'use strict'; require('../common'); const { DeflateRaw } = require('zlib'); const { Readable } = require('stream'); // validates that zlib.DeflateRaw can be inherited // with Object.setPrototypeOf function NotInitialized(options) { DeflateRaw.call(this, options); this.prop = true; } Object.setPrototypeOf(NotInitialized.prototype, DeflateRaw.prototype); Object.setPrototypeOf(NotInitialized, DeflateRaw); const dest = new NotInitialized(); const read = new Readable({ read() { this.push(Buffer.from('a test string')); this.push(null); } }); read.pipe(dest); dest.resume();