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// 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 fixtures = require('../common/fixtures');
const assert = require('assert');
const fs = require('fs');
const filepath = fixtures.path('x.txt');
const fd = fs.openSync(filepath, 'r');
const expected = Buffer.from('xyz\n');
function test(bufferAsync, bufferSync, expected) {
fs.read(fd,
bufferAsync,
0,
expected.length,
0,
common.mustCall((err, bytesRead) => {
assert.ifError(err);
assert.strictEqual(bytesRead, expected.length);
assert.deepStrictEqual(bufferAsync, expected);
}));
const r = fs.readSync(fd, bufferSync, 0, expected.length, 0);
assert.deepStrictEqual(bufferSync, expected);
assert.strictEqual(r, expected.length);
}
test(Buffer.allocUnsafe(expected.length),
Buffer.allocUnsafe(expected.length),
expected);
test(new Uint8Array(expected.length),
new Uint8Array(expected.length),
Uint8Array.from(expected));
{
// Reading beyond file length (3 in this case) should return no data.
// This is a test for a bug where reads > uint32 would return data
// from the current position in the file.
const pos = 0xffffffff + 1; // max-uint32 + 1
const nRead = fs.readSync(fd, Buffer.alloc(1), 0, 1, pos);
assert.strictEqual(nRead, 0);
fs.read(fd, Buffer.alloc(1), 0, 1, pos, common.mustCall((err, nRead) => {
assert.ifError(err);
assert.strictEqual(nRead, 0);
}));
}
assert.throws(
() => fs.read(fd, Buffer.alloc(1), 0, 1, 0),
{
message: 'Callback must be a function. Received undefined',
code: 'ERR_INVALID_CALLBACK',
}
);
assert.throws(
() => fs.read(null, Buffer.alloc(1), 0, 1, 0),
{
message: 'The "fd" argument must be of type number. Received type object',
code: 'ERR_INVALID_ARG_TYPE',
}
);