# PWAs को Test करना — Progressive Web Apps

Source: https://www.geekswithgeeks.com/hi/pwa/pwa-testing

> Service workers, offline functionality और installation flow को test करें।

## Testing Strategies

PWAs को test करें: offline behavior, service worker updates, caching correctness, real devices पर installation और accessibility। Chrome DevTools, Lighthouse और manual testing का उपयोग करें।

## Service worker को unit test करें

Jest या Vitest के साथ service worker को test करें।

```javascript
describe('Service Worker', () => {
  it('should cache on install', async () => {
    const cache = await caches.open('v1');
    await cache.add('/index.html');
    const cached = await cache.match('/index.html');
    expect(cached).toBeDefined();
  });

  it('should serve from cache on fetch', async () => {
    // Mock fetch event
    const response = await cache.match('/index.html');
    expect(response).toBeDefined();
  });
});
```

Output:

```
Service worker caching and fetch behavior verified through tests.
```

## एक आम गलती

हमेशा real devices पर real network conditions में test करें। Simulator throttling और localhost testing real-world issues को miss करते हैं।