1// Copyright Joyent, Inc. and other Node contributors.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the
5// "Software"), to deal in the Software without restriction, including
6// without limitation the rights to use, copy, modify, merge, publish,
7// distribute, sublicense, and/or sell copies of the Software, and to permit
8// persons to whom the Software is furnished to do so, subject to the
9// following conditions:
10//
11// The above copyright notice and this permission notice shall be included
12// in all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20// USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22'use strict';
23require('../common');
24const { Readable: R, Writable: W } = require('stream');
25const assert = require('assert');
26
27const src = new R({ encoding: 'base64' });
28const dst = new W();
29let hasRead = false;
30const accum = [];
31
32src._read = function(n) {
33  if (!hasRead) {
34    hasRead = true;
35    process.nextTick(function() {
36      src.push(Buffer.from('1'));
37      src.push(null);
38    });
39  }
40};
41
42dst._write = function(chunk, enc, cb) {
43  accum.push(chunk);
44  cb();
45};
46
47src.on('end', function() {
48  assert.strictEqual(String(Buffer.concat(accum)), 'MQ==');
49  clearTimeout(timeout);
50});
51
52src.pipe(dst);
53
54const timeout = setTimeout(function() {
55  assert.fail('timed out waiting for _write');
56}, 100);
57