test/parallel/test-zlib-deflate-raw-inherits.js


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'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();