Emulate geolocation and grant browser permissions for location-aware feature testing in Playwright

Steps

1. Create a browser context with geolocation and permissions: await browser.newContext({ geolocation: { latitude: 51.5074, longitude: -0.1278, accuracy: 100 }, permissions: ['geolocation'] })
2. Navigate to the page under test; calls to navigator.geolocation.getCurrentPosition() will return the emulated coordinates
3. To update location mid-test, call await context.setGeolocation({ latitude: 48.8566, longitude: 2.3522 })
4. To test the permission-denied flow, create the context without granting 'geolocation' and verify the app handles the error state correctly
5. For additional permissions such as notifications or camera, add them to the permissions array: ['geolocation', 'notifications']
6. Confirm the emulated coordinates are visible in the page by evaluating navigator.geolocation as a page function if needed