spb/cancerindex

1import { describe, expect, it } from 'vitest';2import { rankEntities, percentiles, inputsHash } from '../src/rank.js';34describe('rankEntities', () => {5  it('is deterministic and handles ties with competition ranking', () => {6    const items = [7      { id: 'b', value: 10 },8      { id: 'a', value: 10 },9      { id: 'c', value: 5 },10      { id: 'd', value: 1 },11    ];12    const r = rankEntities(items);13    expect(r.map((x) => [x.id, x.rank])).toEqual([14      ['a', 1],15      ['b', 1],16      ['c', 3],17      ['d', 4],18    ]);19    expect(r[0]!.percentile).toBe(100);20    expect(r[3]!.percentile).toBe(0);21    expect(rankEntities([...items].reverse())).toEqual(r);22  });23  it('drops non-finite values and ranks ascending when requested', () => {24    const r = rankEntities([{ id: 'x', value: NaN }, { id: 'y', value: 2 }, { id: 'z', value: 1 }], { descending: false });25    expect(r.map((x) => x.id)).toEqual(['z', 'y']);26    expect(r[0]!.eligible).toBe(2);27  });28  it('percentiles and hash are stable', async () => {29    const items = [{ id: 'a', value: 3 }, { id: 'b', value: 1 }];30    expect(percentiles(items).get('a')).toBe(100);31    expect(await inputsHash(items)).toBe(await inputsHash([...items].reverse()));32  });33});34