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 assert = require('assert');
25const path = require('path');
26const fs = require('fs');
27const tmpdir = require('../common/tmpdir');
28const filename = path.join(tmpdir.path, 'write.txt');
29
30tmpdir.refresh();
31
32{
33  const parameters = [Buffer.from('bár'), 0, Buffer.byteLength('bár')];
34
35  // The first time fs.writeSync is called with all parameters provided.
36  // After that, each pop in the cycle removes the final parameter. So:
37  // - The 2nd time fs.writeSync with a buffer, without the length parameter.
38  // - The 3rd time fs.writeSync with a buffer, without the offset and length
39  //   parameters.
40  while (parameters.length > 0) {
41    const fd = fs.openSync(filename, 'w');
42
43    let written = fs.writeSync(fd, '');
44    assert.strictEqual(written, 0);
45
46    fs.writeSync(fd, 'foo');
47
48    written = fs.writeSync(fd, ...parameters);
49    assert.ok(written > 3);
50    fs.closeSync(fd);
51
52    assert.strictEqual(fs.readFileSync(filename, 'utf-8'), 'foobár');
53
54    parameters.pop();
55  }
56}
57