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'use strict';
const common = require('../common');
const assert = require('assert');
const path = require('path');
const fs = require('fs');
const fn = path.join(common.fixturesDir, 'elipses.txt');
const rangeFile = path.join(common.fixturesDir, 'x.txt');
let paused = false;
{
const file = fs.ReadStream(fn);
file.on('open', common.mustCall(function(fd) {
file.length = 0;
assert.strictEqual(typeof fd, 'number');
assert.ok(file.readable);
// GH-535
file.pause();
file.resume();
file.pause();
file.resume();
}));
file.on('data', function(data) {
assert.ok(data instanceof Buffer);
assert.ok(!paused);
file.length += data.length;
paused = true;
file.pause();
setTimeout(function() {
paused = false;
file.resume();
}, 10);
});
file.on('end', common.mustCall());
file.on('close', common.mustCall(function() {
assert.strictEqual(file.length, 30000);
}));
}
{
const file3 = fs.createReadStream(fn, Object.create({encoding: 'utf8'}));
file3.length = 0;
file3.on('data', function(data) {
assert.strictEqual(typeof data, 'string');
file3.length += data.length;
for (let i = 0; i < data.length; i++) {
// http://www.fileformat.info/info/unicode/char/2026/index.htm
assert.strictEqual(data[i], '\u2026');
}
});
file3.on('close', common.mustCall(function() {
assert.strictEqual(file3.length, 10000);
}));
}
{
const options = Object.create({bufferSize: 1, start: 1, end: 2});
const file4 = fs.createReadStream(rangeFile, options);
assert.strictEqual(file4.start, 1);
assert.strictEqual(file4.end, 2);
let contentRead = '';
file4.on('data', function(data) {
contentRead += data.toString('utf-8');
});
file4.on('end', common.mustCall(function() {
assert.strictEqual(contentRead, 'yz');
}));
}
{
const options = Object.create({bufferSize: 1, start: 1});
const file5 = fs.createReadStream(rangeFile, options);
assert.strictEqual(file5.start, 1);
file5.data = '';
file5.on('data', function(data) {
file5.data += data.toString('utf-8');
});
file5.on('end', common.mustCall(function() {
assert.strictEqual(file5.data, 'yz\n');
}));
}
// https://github.com/joyent/node/issues/2320
{
const options = Object.create({bufferSize: 1.23, start: 1});
const file6 = fs.createReadStream(rangeFile, options);
assert.strictEqual(file6.start, 1);
file6.data = '';
file6.on('data', function(data) {
file6.data += data.toString('utf-8');
});
file6.on('end', common.mustCall(function() {
assert.strictEqual(file6.data, 'yz\n');
}));
}
{
assert.throws(function() {
fs.createReadStream(rangeFile, Object.create({start: 10, end: 2}));
}, /"start" option must be <= "end" option/);
}
{
const options = Object.create({start: 0, end: 0});
const stream = fs.createReadStream(rangeFile, options);
assert.strictEqual(stream.start, 0);
assert.strictEqual(stream.end, 0);
stream.data = '';
stream.on('data', function(chunk) {
stream.data += chunk;
});
stream.on('end', common.mustCall(function() {
assert.strictEqual(stream.data, 'x');
}));
}
// pause and then resume immediately.
{
const pauseRes = fs.createReadStream(rangeFile);
pauseRes.pause();
pauseRes.resume();
}
{
let file7 =
fs.createReadStream(rangeFile, Object.create({autoClose: false }));
assert.strictEqual(file7.autoClose, false);
file7.on('data', common.noop);
file7.on('end', common.mustCall(function() {
process.nextTick(common.mustCall(function() {
assert(!file7.closed);
assert(!file7.destroyed);
file7Next();
}));
}));
function file7Next() {
// This will tell us if the fd is usable again or not.
file7 = fs.createReadStream(null, Object.create({fd: file7.fd, start: 0 }));
file7.data = '';
file7.on('data', function(data) {
file7.data += data;
});
file7.on('end', common.mustCall(function() {
assert.strictEqual(file7.data, 'xyz\n');
}));
}
process.on('exit', function() {
assert(file7.closed);
assert(file7.destroyed);
});
}
// Just to make sure autoClose won't close the stream because of error.
{
const options = Object.create({fd: 13337, autoClose: false});
const file8 = fs.createReadStream(null, options);
file8.on('data', common.noop);
file8.on('error', common.mustCall());
process.on('exit', function() {
assert(!file8.closed);
assert(!file8.destroyed);
assert(file8.fd);
});
}
// Make sure stream is destroyed when file does not exist.
{
const file9 = fs.createReadStream('/path/to/file/that/does/not/exist');
file9.on('data', common.noop);
file9.on('error', common.mustCall());
process.on('exit', function() {
assert(!file9.closed);
assert(file9.destroyed);
});
}