1'use strict';
2const common = require('../common');
3
4const assert = require('assert');
5const { Writable } = require('stream');
6
7const bufferBlerg = Buffer.from('blerg');
8const w = new Writable();
9
10assert.throws(
11  () => {
12    w.end(bufferBlerg);
13  },
14  {
15    name: 'Error',
16    code: 'ERR_METHOD_NOT_IMPLEMENTED',
17    message: 'The _write() method is not implemented'
18  }
19);
20
21const _write = common.mustCall((chunk, _, next) => {
22  next();
23});
24
25const _writev = common.mustCall((chunks, next) => {
26  assert.strictEqual(chunks.length, 2);
27  next();
28});
29
30const w2 = new Writable({ write: _write, writev: _writev });
31
32assert.strictEqual(w2._write, _write);
33assert.strictEqual(w2._writev, _writev);
34
35w2.write(bufferBlerg);
36
37w2.cork();
38w2.write(bufferBlerg);
39w2.write(bufferBlerg);
40
41w2.end();
42