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Mini Shell
Mini Shell
// 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 fs = require('fs');
const tmpdir = require('../common/tmpdir');
const filepath = tmpdir.resolve('write_pos.txt');
const cb_expected = 'write open close write open close write open close ';
let cb_occurred = '';
const fileDataInitial = 'abcdefghijklmnopqrstuvwxyz';
const fileDataExpected_1 = 'abcdefghijklmnopqrstuvwxyz';
const fileDataExpected_2 = 'abcdefghij123456qrstuvwxyz';
const fileDataExpected_3 = 'abcdefghij\u2026\u2026qrstuvwxyz';
process.on('exit', function() {
if (cb_occurred !== cb_expected) {
console.log(' Test callback events missing or out of order:');
console.log(` expected: ${cb_expected}`);
console.log(` occurred: ${cb_occurred}`);
assert.strictEqual(
cb_occurred, cb_expected,
`events missing or out of order: "${cb_occurred}" !== "${cb_expected}"`);
}
});
tmpdir.refresh();
function run_test_1() {
const options = {};
const file = fs.createWriteStream(filepath, options);
console.log(' (debug: start ', file.start);
console.log(' (debug: pos ', file.pos);
file.on('open', function(fd) {
cb_occurred += 'open ';
});
file.on('close', function() {
cb_occurred += 'close ';
console.log(' (debug: bytesWritten ', file.bytesWritten);
console.log(' (debug: start ', file.start);
console.log(' (debug: pos ', file.pos);
assert.strictEqual(file.bytesWritten, buffer.length);
const fileData = fs.readFileSync(filepath, 'utf8');
console.log(' (debug: file data ', fileData);
console.log(' (debug: expected ', fileDataExpected_1);
assert.strictEqual(fileData, fileDataExpected_1);
run_test_2();
});
file.on('error', function(err) {
cb_occurred += 'error ';
console.log(' (debug: err event ', err);
throw err;
});
const buffer = Buffer.from(fileDataInitial);
file.write(buffer);
cb_occurred += 'write ';
file.end();
}
function run_test_2() {
const buffer = Buffer.from('123456');
const options = { start: 10,
flags: 'r+' };
const file = fs.createWriteStream(filepath, options);
console.log(' (debug: start ', file.start);
console.log(' (debug: pos ', file.pos);
file.on('open', function(fd) {
cb_occurred += 'open ';
});
file.on('close', function() {
cb_occurred += 'close ';
console.log(' (debug: bytesWritten ', file.bytesWritten);
console.log(' (debug: start ', file.start);
console.log(' (debug: pos ', file.pos);
assert.strictEqual(file.bytesWritten, buffer.length);
const fileData = fs.readFileSync(filepath, 'utf8');
console.log(' (debug: file data ', fileData);
console.log(' (debug: expected ', fileDataExpected_2);
assert.strictEqual(fileData, fileDataExpected_2);
run_test_3();
});
file.on('error', function(err) {
cb_occurred += 'error ';
console.log(' (debug: err event ', err);
throw err;
});
file.write(buffer);
cb_occurred += 'write ';
file.end();
}
function run_test_3() {
const data = '\u2026\u2026'; // 3 bytes * 2 = 6 bytes in UTF-8
const options = { start: 10,
flags: 'r+' };
const file = fs.createWriteStream(filepath, options);
console.log(' (debug: start ', file.start);
console.log(' (debug: pos ', file.pos);
file.on('open', function(fd) {
cb_occurred += 'open ';
});
file.on('close', function() {
cb_occurred += 'close ';
console.log(' (debug: bytesWritten ', file.bytesWritten);
console.log(' (debug: start ', file.start);
console.log(' (debug: pos ', file.pos);
assert.strictEqual(file.bytesWritten, data.length * 3);
const fileData = fs.readFileSync(filepath, 'utf8');
console.log(' (debug: file data ', fileData);
console.log(' (debug: expected ', fileDataExpected_3);
assert.strictEqual(fileData, fileDataExpected_3);
run_test_4();
run_test_5();
});
file.on('error', function(err) {
cb_occurred += 'error ';
console.log(' (debug: err event ', err);
throw err;
});
file.write(data, 'utf8');
cb_occurred += 'write ';
file.end();
}
const run_test_4 = common.mustCall(function() {
// Error: start must be >= zero
const fn = () => {
fs.createWriteStream(filepath, { start: -5, flags: 'r+' });
};
// Verify the range of values using a common integer verifier.
// Limit Number.MAX_SAFE_INTEGER
const err = {
code: 'ERR_OUT_OF_RANGE',
message: 'The value of "start" is out of range. ' +
`It must be >= 0 && <= ${Number.MAX_SAFE_INTEGER}. Received -5`,
name: 'RangeError'
};
assert.throws(fn, err);
});
const run_test_5 = common.mustCall(function() {
// Error: start must be <= 2 ** 53 - 1
const fn = () => {
fs.createWriteStream(filepath, { start: 2 ** 53, flags: 'r+' });
};
// Verify the range of values using a common integer verifier.
// Limit Number.MAX_SAFE_INTEGER
const err = {
code: 'ERR_OUT_OF_RANGE',
message: 'The value of "start" is out of range. It must be ' +
`>= 0 && <= ${Number.MAX_SAFE_INTEGER}. ` +
'Received 9_007_199_254_740_992',
name: 'RangeError'
};
assert.throws(fn, err);
});
run_test_1();
Zerion Mini Shell 1.0