TypeError: _reactNativeLanguages.default.addEventListener is not a function in Jest - unit-testing

Question

I have completed my first react-native app. Now, I want to do unit testing and get code coverage for the whole application using jest. I have used npm packages like i18n-js, react-native-languages.
splash-test.js:
import React from 'react';
import Splash from '../Src/components/authentication/Splash';
import renderer from 'react-test-renderer';
test('renders correctly',()=>{
const tree = renderer.create(
<Splash />
).toJSON();
expect(tree).toMatchSnapshot();
})
env.js:
jest.mock('react-native-languages', () => ({
RNLanguages: {
language: 'en',
languages: ['en'],
},
}));
package.json:
{
"name": "app-name",
"version": "1.0.4",
"private": true,
"rnpm": {
"assets": [
"Src/assets/fonts/"
]
},
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start",
"test": "jest --coverage --coverageDirectory=output/coverage/jest"
},
"dependencies": {
"i18n-js": "^3.1.0",
"react": "16.6.3",
"react-native": "0.57.8",
"react-native-fast-image-zoom-viewer": "^2.3.0",
"react-native-firebase": "^5.1.1",
"react-native-gifted-chat": "^0.7.2",
"react-native-image-crop-picker": "^0.21.3",
"react-native-image-zoom-viewer": "^2.2.25",
"react-native-languages": "^3.0.1",
"react-native-material-dropdown": "^0.11.1",
"react-native-modal": "^7.0.2",
"react-native-permissions": "^1.1.1",
"react-native-progress": "^3.5.0",
"react-native-restart": "0.0.9",
"react-native-spinkit": "^1.1.1",
"react-native-swiper": "^1.5.14",
"react-native-view-toast": "0.0.1",
"react-navigation": "^3.0.8",
"react-redux": "^6.0.0",
"realm": "^2.22.0",
"redux": "^4.0.1",
"redux-thunk": "^2.3.0",
"rn-fetch-blob": "^0.10.15",
"tipsi-stripe": "^7.1.0"
},
"devDependencies": {
"babel-jest": "^23.6.0",
"jest": "^23.6.0",
"jest-junit": "^6.2.1",
"metro-react-native-babel-preset": "^0.51.0",
"react-test-renderer": "^16.6.3"
},
"jest": {
"preset": "react-native",
"transform": {
"^.+\\.(js)$": "<rootDir>/node_modules/react-native/jest/preprocessor.js"
},
"setupFiles": [
"./test/env.js"
],
"coverageReporters": [
"text"
],
"reporters": [
"default",
"jest-junit"
],
"collectCoverageFrom": [
"Src/**/*.{js,jsx}",
"!/node_modules/"
],
"transformIgnorePatterns": [
"node_modules/(?!(react-native|react-native-languages)/)"
]
},
"jest-junit": {
"output": "output/coverage/junit/junit.xml",
"usePathForSuiteName": "true"
}
}
Now, If i give npm test it throws an error as i mentioned in title. Someone tell me how to bypass all the npm modules i have used in the app.
Thanks in advance!