deno.land / std@0.166.0 / node / _tools / test / parallel / test-fs-read-stream.js
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/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');const tmpdir = require('../common/tmpdir');
const child_process = require('child_process');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');
function test1(options) { let paused = false; let bytesRead = 0;
const file = fs.createReadStream(fn, options); const fileSize = fs.statSync(fn).size;
assert.strictEqual(file.bytesRead, 0);
file.on('open', common.mustCall(function(fd) { file.length = 0; assert.strictEqual(typeof fd, 'number'); assert.strictEqual(file.bytesRead, 0); 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(data.byteOffset % 8 === 0); assert.ok(!paused); file.length += data.length;
bytesRead += data.length; assert.strictEqual(file.bytesRead, bytesRead);
paused = true; file.pause();
setTimeout(function() { paused = false; file.resume(); }, 10); });
file.on('end', common.mustCall(function(chunk) { assert.strictEqual(bytesRead, fileSize); assert.strictEqual(file.bytesRead, fileSize); }));
file.on('close', common.mustCall(function() { assert.strictEqual(bytesRead, fileSize); assert.strictEqual(file.bytesRead, fileSize); }));
process.on('exit', function() { assert.strictEqual(file.length, 30000); });}
test1({});test1({ fs: { open: common.mustCall(fs.open), read: common.mustCallAtLeast(fs.read, 1), close: common.mustCall(fs.close), }});
{ const file = fs.createReadStream(fn, common.mustNotMutateObjectDeep({ 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());
process.on('exit', function() { assert.strictEqual(file.length, 10000); });}
{ const file = fs.createReadStream(rangeFile, common.mustNotMutateObjectDeep({ bufferSize: 1, start: 1, end: 2 })); let contentRead = ''; file.on('data', function(data) { contentRead += data.toString('utf-8'); }); file.on('end', common.mustCall(function(data) { assert.strictEqual(contentRead, 'yz'); }));}
{ const file = fs.createReadStream(rangeFile, common.mustNotMutateObjectDeep({ bufferSize: 1, 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'); }));}
{ // Ref: https://github.com/nodejs/node-v0.x-archive/issues/2320 const file = fs.createReadStream(rangeFile, common.mustNotMutateObjectDeep({ bufferSize: 1.23, 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'); }));}
assert.throws( () => { fs.createReadStream(rangeFile, common.mustNotMutateObjectDeep({ start: 10, end: 2 })); }, { code: 'ERR_OUT_OF_RANGE', message: 'The value of "start" is out of range. It must be <= "end"' + ' (here: 2). Received 10', name: 'RangeError' });
{ const stream = fs.createReadStream(rangeFile, common.mustNotMutateObjectDeep({ start: 0, end: 0 })); stream.data = '';
stream.on('data', function(chunk) { stream.data += chunk; });
stream.on('end', common.mustCall(function() { assert.strictEqual(stream.data, 'x'); }));}
{ // Verify that end works when start is not specified. const stream = new fs.createReadStream(rangeFile, common.mustNotMutateObjectDeep({ end: 1 })); stream.data = '';
stream.on('data', function(chunk) { stream.data += chunk; });
stream.on('end', common.mustCall(function() { assert.strictEqual(stream.data, 'xy'); }));}
if (!common.isWindows) { // Verify that end works when start is not specified, and we do not try to // use positioned reads. This makes sure that this keeps working for // non-seekable file descriptors. tmpdir.refresh(); const filename = `${tmpdir.path}/foo.pipe`; const mkfifoResult = child_process.spawnSync('mkfifo', [filename]); if (!mkfifoResult.error) { child_process.exec(`echo "xyz foobar" > '${filename}'`); const stream = new fs.createReadStream(filename, common.mustNotMutateObjectDeep({ end: 1 })); stream.data = '';
stream.on('data', function(chunk) { stream.data += chunk; });
stream.on('end', common.mustCall(function() { assert.strictEqual(stream.data, 'xy'); fs.unlinkSync(filename); })); } else { common.printSkipMessage('mkfifo not available'); }}
{ // Pause and then resume immediately. const pauseRes = fs.createReadStream(rangeFile); pauseRes.pause(); pauseRes.resume();}
{ let file = fs.createReadStream(rangeFile, common.mustNotMutateObjectDeep({ autoClose: false })); let data = ''; file.on('data', function(chunk) { data += chunk; }); file.on('end', common.mustCall(function() { assert.strictEqual(data, 'xyz\n'); process.nextTick(function() { assert(!file.closed); assert(!file.destroyed); fileNext(); }); }));
function fileNext() { // This will tell us if the fd is usable again or not. file = fs.createReadStream(null, common.mustNotMutateObjectDeep({ fd: file.fd, start: 0 })); file.data = ''; file.on('data', function(data) { file.data += data; }); file.on('end', common.mustCall(function(err) { 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 file = fs.createReadStream(null, common.mustNotMutateObjectDeep({ fd: 13337, autoClose: false })); 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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