nodejs-mozilla/test/parallel/test-fs-write-buffer.js

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2022-07-18 11:52:00 +08:00
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const common = require('../common');
const assert = require('assert');
const path = require('path');
const fs = require('fs');
const expected = Buffer.from('hello');
const tmpdir = require('../common/tmpdir');
tmpdir.refresh();
// fs.write with all parameters provided:
{
const filename = path.join(tmpdir.path, 'write1.txt');
fs.open(filename, 'w', 0o644, common.mustCall((err, fd) => {
assert.ifError(err);
const cb = common.mustCall((err, written) => {
assert.ifError(err);
assert.strictEqual(written, expected.length);
fs.closeSync(fd);
const found = fs.readFileSync(filename, 'utf8');
assert.strictEqual(found, expected.toString());
});
fs.write(fd, expected, 0, expected.length, null, cb);
}));
}
// fs.write with a buffer, without the length parameter:
{
const filename = path.join(tmpdir.path, 'write2.txt');
fs.open(filename, 'w', 0o644, common.mustCall((err, fd) => {
assert.ifError(err);
const cb = common.mustCall((err, written) => {
assert.ifError(err);
assert.strictEqual(written, 2);
fs.closeSync(fd);
const found = fs.readFileSync(filename, 'utf8');
assert.strictEqual(found, 'lo');
});
fs.write(fd, Buffer.from('hello'), 3, cb);
}));
}
// fs.write with a buffer, without the offset and length parameters:
{
const filename = path.join(tmpdir.path, 'write3.txt');
fs.open(filename, 'w', 0o644, common.mustCall(function(err, fd) {
assert.ifError(err);
const cb = common.mustCall(function(err, written) {
assert.ifError(err);
assert.strictEqual(written, expected.length);
fs.closeSync(fd);
const found = fs.readFileSync(filename, 'utf8');
assert.deepStrictEqual(expected.toString(), found);
});
fs.write(fd, expected, cb);
}));
}
// fs.write with the offset passed as undefined followed by the callback:
{
const filename = path.join(tmpdir.path, 'write4.txt');
fs.open(filename, 'w', 0o644, common.mustCall(function(err, fd) {
assert.ifError(err);
const cb = common.mustCall(function(err, written) {
assert.ifError(err);
assert.strictEqual(written, expected.length);
fs.closeSync(fd);
const found = fs.readFileSync(filename, 'utf8');
assert.deepStrictEqual(expected.toString(), found);
});
fs.write(fd, expected, undefined, cb);
}));
}
// fs.write with offset and length passed as undefined followed by the callback:
{
const filename = path.join(tmpdir.path, 'write5.txt');
fs.open(filename, 'w', 0o644, common.mustCall((err, fd) => {
assert.ifError(err);
const cb = common.mustCall((err, written) => {
assert.ifError(err);
assert.strictEqual(written, expected.length);
fs.closeSync(fd);
const found = fs.readFileSync(filename, 'utf8');
assert.strictEqual(found, expected.toString());
});
fs.write(fd, expected, undefined, undefined, cb);
}));
}
// fs.write with a Uint8Array, without the offset and length parameters:
{
const filename = path.join(tmpdir.path, 'write6.txt');
fs.open(filename, 'w', 0o644, common.mustCall((err, fd) => {
assert.ifError(err);
const cb = common.mustCall((err, written) => {
assert.ifError(err);
assert.strictEqual(written, expected.length);
fs.closeSync(fd);
const found = fs.readFileSync(filename, 'utf8');
assert.strictEqual(found, expected.toString());
});
fs.write(fd, Uint8Array.from(expected), cb);
}));
}