React-native-push-notification: How to setup jest test?

[anhtuank7c]

Hi,
I do setup jest test like this:

jest.mock('react-native-push-notification', () => ({
    onRegister: jest.fn(),
    onNotification: jest.fn(),
    addEventListener: jest.fn(),
    requestPermissions: jest.fn(),
}));

But when run npm test i got error:

TypeError: _reactNativePushNotification2.default.configure is not a function

So, i want to ask you correct way to setup jest test?

[JonesN3]

The configure function is called when the library initialises, so it needs to be included

```
jest.mock('react-native-push-notification', () => ({
configure: jest.fn(),
onRegister: jest.fn(),
onNotification: jest.fn(),
addEventListener: jest.fn(),
requestPermissions: jest.fn(),
}));

[b-asaf]

@JonesN7 I tried to mock 'react-native-push-notification' but I am still getting the error:
? Test suite failed to run

```
Invariant Violation: Native module cannot be null.

 at invariant (node_modules/fbjs/lib/invariant.js:44:15)
 at new NativeEventEmitter (node_modules/react-native/Libraries/EventEmitter/NativeEventEmitter.js:32:1)
 at Object.<anonymous> (node_modules/react-native/Libraries/PushNotificationIOS/PushNotificationIOS.js:18:29)
 at Object.get PushNotificationIOS [as PushNotificationIOS] (node_modules/react-native/Libraries/react-native/react-native-implementation.js:90:34)
 at Object.<anonymous> (node_modules/react-native-push-notification/component/index.ios.js:10:23)

I am using:

"react": "16.0.0-alpha.12",
"react-native": "0.45.1",
"react-native-push-notification": "^3.0.0",
"jest": "20.0.4",

and my jest configuration:

"jest": {
"preset": "react-native",
"testResultsProcessor": "jest-teamcity-reporter",
"collectCoverageFrom": [
"src/*/.js"
],
"coverageReporters": [
"html",
"text"
],
"transformIgnorePatterns": [
"node_modules/(?!(jest-)?react-native|react-navigation)"
],
"setupFiles": [
"/test/globalFetch.js",
"/__mock__/react-native-i18n.js",
"/__mock__/pushNotificationIOS.js"
]
}

my mock file `pushNotificationIOS.js` is:

const PushNotificationIOSMock = jest.mock('react-native-push-notification', () => ({
configure: jest.fn(),
onRegister: jest.fn(),
onNotification: jest.fn(),
addEventListener: jest.fn(),
requestPermissions: jest.fn(() => Promise.resolve()),
getInitialNotification: jest.fn(() => Promise.resolve()),
}));

global.PushNotificationIOS = PushNotificationIOSMock;
```

solution
I needed to change global variable from: global.PushNotificationIOS
to: global.Notification which I use in my application.