', '랜덤 임관'];
for (const acquireType of acquireTypes) {
const rng = new RandUtil(LiteHashDRBG.build(buildVoteUniqueSeed('seed', 2, 2)));
const result = rollUniqueLottery({
rng,
config,
itemRegistry,
generalItems: { horse: null, weapon: null, book: null, item: null },
occupiedUniqueCounts: new Map(),
scenarioId: 200,
userCount: 1,
currentYear: 200,
currentMonth: 1,
startYear: 180,
initYear: 180,
initMonth: 1,
acquireType,
});
expect(result).toBe('itemB');
}
});
it('guarantees unique on founding acquire type', () => {
const itemRegistry = buildRegistry();
const config = buildConfig({ uniqueTrialCoef: 0, maxUniqueTrialProb: 0 });
const rng = new RandUtil(LiteHashDRBG.build(buildVoteUniqueSeed('seed', 3, 3)));
const result = rollUniqueLottery({
rng,
config,
itemRegistry,
generalItems: { horse: null, weapon: null, book: null, item: null },
occupiedUniqueCounts: new Map(),
scenarioId: 200,
userCount: 1,
currentYear: 200,
currentMonth: 1,
startYear: 180,
initYear: 180,
initMonth: 1,
acquireType: '건국',
});
expect(result).toBe('itemB');
});
it('counts only non-buyable equipped items', () => {
const itemRegistry = new Map<string, ItemModule>([
['uniqueItem', buildItem('uniqueItem', 'weapon', false)],
['buyableItem', buildItem('buyableItem', 'book', true)],
]);
const generals: GeneralItemSlots[] = [
{ horse: null, weapon: 'uniqueItem', book: null, item: null },
{ horse: null, weapon: null, book: 'buyableItem', item: null },
];
const counts = countOccupiedUniqueItems(generals, itemRegistry);
expect(counts.get('uniqueItem')).toBe(1);
expect(counts.get('buyableItem')).toBeUndefined();
});
});