index.ios.js

import React, { Component } from 'react';
import { Navigation } from 'react-native-navigation';
import { Text, View } from 'react-native';


Navigation.registerComponent('FirstTabScreen', () => <View><Text>Screen 1</Text></View>);
Navigation.registerComponent('SecondTabScreen', () => <View><Text>Screen 2</Text></View>);

Navigation.startTabBasedApp({
  tabs: [
    {
      label: 'One',
      screen: 'FirstTabScreen',
      title: 'Screen One'
    },
    {
      label: 'Two',
      screen: 'SecondTabScreen',
      title: 'Screen Two'
    }
  ]
});

package.json

{
  "name": "ReactNativeTest",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "react": "15.3.2",
    "react-native": "0.36.1",
    "react-native-navigation": "^1.0.30"
  },
  "jest": {
    "preset": "jest-react-native"
  },
  "devDependencies": {
    "babel-jest": "16.0.0",
    "babel-preset-react-native": "1.9.0",
    "jest": "16.0.2",
    "jest-react-native": "16.0.0",
    "react-test-renderer": "15.3.2"
  }
}

> npm -v
3.10.8