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'use strict';
const common = require('../common');
const assert = require('assert');
const path = require('path');
const fs = require('fs');
var filepath = path.join(common.tmpDir, 'write_pos.txt');
const cb_expected = 'write open close write open close write open close ';
let cb_occurred = '';
var fileDataInitial = 'abcdefghijklmnopqrstuvwxyz';
var fileDataExpected_1 = 'abcdefghijklmnopqrstuvwxyz';
var fileDataExpected_2 = 'abcdefghij123456qrstuvwxyz';
var fileDataExpected_3 = 'abcdefghij\u2026\u2026qrstuvwxyz';
process.on('exit', function() {
removeTestFile();
if (cb_occurred !== cb_expected) {
console.log(' Test callback events missing or out of order:');
console.log(' expected: %j', cb_expected);
console.log(' occurred: %j', cb_occurred);
assert.strictEqual(cb_occurred, cb_expected,
'events missing or out of order: "' +
cb_occurred + '" !== "' + cb_expected + '"');
}
});
function removeTestFile() {
try {
fs.unlinkSync(filepath);
} catch (ex) { }
}
common.refreshTmpDir();
function run_test_1() {
var file, buffer, options;
options = {};
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);
var fileData = fs.readFileSync(filepath, 'utf8');
console.log(' (debug: file data ', fileData);
console.log(' (debug: expected ', fileDataExpected_1);
assert.equal(fileData, fileDataExpected_1);
run_test_2();
});
file.on('error', function(err) {
cb_occurred += 'error ';
console.log(' (debug: err event ', err);
throw err;
});
buffer = Buffer.from(fileDataInitial);
file.write(buffer);
cb_occurred += 'write ';
file.end();
}
function run_test_2() {
var file, buffer, options;
buffer = Buffer.from('123456');
options = { start: 10,
flags: 'r+' };
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);
var fileData = fs.readFileSync(filepath, 'utf8');
console.log(' (debug: file data ', fileData);
console.log(' (debug: expected ', fileDataExpected_2);
assert.equal(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() {
var file, options;
const data = '\u2026\u2026'; // 3 bytes * 2 = 6 bytes in UTF-8
options = { start: 10,
flags: 'r+' };
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.equal(fileData, fileDataExpected_3);
run_test_4();
});
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();
}
function run_test_4() {
var options;
options = { start: -5,
flags: 'r+' };
// Error: start must be >= zero
assert.throws(
function() {
file = fs.createWriteStream(filepath, options);
},
/"start" must be/
);
}
run_test_1();
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