text: 'use strict';
  
  const fileReader = require('./lib/reader.js');
  
  // Obtain and assert input
  let files = process.argv.slice(2);
  console.log(files);
  
  if( ! (files instanceof Array && files.length) ) {
    throw new Error('Invalid Args');
  }
  
  fileReader(files, (err,data) => {
    if ( err ) { throw err; }
    console.log('From Callback:', data);
  });
  