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denoland-deno/tests/node_compat/test/parallel/test-fs-readfile-zero-byte-liar.js

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// deno-fmt-ignore-file
// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 20.11.1
// This file is automatically generated by `tests/node_compat/runner/setup.ts`. Do not modify this file manually.
// 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');
// Test that readFile works even when stat returns size 0.
const assert = require('assert');
const fs = require('fs');
const dataExpected = fs.readFileSync(__filename, 'utf8');
// Sometimes stat returns size=0, but it's a lie.
fs._fstat = fs.fstat;
fs._fstatSync = fs.fstatSync;
fs.fstat = (fd, cb) => {
fs._fstat(fd, (er, st) => {
if (er) return cb(er);
st.size = 0;
return cb(er, st);
});
};
fs.fstatSync = (fd) => {
const st = fs._fstatSync(fd);
st.size = 0;
return st;
};
const d = fs.readFileSync(__filename, 'utf8');
assert.strictEqual(d, dataExpected);
fs.readFile(__filename, 'utf8', common.mustCall((er, d) => {
assert.strictEqual(d, dataExpected);
}));