1'use strict'; 2const common = require('../common'); 3const { Writable, Readable } = require('stream'); 4 5{ 6 const writable = new Writable(); 7 writable.on('error', common.mustCall()); 8 writable.end(); 9 writable.write('h'); 10 writable.write('h'); 11} 12 13{ 14 const readable = new Readable(); 15 readable.on('error', common.mustCall()); 16 readable.push(null); 17 readable.push('h'); 18 readable.push('h'); 19} 20