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 = require('stream').Readable;
25const assert = require('assert');
26
27const s = new Readable({
28  highWaterMark: 20,
29  encoding: 'ascii'
30});
31
32const list = ['1', '2', '3', '4', '5', '6'];
33
34s._read = function(n) {
35  const one = list.shift();
36  if (!one) {
37    s.push(null);
38  } else {
39    const two = list.shift();
40    s.push(one);
41    s.push(two);
42  }
43};
44
45s.read(0);
46
47// ACTUALLY [1, 3, 5, 6, 4, 2]
48
49process.on('exit', function() {
50  assert.strictEqual(s.readableBuffer.join(','), '1,2,3,4,5,6');
51  console.log('ok');
52});
53