rn-fetch-blob/test/test-blob.js

import RNTest from './react-native-testkit/'
import React from 'react'
import RNFetchBlob from 'react-native-fetch-blob'
import Timer from 'react-timer-mixin'

import {
  StyleSheet,
  Text,
  View,
  ScrollView,
  CameraRoll,
  Platform,
  Dimensions,
  Image,
} from 'react-native';

const fs = RNFetchBlob.fs
const Blob = RNFetchBlob.polyfill.Blob

const { Assert, Comparer, Info, prop } = RNTest
const describe = RNTest.config({
  group : 'Blob',
  run : true,
  expand : true,
  timeout : 20000,
})
const { TEST_SERVER_URL, TEST_SERVER_URL_SSL, DROPBOX_TOKEN, styles } = prop()
const  dirs = RNFetchBlob.fs.dirs

let prefix = ((Platform.OS === 'android') ? 'file://' : '')
let file = RNTest.prop('image')