tts.test.ts
1,000 bytes
| 1 | import { describe, expect, it } from 'vitest' |
|---|---|
| 2 | import { selectVoice } from './tts' |
| 3 | |
| 4 | function makeVoice( |
| 5 | name: string, |
| 6 | lang: string, |
| 7 | options: { default?: boolean } = {}, |
| 8 | ): SpeechSynthesisVoice { |
| 9 | return { |
| 10 | default: options.default ?? false, |
| 11 | lang, |
| 12 | localService: true, |
| 13 | name, |
| 14 | voiceURI: `${name}-${lang}`, |
| 15 | } |
| 16 | } |
| 17 | |
| 18 | describe('selectVoice', () => { |
| 19 | it('prefers a voice matching the browser locale', () => { |
| 20 | const voices = [ |
| 21 | makeVoice('English default', 'en-US', { default: true }), |
| 22 | makeVoice('Estonian', 'et-EE'), |
| 23 | ] |
| 24 | |
| 25 | expect(selectVoice(voices, 'et-EE')?.name).toBe('Estonian') |
| 26 | }) |
| 27 | |
| 28 | it('uses a default voice when no locale matches', () => { |
| 29 | const voices = [ |
| 30 | makeVoice('German', 'de-DE'), |
| 31 | makeVoice('English default', 'en-US', { default: true }), |
| 32 | ] |
| 33 | |
| 34 | expect(selectVoice(voices, 'et-EE')?.name).toBe('English default') |
| 35 | }) |
| 36 | |
| 37 | it('returns null for an empty voice list', () => { |
| 38 | expect(selectVoice([], 'et-EE')).toBeNull() |
| 39 | }) |
| 40 | }) |
| 41 | |