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';
23const {
24  mustCall,
25  mustCallAtLeast,
26} = require('../common');
27const assert = require('assert');
28const debug = require('util').debuglog('test');
29
30let bufsize = 0;
31
32switch (process.argv[2]) {
33  case undefined:
34    return parent();
35  case 'child':
36    return child();
37  default:
38    throw new Error('invalid');
39}
40
41function parent() {
42  const spawn = require('child_process').spawn;
43  const child = spawn(process.execPath, [__filename, 'child']);
44  let sent = 0;
45
46  let n = '';
47  child.stdout.setEncoding('ascii');
48  child.stdout.on('data', mustCallAtLeast((c) => {
49    n += c;
50  }));
51  child.stdout.on('end', mustCall(() => {
52    assert.strictEqual(+n, sent);
53    debug('ok');
54  }));
55
56  // Write until the buffer fills up.
57  let buf;
58  do {
59    bufsize += 1024;
60    buf = Buffer.alloc(bufsize, '.');
61    sent += bufsize;
62  } while (child.stdin.write(buf));
63
64  // Then write a bunch more times.
65  for (let i = 0; i < 100; i++) {
66    const buf = Buffer.alloc(bufsize, '.');
67    sent += bufsize;
68    child.stdin.write(buf);
69  }
70
71  // Now end, before it's all flushed.
72  child.stdin.end();
73
74  // now we wait...
75}
76
77function child() {
78  let received = 0;
79  process.stdin.on('data', mustCallAtLeast((c) => {
80    received += c.length;
81  }));
82  process.stdin.on('end', mustCall(() => {
83    // This console.log is part of the test.
84    console.log(received);
85  }));
86}
87