1'use strict';
2
3const common = require('../common');
4
5// The following tests validate base functionality for the fs.promises
6// FileHandle.write method.
7
8const fs = require('fs');
9const { open } = fs.promises;
10const path = require('path');
11const tmpdir = require('../common/tmpdir');
12const assert = require('assert');
13const { finished } = require('stream/promises');
14const { buffer } = require('stream/consumers');
15const tmpDir = tmpdir.path;
16
17tmpdir.refresh();
18
19async function validateWrite() {
20  const filePathForHandle = path.resolve(tmpDir, 'tmp-write.txt');
21  const fileHandle = await open(filePathForHandle, 'w');
22  const buffer = Buffer.from('Hello world'.repeat(100), 'utf8');
23
24  const stream = fileHandle.createWriteStream();
25  stream.end(buffer);
26  await finished(stream);
27
28  const readFileData = fs.readFileSync(filePathForHandle);
29  assert.deepStrictEqual(buffer, readFileData);
30}
31
32async function validateRead() {
33  const filePathForHandle = path.resolve(tmpDir, 'tmp-read.txt');
34  const buf = Buffer.from('Hello world'.repeat(100), 'utf8');
35
36  fs.writeFileSync(filePathForHandle, buf);
37
38  const fileHandle = await open(filePathForHandle);
39  assert.deepStrictEqual(
40    await buffer(fileHandle.createReadStream()),
41    buf
42  );
43}
44
45Promise.all([
46  validateWrite(),
47  validateRead(),
48]).then(common.mustCall());
49