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'use strict';
const common = require('../common');
const assert = require('assert');
const fs = require('fs');
const fixtures = require('../common/fixtures');
const fn = fixtures.path('elipses.txt');
const rangeFile = fixtures.path('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', common.mustCallAtLeast(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 file = fs.createReadStream(fn, Object.create({ encoding: 'utf8' }));
file.length = 0;
file.on('data', function(data) {
assert.strictEqual(typeof data, 'string');
file.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');
}
});
file.on('close', common.mustCall(function() {
assert.strictEqual(file.length, 10000);
}));
}
{
const options = Object.create({ bufferSize: 1, start: 1, end: 2 });
const file = fs.createReadStream(rangeFile, options);
assert.strictEqual(file.start, 1);
assert.strictEqual(file.end, 2);
let contentRead = '';
file.on('data', function(data) {
contentRead += data.toString('utf-8');
});
file.on('end', common.mustCall(function() {
assert.strictEqual(contentRead, 'yz');
}));
}
{
const options = Object.create({ bufferSize: 1, start: 1 });
const file = fs.createReadStream(rangeFile, options);
assert.strictEqual(file.start, 1);
file.data = '';
file.on('data', function(data) {
file.data += data.toString('utf-8');
});
file.on('end', common.mustCall(function() {
assert.strictEqual(file.data, 'yz\n');
}));
}
// https://github.com/joyent/node/issues/2320
{
const options = Object.create({ bufferSize: 1.23, start: 1 });
const file = fs.createReadStream(rangeFile, options);
assert.strictEqual(file.start, 1);
file.data = '';
file.on('data', function(data) {
file.data += data.toString('utf-8');
});
file.on('end', common.mustCall(function() {
assert.strictEqual(file.data, 'yz\n');
}));
}
{
const message =
'The value of "start" is out of range. It must be <= "end" (here: 2).' +
' Received 10';
common.expectsError(
() => {
fs.createReadStream(rangeFile, Object.create({ start: 10, end: 2 }));
},
{
code: 'ERR_OUT_OF_RANGE',
message,
type: RangeError
});
}
{
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 data = '';
let file =
fs.createReadStream(rangeFile, Object.create({ autoClose: false }));
assert.strictEqual(file.autoClose, false);
file.on('data', (chunk) => { data += chunk; });
file.on('end', common.mustCall(function() {
process.nextTick(common.mustCall(function() {
assert(!file.closed);
assert(!file.destroyed);
assert.strictEqual(data, 'xyz\n');
fileNext();
}));
}));
function fileNext() {
// This will tell us if the fd is usable again or not.
file = fs.createReadStream(null, Object.create({ fd: file.fd, start: 0 }));
file.data = '';
file.on('data', function(data) {
file.data += data;
});
file.on('end', common.mustCall(function() {
assert.strictEqual(file.data, 'xyz\n');
}));
}
process.on('exit', function() {
assert(file.closed);
assert(file.destroyed);
});
}
// Just to make sure autoClose won't close the stream because of error.
{
const options = Object.create({ fd: 13337, autoClose: false });
const file = fs.createReadStream(null, options);
file.on('data', common.mustNotCall());
file.on('error', common.mustCall());
process.on('exit', function() {
assert(!file.closed);
assert(!file.destroyed);
assert(file.fd);
});
}
// Make sure stream is destroyed when file does not exist.
{
const file = fs.createReadStream('/path/to/file/that/does/not/exist');
file.on('data', common.mustNotCall());
file.on('error', common.mustCall());
process.on('exit', function() {
assert(!file.closed);
assert(file.destroyed);
});
}
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