web-speech-profanity/packages/component/src/SpeechServices/TextToSpeech/fetchVoices.spec.js

Web Speech API adapter to use Cognitive Services Speech Services for both speech-to-text and text-to-speech service.

import fetchVoices from './fetchVoices';

let originalFetch;

beforeEach(() => {
  originalFetch = global.fetch;
});

afterEach(() => {
  global.fetch = originalFetch;
});

describe('Fetch voices', () => {
  test('happy path', async () => {
    global.fetch = jest.fn(async () => ({
      json: async () => [
        {
          Name: 'Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)',
          ShortName: 'en-US-AriaNeural',
          Gender: 'Female',
          Locale: 'en-US'
        }
      ],
      ok: true
    }));

    const voices = await fetchVoices({ authorizationToken: 'AUTHORIZATION_TOKEN', region: 'westus' });
    const [firstVoice] = voices;

    expect(firstVoice).toHaveProperty('gender', 'Female');
    expect(firstVoice).toHaveProperty('lang', 'en-US');
    expect(firstVoice).toHaveProperty('name', 'Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)');

    expect(global.fetch).toHaveBeenCalledTimes(1);
    expect(global.fetch).toHaveBeenCalledWith('https://westus.tts.speech.microsoft.com/cognitiveservices/voices/list', {
      headers: {
        authorization: 'Bearer AUTHORIZATION_TOKEN',
        'content-type': 'application/json'
      }
    });
  });

  test('with network error', async () => {
    global.fetch = jest.fn(async () => ({ ok: false }));

    expect(fetchVoices({ authorizationToken: 'AUTHORIZATION_TOKEN', region: 'westus' })).rejects.toThrow(
      'Failed to fetch voices'
    );
  });
});