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101 lines
2.6 KiB
JavaScript
101 lines
2.6 KiB
JavaScript
// deno-fmt-ignore-file
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// deno-lint-ignore-file
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.
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// Taken from Node 20.11.1
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// This file is automatically generated by `tests/node_compat/runner/setup.ts`. Do not modify this file manually.
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'use strict';
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const common = require('../common');
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// Test fs.readFile using a file descriptor.
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const fixtures = require('../common/fixtures');
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const assert = require('assert');
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const fs = require('fs');
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const fn = fixtures.path('empty.txt');
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const tmpdir = require('../common/tmpdir');
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tmpdir.refresh();
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tempFd(function(fd, close) {
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fs.readFile(fd, function(err, data) {
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assert.ok(data);
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close();
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});
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});
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tempFd(function(fd, close) {
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fs.readFile(fd, 'utf8', function(err, data) {
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assert.strictEqual(data, '');
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close();
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});
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});
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tempFdSync(function(fd) {
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assert.ok(fs.readFileSync(fd));
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});
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tempFdSync(function(fd) {
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assert.strictEqual(fs.readFileSync(fd, 'utf8'), '');
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});
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function tempFd(callback) {
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fs.open(fn, 'r', function(err, fd) {
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assert.ifError(err);
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callback(fd, function() {
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fs.close(fd, function(err) {
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assert.ifError(err);
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});
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});
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});
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}
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function tempFdSync(callback) {
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const fd = fs.openSync(fn, 'r');
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callback(fd);
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fs.closeSync(fd);
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}
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{
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// This test makes sure that `readFile()` always reads from the current
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// position of the file, instead of reading from the beginning of the file,
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// when used with file descriptors.
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const filename = tmpdir.resolve('test.txt');
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fs.writeFileSync(filename, 'Hello World');
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{
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// Tests the fs.readFileSync().
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const fd = fs.openSync(filename, 'r');
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// Read only five bytes, so that the position moves to five.
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const buf = Buffer.alloc(5);
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assert.strictEqual(fs.readSync(fd, buf, 0, 5), 5);
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assert.strictEqual(buf.toString(), 'Hello');
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// readFileSync() should read from position five, instead of zero.
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assert.strictEqual(fs.readFileSync(fd).toString(), ' World');
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fs.closeSync(fd);
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}
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{
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// Tests the fs.readFile().
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fs.open(filename, 'r', common.mustSucceed((fd) => {
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const buf = Buffer.alloc(5);
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// Read only five bytes, so that the position moves to five.
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fs.read(fd, buf, 0, 5, null, common.mustSucceed((bytes) => {
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assert.strictEqual(bytes, 5);
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assert.strictEqual(buf.toString(), 'Hello');
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fs.readFile(fd, common.mustSucceed((data) => {
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// readFile() should read from position five, instead of zero.
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assert.strictEqual(data.toString(), ' World');
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fs.closeSync(fd);
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}));
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}));
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}));
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}
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}
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