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81 lines
2.4 KiB
TypeScript
81 lines
2.4 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import {
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detectChange,
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estimateProgress,
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formatClock,
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nextDelay,
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sseEvent,
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toLive,
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type PlayerSample
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} from './now-playing';
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const track = (id: string) => ({
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spotifyId: id,
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name: `Song ${id}`,
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durationMs: 200_000,
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explicit: false,
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artists: [
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{ spotifyId: null, name: 'A' },
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{ spotifyId: null, name: 'B' }
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],
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album: {
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spotifyId: null,
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name: 'Album',
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imageUrl: 'https://i/640',
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imageUrlSmall: 'https://i/300',
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releaseDate: null
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}
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});
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const sample = (over: Partial<PlayerSample> = {}): PlayerSample => ({
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trackId: 1,
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track: track('x'),
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isPlaying: true,
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progressMs: 10_000,
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sampledAt: 1_000_000,
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...over
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});
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describe('now playing', () => {
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it('builds the public payload', () => {
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expect(toLive(sample())).toEqual({
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isPlaying: true,
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track: 'Song x',
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artists: 'A, B',
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album: 'Album',
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image: 'https://i/300',
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url: 'https://open.spotify.com/track/x',
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progressMs: 10_000,
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durationMs: 200_000,
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sampledAt: 1_000_000
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});
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expect(toLive(sample({ track: null, trackId: null }))).toMatchObject({
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isPlaying: false,
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track: null
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});
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});
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it('detects track changes, play/pause and seeks, not normal progress', () => {
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const a = sample();
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expect(detectChange(null, a).any).toBe(true);
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expect(detectChange(a, sample({ progressMs: 15_000, sampledAt: 1_005_000 })).any).toBe(false);
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expect(detectChange(a, sample({ progressMs: 90_000, sampledAt: 1_005_000 })).seek).toBe(true);
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expect(detectChange(a, sample({ isPlaying: false })).playing).toBe(true);
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expect(detectChange(a, sample({ track: track('y') })).track).toBe(true);
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});
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it('estimates progress between events and clamps to the duration', () => {
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const l = toLive(sample());
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expect(estimateProgress(l, 0, 5_000)).toBe(15_000);
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expect(estimateProgress(l, 0, 10_000_000)).toBe(200_000);
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expect(estimateProgress({ ...l, isPlaying: false }, 0, 5_000)).toBe(10_000);
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expect(formatClock(75_000)).toBe('1:15');
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});
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it('formats SSE events with the sample age, and backs off when idle', () => {
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const event = sseEvent(toLive(sample()), 1_002_000);
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expect(event.startsWith('event: now\ndata: ')).toBe(true);
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expect(event.endsWith('\n\n')).toBe(true);
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expect(JSON.parse(event.split('data: ')[1]).ageMs).toBe(2_000);
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expect(nextDelay(true, 9)).toBe(5_000);
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expect(nextDelay(false, 0)).toBe(10_000);
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expect(nextDelay(false, 50)).toBe(30_000);
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});
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});
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