test('clearAllDownload', () => {
  testSaga(clearAllDownload)
    .next()
    .call(RNFS.readDir, FILES_FOLDER)
    .next([{ path: 'wallace' }])
    .call(Promise.all, [RNFS.unlink('wallace')])
    .next()
    .put({
      type: 'download/tracks/set',
      payload: []
    })
    .next()
    .put(actions.toastAction('success', '所有下载项目都清除成功'))
    .next()
    .isDone()
})

    console.log(err.message, err.code);
  });

// create a path you want to write to
const path = RNFS.DocumentDirectoryPath + '/test.txt';

// write the file
RNFS.writeFile(path, 'Lorem ipsum dolor sit amet', 'utf8')
  .then(() => {
    console.log('FILE WRITTEN!');
  })
  .catch((err) => {
    console.log(err.message);
  });

RNFS.unlink('path')
  .then(() => {
    console.log('FILE DELETED');
  })
  // `unlink` will throw an error, if the item to unlink does not exist
  .catch((err) => {
    console.log(err.message);
  });

const uploadUrl = 'http://requestb.in/XXXXXXX';  // For testing purposes, go to http://requestb.in/ and create your own link
// create an array of objects of the files you want to upload
const files = [
  {
    name: 'test1',
    filename: 'test1.w4a',
    filepath: RNFS.DocumentDirectoryPath + '/test1.w4a',

 .then((fileExists) => {
   if (fileExists) {
     return RNFS.unlink(uri)
   }
 })

 yield call(Promise.all, downloads.map((d) => RNFS.unlink(d.path)))