1import { describe, expect, it } from 'vitest';
2import { position, starting } from './lyrics.mjs';
3
4const lyric = { text: 'It breaks.', seconds: 1.5, syllables: [['It ', 0.1], ['breaks.', 0.6]] };
5
6describe('position', () => {
7  it('waits before the first syllable, then says which is sung and how far to the next', () => {
8    expect(position(lyric, 50)).toMatchObject({ index: -1, over: false });
9    expect(position(lyric, 100).index).toBe(0);
10    expect(position(lyric, 100).progress).toBeCloseTo(0);
11    expect(position(lyric, 350).progress).toBeCloseTo(0.5);
12    expect(position(lyric, 600).index).toBe(1);
13  });
14  it('runs the last syllable to the clip\'s end, then is over', () => {
15    expect(position(lyric, 1050)).toMatchObject({ index: 1, over: false });
16    expect(position(lyric, 1050).progress).toBeCloseTo(0.5);
17    expect(position(lyric, 1500)).toMatchObject({ index: 1, progress: 1, over: true });
18  });
19});
20
21describe('starting', () => {
22  const hap = (value, begin, end = begin + 1) => ({ value, whole: { begin, end } });
23  const words = { ck1a: lyric, ck1b: lyric };
24  it('keeps the haps of sounds that have words, once they have begun, keyed by sound and cycle', () => {
25    const haps = [hap({ s: 'ck1a' }, 8), hap({ s: 'bd' }, 8), hap({ s: 'ck1b' }, 10), hap({ note: 60 }, 8)];
26    expect(starting(haps, 8.25, words)).toEqual([{ key: 'ck1a@8', sound: 'ck1a', since: 0.25, rate: 1, cut: 1, held: null }]);
27  });
28  it('says how fast the clip plays and how much of it', () => {
29    const [fast] = starting([hap({ s: 'ck1a', speed: 1.25, end: 0.5 }, 0)], 0, words);
30    expect(fast).toMatchObject({ rate: 1.25, cut: 0.5, held: null });
31    const [clipped] = starting([hap({ s: 'ck1a', clip: 1 }, 0, 0.25)], 0, words);
32    expect(clipped.held).toBe(0.25);
33  });
34  it('starts nothing for a slice of a clip, one played backwards, or another file of the sound', () => {
35    const haps = [hap({ s: 'ck1a', begin: 0.25, end: 0.5 }, 0), hap({ s: 'ck1a', speed: -1 }, 0), hap({ s: 'ck1a', n: 3 }, 0)];
36    expect(starting(haps, 0.5, words)).toEqual([]);
37  });
38  it('is not fooled by a sound named like an object\'s own method', () => {
39    expect(starting([hap({ s: 'toString' }, 0)], 1, { ck1a: lyric })).toEqual([]);
40  });
41});