deno.land / std@0.166.0 / node / _tools / test / parallel / test-buffer-alloc.js
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 16.13.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';const common = require('../common');
const assert = require('assert');const vm = require('vm');
const SlowBuffer = require('buffer').SlowBuffer;
// Verify the maximum Uint8Array size. There is no concrete limit by spec. The// internal limits should be updated if this fails.assert.throws( () => new Uint8Array(2 ** 32 + 1), { message: 'Invalid typed array length: 4294967297' });
const b = Buffer.allocUnsafe(1024);assert.strictEqual(b.length, 1024);
b[0] = -1;assert.strictEqual(b[0], 255);
for (let i = 0; i < 1024; i++) { b[i] = i % 256;}
for (let i = 0; i < 1024; i++) { assert.strictEqual(i % 256, b[i]);}
const c = Buffer.allocUnsafe(512);assert.strictEqual(c.length, 512);
const d = Buffer.from([]);assert.strictEqual(d.length, 0);
// Test offset properties{ const b = Buffer.alloc(128); assert.strictEqual(b.length, 128); assert.strictEqual(b.byteOffset, 0); assert.strictEqual(b.offset, 0);}
// Test creating a Buffer from a Uint32Array{ const ui32 = new Uint32Array(4).fill(42); const e = Buffer.from(ui32); for (const [index, value] of e.entries()) { assert.strictEqual(value, ui32[index]); }}// Test creating a Buffer from a Uint32Array (old constructor){ const ui32 = new Uint32Array(4).fill(42); const e = Buffer(ui32); for (const [key, value] of e.entries()) { assert.deepStrictEqual(value, ui32[key]); }}
// Test invalid encoding for Buffer.toStringassert.throws(() => b.toString('invalid'), /Unknown encoding: invalid/);// Invalid encoding for Buffer.writeassert.throws(() => b.write('test string', 0, 5, 'invalid'), /Unknown encoding: invalid/);// Unsupported arguments for Buffer.writeassert.throws(() => b.write('test', 'utf8', 0), { code: 'ERR_INVALID_ARG_TYPE' });
// Try to create 0-length buffers. Should not throw.Buffer.from('');Buffer.from('', 'ascii');Buffer.from('', 'latin1');Buffer.alloc(0);Buffer.allocUnsafe(0);new Buffer('');new Buffer('', 'ascii');new Buffer('', 'latin1');new Buffer('', 'binary');Buffer(0);
const outOfRangeError = { code: 'ERR_OUT_OF_RANGE', name: 'RangeError'};
// Try to write a 0-length string beyond the end of bassert.throws(() => b.write('', 2048), outOfRangeError);
// Throw when writing to negative offsetassert.throws(() => b.write('a', -1), outOfRangeError);
// Throw when writing past bounds from the poolassert.throws(() => b.write('a', 2048), outOfRangeError);
// Throw when writing to negative offsetassert.throws(() => b.write('a', -1), outOfRangeError);
// Try to copy 0 bytes worth of data into an empty bufferb.copy(Buffer.alloc(0), 0, 0, 0);
// Try to copy 0 bytes past the end of the target bufferb.copy(Buffer.alloc(0), 1, 1, 1);b.copy(Buffer.alloc(1), 1, 1, 1);
// Try to copy 0 bytes from past the end of the source bufferb.copy(Buffer.alloc(1), 0, 2048, 2048);
// Testing for smart defaults and ability to pass string values as offset{ const writeTest = Buffer.from('abcdes'); writeTest.write('n', 'ascii'); assert.throws( () => writeTest.write('o', '1', 'ascii'), { code: 'ERR_INVALID_ARG_TYPE' } ); writeTest.write('o', 1, 'ascii'); writeTest.write('d', 2, 'ascii'); writeTest.write('e', 3, 'ascii'); writeTest.write('j', 4, 'ascii'); assert.strictEqual(writeTest.toString(), 'nodejs');}
// Offset points to the end of the buffer and does not throw.// (see https://github.com/nodejs/node/issues/8127).Buffer.alloc(1).write('', 1, 0);
// ASCII slice test{ const asciiString = 'hello world';
for (let i = 0; i < asciiString.length; i++) { b[i] = asciiString.charCodeAt(i); } const asciiSlice = b.toString('ascii', 0, asciiString.length); assert.strictEqual(asciiString, asciiSlice);}
{ const asciiString = 'hello world'; const offset = 100;
assert.strictEqual(asciiString.length, b.write(asciiString, offset, 'ascii')); const asciiSlice = b.toString('ascii', offset, offset + asciiString.length); assert.strictEqual(asciiString, asciiSlice);}
{ const asciiString = 'hello world'; const offset = 100;
const sliceA = b.slice(offset, offset + asciiString.length); const sliceB = b.slice(offset, offset + asciiString.length); for (let i = 0; i < asciiString.length; i++) { assert.strictEqual(sliceA[i], sliceB[i]); }}
// UTF-8 slice test{ const utf8String = '¡hέlló wôrld!'; const offset = 100;
b.write(utf8String, 0, Buffer.byteLength(utf8String), 'utf8'); let utf8Slice = b.toString('utf8', 0, Buffer.byteLength(utf8String)); assert.strictEqual(utf8String, utf8Slice);
assert.strictEqual(Buffer.byteLength(utf8String), b.write(utf8String, offset, 'utf8')); utf8Slice = b.toString('utf8', offset, offset + Buffer.byteLength(utf8String)); assert.strictEqual(utf8String, utf8Slice);
const sliceA = b.slice(offset, offset + Buffer.byteLength(utf8String)); const sliceB = b.slice(offset, offset + Buffer.byteLength(utf8String)); for (let i = 0; i < Buffer.byteLength(utf8String); i++) { assert.strictEqual(sliceA[i], sliceB[i]); }}
{ const slice = b.slice(100, 150); assert.strictEqual(slice.length, 50); for (let i = 0; i < 50; i++) { assert.strictEqual(b[100 + i], slice[i]); }}
{ // Make sure only top level parent propagates from allocPool const b = Buffer.allocUnsafe(5); const c = b.slice(0, 4); const d = c.slice(0, 2); assert.strictEqual(b.parent, c.parent); assert.strictEqual(b.parent, d.parent);}
{ // Also from a non-pooled instance const b = Buffer.allocUnsafeSlow(5); const c = b.slice(0, 4); const d = c.slice(0, 2); assert.strictEqual(c.parent, d.parent);}
{ // Bug regression test const testValue = '\u00F6\u65E5\u672C\u8A9E'; // ö日本語 const buffer = Buffer.allocUnsafe(32); const size = buffer.write(testValue, 0, 'utf8'); const slice = buffer.toString('utf8', 0, size); assert.strictEqual(slice, testValue);}
{ // Test triple slice const a = Buffer.allocUnsafe(8); for (let i = 0; i < 8; i++) a[i] = i; const b = a.slice(4, 8); assert.strictEqual(b[0], 4); assert.strictEqual(b[1], 5); assert.strictEqual(b[2], 6); assert.strictEqual(b[3], 7); const c = b.slice(2, 4); assert.strictEqual(c[0], 6); assert.strictEqual(c[1], 7);}
{ const d = Buffer.from([23, 42, 255]); assert.strictEqual(d.length, 3); assert.strictEqual(d[0], 23); assert.strictEqual(d[1], 42); assert.strictEqual(d[2], 255); assert.deepStrictEqual(d, Buffer.from(d));}
{ // Test for proper UTF-8 Encoding const e = Buffer.from('über'); assert.deepStrictEqual(e, Buffer.from([195, 188, 98, 101, 114]));}
{ // Test for proper ascii Encoding, length should be 4 const f = Buffer.from('über', 'ascii'); assert.deepStrictEqual(f, Buffer.from([252, 98, 101, 114]));}
['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach((encoding) => { { // Test for proper UTF16LE encoding, length should be 8 const f = Buffer.from('über', encoding); assert.deepStrictEqual(f, Buffer.from([252, 0, 98, 0, 101, 0, 114, 0])); }
{ // Length should be 12 const f = Buffer.from('привет', encoding); assert.deepStrictEqual( f, Buffer.from([63, 4, 64, 4, 56, 4, 50, 4, 53, 4, 66, 4]) ); assert.strictEqual(f.toString(encoding), 'привет'); }
{ const f = Buffer.from([0, 0, 0, 0, 0]); assert.strictEqual(f.length, 5); const size = f.write('あいうえお', encoding); assert.strictEqual(size, 4); assert.deepStrictEqual(f, Buffer.from([0x42, 0x30, 0x44, 0x30, 0x00])); }});
{ const f = Buffer.from('\uD83D\uDC4D', 'utf-16le'); // THUMBS UP SIGN (U+1F44D) assert.strictEqual(f.length, 4); assert.deepStrictEqual(f, Buffer.from('3DD84DDC', 'hex'));}
// Test construction from arrayish object{ const arrayIsh = { 0: 0, 1: 1, 2: 2, 3: 3, length: 4 }; let g = Buffer.from(arrayIsh); assert.deepStrictEqual(g, Buffer.from([0, 1, 2, 3])); const strArrayIsh = { 0: '0', 1: '1', 2: '2', 3: '3', length: 4 }; g = Buffer.from(strArrayIsh); assert.deepStrictEqual(g, Buffer.from([0, 1, 2, 3]));}
//// Test toString('base64')//assert.strictEqual((Buffer.from('Man')).toString('base64'), 'TWFu');assert.strictEqual((Buffer.from('Woman')).toString('base64'), 'V29tYW4=');
//// Test toString('base64url')//assert.strictEqual((Buffer.from('Man')).toString('base64url'), 'TWFu');assert.strictEqual((Buffer.from('Woman')).toString('base64url'), 'V29tYW4');
{ // Test that regular and URL-safe base64 both work both ways const expected = [0xff, 0xff, 0xbe, 0xff, 0xef, 0xbf, 0xfb, 0xef, 0xff]; assert.deepStrictEqual(Buffer.from('//++/++/++//', 'base64'), Buffer.from(expected)); assert.deepStrictEqual(Buffer.from('__--_--_--__', 'base64'), Buffer.from(expected)); assert.deepStrictEqual(Buffer.from('//++/++/++//', 'base64url'), Buffer.from(expected)); assert.deepStrictEqual(Buffer.from('__--_--_--__', 'base64url'), Buffer.from(expected));}
const base64flavors = ['base64', 'base64url'];
{ // Test that regular and URL-safe base64 both work both ways with padding const expected = [0xff, 0xff, 0xbe, 0xff, 0xef, 0xbf, 0xfb, 0xef, 0xff, 0xfb]; assert.deepStrictEqual(Buffer.from('//++/++/++//+w==', 'base64'), Buffer.from(expected)); assert.deepStrictEqual(Buffer.from('//++/++/++//+w==', 'base64'), Buffer.from(expected)); assert.deepStrictEqual(Buffer.from('//++/++/++//+w==', 'base64url'), Buffer.from(expected)); assert.deepStrictEqual(Buffer.from('//++/++/++//+w==', 'base64url'), Buffer.from(expected));}
{ // big example const quote = 'Man is distinguished, not only by his reason, but by this ' + 'singular passion from other animals, which is a lust ' + 'of the mind, that by a perseverance of delight in the ' + 'continued and indefatigable generation of knowledge, ' + 'exceeds the short vehemence of any carnal pleasure.'; const expected = 'TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb' + '24sIGJ1dCBieSB0aGlzIHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlci' + 'BhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2YgdGhlIG1pbmQsIHRoYXQ' + 'gYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu' + 'dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZ' + 'GdlLCBleGNlZWRzIHRoZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm' + '5hbCBwbGVhc3VyZS4='; assert.strictEqual(Buffer.from(quote).toString('base64'), expected); assert.strictEqual( Buffer.from(quote).toString('base64url'), expected.replaceAll('+', '-').replaceAll('/', '_').replaceAll('=', '') );
base64flavors.forEach((encoding) => { let b = Buffer.allocUnsafe(1024); let bytesWritten = b.write(expected, 0, encoding); assert.strictEqual(quote.length, bytesWritten); assert.strictEqual(quote, b.toString('ascii', 0, quote.length));
// Check that the base64 decoder ignores whitespace const expectedWhite = `${expected.slice(0, 60)} \n` + `${expected.slice(60, 120)} \n` + `${expected.slice(120, 180)} \n` + `${expected.slice(180, 240)} \n` + `${expected.slice(240, 300)}\n` + `${expected.slice(300, 360)}\n`; b = Buffer.allocUnsafe(1024); bytesWritten = b.write(expectedWhite, 0, encoding); assert.strictEqual(quote.length, bytesWritten); assert.strictEqual(quote, b.toString('ascii', 0, quote.length));
// Check that the base64 decoder on the constructor works // even in the presence of whitespace. b = Buffer.from(expectedWhite, encoding); assert.strictEqual(quote.length, b.length); assert.strictEqual(quote, b.toString('ascii', 0, quote.length));
// Check that the base64 decoder ignores illegal chars const expectedIllegal = expected.slice(0, 60) + ' \x80' + expected.slice(60, 120) + ' \xff' + expected.slice(120, 180) + ' \x00' + expected.slice(180, 240) + ' \x98' + expected.slice(240, 300) + '\x03' + expected.slice(300, 360); b = Buffer.from(expectedIllegal, encoding); assert.strictEqual(quote.length, b.length); assert.strictEqual(quote, b.toString('ascii', 0, quote.length)); });}
base64flavors.forEach((encoding) => { assert.strictEqual(Buffer.from('', encoding).toString(), ''); assert.strictEqual(Buffer.from('K', encoding).toString(), '');
// multiple-of-4 with padding assert.strictEqual(Buffer.from('Kg==', encoding).toString(), '*'); assert.strictEqual(Buffer.from('Kio=', encoding).toString(), '*'.repeat(2)); assert.strictEqual(Buffer.from('Kioq', encoding).toString(), '*'.repeat(3)); assert.strictEqual( Buffer.from('KioqKg==', encoding).toString(), '*'.repeat(4)); assert.strictEqual( Buffer.from('KioqKio=', encoding).toString(), '*'.repeat(5)); assert.strictEqual( Buffer.from('KioqKioq', encoding).toString(), '*'.repeat(6)); assert.strictEqual(Buffer.from('KioqKioqKg==', encoding).toString(), '*'.repeat(7)); assert.strictEqual(Buffer.from('KioqKioqKio=', encoding).toString(), '*'.repeat(8)); assert.strictEqual(Buffer.from('KioqKioqKioq', encoding).toString(), '*'.repeat(9)); assert.strictEqual(Buffer.from('KioqKioqKioqKg==', encoding).toString(), '*'.repeat(10)); assert.strictEqual(Buffer.from('KioqKioqKioqKio=', encoding).toString(), '*'.repeat(11)); assert.strictEqual(Buffer.from('KioqKioqKioqKioq', encoding).toString(), '*'.repeat(12)); assert.strictEqual(Buffer.from('KioqKioqKioqKioqKg==', encoding).toString(), '*'.repeat(13)); assert.strictEqual(Buffer.from('KioqKioqKioqKioqKio=', encoding).toString(), '*'.repeat(14)); assert.strictEqual(Buffer.from('KioqKioqKioqKioqKioq', encoding).toString(), '*'.repeat(15)); assert.strictEqual( Buffer.from('KioqKioqKioqKioqKioqKg==', encoding).toString(), '*'.repeat(16)); assert.strictEqual( Buffer.from('KioqKioqKioqKioqKioqKio=', encoding).toString(), '*'.repeat(17)); assert.strictEqual( Buffer.from('KioqKioqKioqKioqKioqKioq', encoding).toString(), '*'.repeat(18)); assert.strictEqual(Buffer.from('KioqKioqKioqKioqKioqKioqKg==', encoding).toString(), '*'.repeat(19)); assert.strictEqual(Buffer.from('KioqKioqKioqKioqKioqKioqKio=', encoding).toString(), '*'.repeat(20));
// No padding, not a multiple of 4 assert.strictEqual(Buffer.from('Kg', encoding).toString(), '*'); assert.strictEqual(Buffer.from('Kio', encoding).toString(), '*'.repeat(2)); assert.strictEqual(Buffer.from('KioqKg', encoding).toString(), '*'.repeat(4)); assert.strictEqual( Buffer.from('KioqKio', encoding).toString(), '*'.repeat(5)); assert.strictEqual(Buffer.from('KioqKioqKg', encoding).toString(), '*'.repeat(7)); assert.strictEqual(Buffer.from('KioqKioqKio', encoding).toString(), '*'.repeat(8)); assert.strictEqual(Buffer.from('KioqKioqKioqKg', encoding).toString(), '*'.repeat(10)); assert.strictEqual(Buffer.from('KioqKioqKioqKio', encoding).toString(), '*'.repeat(11)); assert.strictEqual(Buffer.from('KioqKioqKioqKioqKg', encoding).toString(), '*'.repeat(13)); assert.strictEqual(Buffer.from('KioqKioqKioqKioqKio', encoding).toString(), '*'.repeat(14)); assert.strictEqual(Buffer.from('KioqKioqKioqKioqKioqKg', encoding).toString(), '*'.repeat(16)); assert.strictEqual( Buffer.from('KioqKioqKioqKioqKioqKio', encoding).toString(), '*'.repeat(17)); assert.strictEqual( Buffer.from('KioqKioqKioqKioqKioqKioqKg', encoding).toString(), '*'.repeat(19)); assert.strictEqual( Buffer.from('KioqKioqKioqKioqKioqKioqKio', encoding).toString(), '*'.repeat(20));});
// Handle padding graciously, multiple-of-4 or notassert.strictEqual( Buffer.from('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw==', 'base64').length, 32);assert.strictEqual( Buffer.from('72INjkR5fchcxk9-VgdGPFJDxUBFR5_rMFsghgxADiw==', 'base64url') .length, 32);assert.strictEqual( Buffer.from('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw=', 'base64').length, 32);assert.strictEqual( Buffer.from('72INjkR5fchcxk9-VgdGPFJDxUBFR5_rMFsghgxADiw=', 'base64url') .length, 32);assert.strictEqual( Buffer.from('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw', 'base64').length, 32);assert.strictEqual( Buffer.from('72INjkR5fchcxk9-VgdGPFJDxUBFR5_rMFsghgxADiw', 'base64url') .length, 32);assert.strictEqual( Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg==', 'base64').length, 31);assert.strictEqual( Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg==', 'base64url') .length, 31);assert.strictEqual( Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg=', 'base64').length, 31);assert.strictEqual( Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg=', 'base64url') .length, 31);assert.strictEqual( Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg', 'base64').length, 31);assert.strictEqual( Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg', 'base64url').length, 31);
{// This string encodes single '.' character in UTF-16 const dot = Buffer.from('//4uAA==', 'base64'); assert.strictEqual(dot[0], 0xff); assert.strictEqual(dot[1], 0xfe); assert.strictEqual(dot[2], 0x2e); assert.strictEqual(dot[3], 0x00); assert.strictEqual(dot.toString('base64'), '//4uAA==');}
{// This string encodes single '.' character in UTF-16 const dot = Buffer.from('//4uAA', 'base64url'); assert.strictEqual(dot[0], 0xff); assert.strictEqual(dot[1], 0xfe); assert.strictEqual(dot[2], 0x2e); assert.strictEqual(dot[3], 0x00); assert.strictEqual(dot.toString('base64url'), '__4uAA');}
{ // Writing base64 at a position > 0 should not mangle the result. // // https://github.com/joyent/node/issues/402 const segments = ['TWFkbmVzcz8h', 'IFRoaXM=', 'IGlz', 'IG5vZGUuanMh']; const b = Buffer.allocUnsafe(64); let pos = 0;
for (let i = 0; i < segments.length; ++i) { pos += b.write(segments[i], pos, 'base64'); } assert.strictEqual(b.toString('latin1', 0, pos), 'Madness?! This is node.js!');}
{ // Writing base64url at a position > 0 should not mangle the result. // // https://github.com/joyent/node/issues/402 const segments = ['TWFkbmVzcz8h', 'IFRoaXM', 'IGlz', 'IG5vZGUuanMh']; const b = Buffer.allocUnsafe(64); let pos = 0;
for (let i = 0; i < segments.length; ++i) { pos += b.write(segments[i], pos, 'base64url'); } assert.strictEqual(b.toString('latin1', 0, pos), 'Madness?! This is node.js!');}
// Regression test for https://github.com/nodejs/node/issues/3496.assert.strictEqual(Buffer.from('=bad'.repeat(1e4), 'base64').length, 0);
// Regression test for https://github.com/nodejs/node/issues/11987.assert.deepStrictEqual(Buffer.from('w0 ', 'base64'), Buffer.from('w0', 'base64'));
// Regression test for https://github.com/nodejs/node/issues/13657.assert.deepStrictEqual(Buffer.from(' YWJvcnVtLg', 'base64'), Buffer.from('YWJvcnVtLg', 'base64'));
{ // Creating buffers larger than pool size. const l = Buffer.poolSize + 5; const s = 'h'.repeat(l); const b = Buffer.from(s);
for (let i = 0; i < l; i++) { assert.strictEqual(b[i], 'h'.charCodeAt(0)); }
const sb = b.toString(); assert.strictEqual(sb.length, s.length); assert.strictEqual(sb, s);}
{ // test hex toString const hexb = Buffer.allocUnsafe(256); for (let i = 0; i < 256; i++) { hexb[i] = i; } const hexStr = hexb.toString('hex'); assert.strictEqual(hexStr, '000102030405060708090a0b0c0d0e0f' + '101112131415161718191a1b1c1d1e1f' + '202122232425262728292a2b2c2d2e2f' + '303132333435363738393a3b3c3d3e3f' + '404142434445464748494a4b4c4d4e4f' + '505152535455565758595a5b5c5d5e5f' + '606162636465666768696a6b6c6d6e6f' + '707172737475767778797a7b7c7d7e7f' + '808182838485868788898a8b8c8d8e8f' + '909192939495969798999a9b9c9d9e9f' + 'a0a1a2a3a4a5a6a7a8a9aaabacadaeaf' + 'b0b1b2b3b4b5b6b7b8b9babbbcbdbebf' + 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf' + 'd0d1d2d3d4d5d6d7d8d9dadbdcdddedf' + 'e0e1e2e3e4e5e6e7e8e9eaebecedeeef' + 'f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff');
const hexb2 = Buffer.from(hexStr, 'hex'); for (let i = 0; i < 256; i++) { assert.strictEqual(hexb2[i], hexb[i]); }}
// Test single hex character is discarded.assert.strictEqual(Buffer.from('A', 'hex').length, 0);
// Test that if a trailing character is discarded, rest of string is processed.assert.deepStrictEqual(Buffer.from('Abx', 'hex'), Buffer.from('Ab', 'hex'));
// Test single base64 char encodes as 0.assert.strictEqual(Buffer.from('A', 'base64').length, 0);
{ // Test an invalid slice end. const b = Buffer.from([1, 2, 3, 4, 5]); const b2 = b.toString('hex', 1, 10000); const b3 = b.toString('hex', 1, 5); const b4 = b.toString('hex', 1); assert.strictEqual(b2, b3); assert.strictEqual(b2, b4);}
function buildBuffer(data) { if (Array.isArray(data)) { const buffer = Buffer.allocUnsafe(data.length); data.forEach((v, k) => buffer[k] = v); return buffer; } return null;}
const x = buildBuffer([0x81, 0xa3, 0x66, 0x6f, 0x6f, 0xa3, 0x62, 0x61, 0x72]);
assert.strictEqual(x.inspect(), '<Buffer 81 a3 66 6f 6f a3 62 61 72>');
{ const z = x.slice(4); assert.strictEqual(z.length, 5); assert.strictEqual(z[0], 0x6f); assert.strictEqual(z[1], 0xa3); assert.strictEqual(z[2], 0x62); assert.strictEqual(z[3], 0x61); assert.strictEqual(z[4], 0x72);}
{ const z = x.slice(0); assert.strictEqual(z.length, x.length);}
{ const z = x.slice(0, 4); assert.strictEqual(z.length, 4); assert.strictEqual(z[0], 0x81); assert.strictEqual(z[1], 0xa3);}
{ const z = x.slice(0, 9); assert.strictEqual(z.length, 9);}
{ const z = x.slice(1, 4); assert.strictEqual(z.length, 3); assert.strictEqual(z[0], 0xa3);}
{ const z = x.slice(2, 4); assert.strictEqual(z.length, 2); assert.strictEqual(z[0], 0x66); assert.strictEqual(z[1], 0x6f);}
['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach((encoding) => { const b = Buffer.allocUnsafe(10); b.write('あいうえお', encoding); assert.strictEqual(b.toString(encoding), 'あいうえお');});
['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach((encoding) => { const b = Buffer.allocUnsafe(11); b.write('あいうえお', 1, encoding); assert.strictEqual(b.toString(encoding, 1), 'あいうえお');});
{ // latin1 encoding should write only one byte per character. const b = Buffer.from([0xde, 0xad, 0xbe, 0xef]); let s = String.fromCharCode(0xffff); b.write(s, 0, 'latin1'); assert.strictEqual(b[0], 0xff); assert.strictEqual(b[1], 0xad); assert.strictEqual(b[2], 0xbe); assert.strictEqual(b[3], 0xef); s = String.fromCharCode(0xaaee); b.write(s, 0, 'latin1'); assert.strictEqual(b[0], 0xee); assert.strictEqual(b[1], 0xad); assert.strictEqual(b[2], 0xbe); assert.strictEqual(b[3], 0xef);}
{ // Binary encoding should write only one byte per character. const b = Buffer.from([0xde, 0xad, 0xbe, 0xef]); let s = String.fromCharCode(0xffff); b.write(s, 0, 'latin1'); assert.strictEqual(b[0], 0xff); assert.strictEqual(b[1], 0xad); assert.strictEqual(b[2], 0xbe); assert.strictEqual(b[3], 0xef); s = String.fromCharCode(0xaaee); b.write(s, 0, 'latin1'); assert.strictEqual(b[0], 0xee); assert.strictEqual(b[1], 0xad); assert.strictEqual(b[2], 0xbe); assert.strictEqual(b[3], 0xef);}
{ // https://github.com/nodejs/node-v0.x-archive/pull/1210 // Test UTF-8 string includes null character let buf = Buffer.from('\0'); assert.strictEqual(buf.length, 1); buf = Buffer.from('\0\0'); assert.strictEqual(buf.length, 2);}
{ const buf = Buffer.allocUnsafe(2); assert.strictEqual(buf.write(''), 0); // 0bytes assert.strictEqual(buf.write('\0'), 1); // 1byte (v8 adds null terminator) assert.strictEqual(buf.write('a\0'), 2); // 1byte * 2 assert.strictEqual(buf.write('あ'), 0); // 3bytes assert.strictEqual(buf.write('\0あ'), 1); // 1byte + 3bytes assert.strictEqual(buf.write('\0\0あ'), 2); // 1byte * 2 + 3bytes}
{ const buf = Buffer.allocUnsafe(10); assert.strictEqual(buf.write('あいう'), 9); // 3bytes * 3 (v8 adds null term.) assert.strictEqual(buf.write('あいう\0'), 10); // 3bytes * 3 + 1byte}
{ // https://github.com/nodejs/node-v0.x-archive/issues/243 // Test write() with maxLength const buf = Buffer.allocUnsafe(4); buf.fill(0xFF); assert.strictEqual(buf.write('abcd', 1, 2, 'utf8'), 2); assert.strictEqual(buf[0], 0xFF); assert.strictEqual(buf[1], 0x61); assert.strictEqual(buf[2], 0x62); assert.strictEqual(buf[3], 0xFF);
buf.fill(0xFF); assert.strictEqual(buf.write('abcd', 1, 4), 3); assert.strictEqual(buf[0], 0xFF); assert.strictEqual(buf[1], 0x61); assert.strictEqual(buf[2], 0x62); assert.strictEqual(buf[3], 0x63);
buf.fill(0xFF); assert.strictEqual(buf.write('abcd', 1, 2, 'utf8'), 2); assert.strictEqual(buf[0], 0xFF); assert.strictEqual(buf[1], 0x61); assert.strictEqual(buf[2], 0x62); assert.strictEqual(buf[3], 0xFF);
buf.fill(0xFF); assert.strictEqual(buf.write('abcdef', 1, 2, 'hex'), 2); assert.strictEqual(buf[0], 0xFF); assert.strictEqual(buf[1], 0xAB); assert.strictEqual(buf[2], 0xCD); assert.strictEqual(buf[3], 0xFF);
['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach((encoding) => { buf.fill(0xFF); assert.strictEqual(buf.write('abcd', 0, 2, encoding), 2); assert.strictEqual(buf[0], 0x61); assert.strictEqual(buf[1], 0x00); assert.strictEqual(buf[2], 0xFF); assert.strictEqual(buf[3], 0xFF); });}
{ // Test offset returns are correct const b = Buffer.allocUnsafe(16); assert.strictEqual(b.writeUInt32LE(0, 0), 4); assert.strictEqual(b.writeUInt16LE(0, 4), 6); assert.strictEqual(b.writeUInt8(0, 6), 7); assert.strictEqual(b.writeInt8(0, 7), 8); assert.strictEqual(b.writeDoubleLE(0, 8), 16);}
{ // Test unmatched surrogates not producing invalid utf8 output // ef bf bd = utf-8 representation of unicode replacement character // see https://codereview.chromium.org/121173009/ const buf = Buffer.from('ab\ud800cd', 'utf8'); assert.strictEqual(buf[0], 0x61); assert.strictEqual(buf[1], 0x62); assert.strictEqual(buf[2], 0xef); assert.strictEqual(buf[3], 0xbf); assert.strictEqual(buf[4], 0xbd); assert.strictEqual(buf[5], 0x63); assert.strictEqual(buf[6], 0x64);}
{ // Test for buffer overrun const buf = Buffer.from([0, 0, 0, 0, 0]); // length: 5 const sub = buf.slice(0, 4); // length: 4 assert.strictEqual(sub.write('12345', 'latin1'), 4); assert.strictEqual(buf[4], 0); assert.strictEqual(sub.write('12345', 'binary'), 4); assert.strictEqual(buf[4], 0);}
{ // Test alloc with fill option const buf = Buffer.alloc(5, '800A', 'hex'); assert.strictEqual(buf[0], 128); assert.strictEqual(buf[1], 10); assert.strictEqual(buf[2], 128); assert.strictEqual(buf[3], 10); assert.strictEqual(buf[4], 128);}
// Check for fractional length args, junk length args, etc.// https://github.com/joyent/node/issues/1758
// Call .fill() first, stops valgrind warning about uninitialized memory reads.Buffer.allocUnsafe(3.3).fill().toString();// Throws bad argument error in commit 43cb4ecBuffer.alloc(3.3).fill().toString();assert.strictEqual(Buffer.allocUnsafe(3.3).length, 3);assert.strictEqual(Buffer.from({ length: 3.3 }).length, 3);assert.strictEqual(Buffer.from({ length: 'BAM' }).length, 0);
// Make sure that strings are not coerced to numbers.assert.strictEqual(Buffer.from('99').length, 2);assert.strictEqual(Buffer.from('13.37').length, 5);
// Ensure that the length argument is respected.['ascii', 'utf8', 'hex', 'base64', 'latin1', 'binary'].forEach((enc) => { assert.strictEqual(Buffer.allocUnsafe(1).write('aaaaaa', 0, 1, enc), 1);});
{ // Regression test, guard against buffer overrun in the base64 decoder. const a = Buffer.allocUnsafe(3); const b = Buffer.from('xxx'); a.write('aaaaaaaa', 'base64'); assert.strictEqual(b.toString(), 'xxx');}
// issue GH-3416Buffer.from(Buffer.allocUnsafe(0), 0, 0);
// issue GH-5587assert.throws( () => Buffer.alloc(8).writeFloatLE(0, 5), outOfRangeError);assert.throws( () => Buffer.alloc(16).writeDoubleLE(0, 9), outOfRangeError);
// Attempt to overflow buffers, similar to previous bug in array buffersassert.throws( () => Buffer.allocUnsafe(8).writeFloatLE(0.0, 0xffffffff), outOfRangeError);assert.throws( () => Buffer.allocUnsafe(8).writeFloatLE(0.0, 0xffffffff), outOfRangeError);
// Ensure negative values can't get past offsetassert.throws( () => Buffer.allocUnsafe(8).writeFloatLE(0.0, -1), outOfRangeError);assert.throws( () => Buffer.allocUnsafe(8).writeFloatLE(0.0, -1), outOfRangeError);
// Test for common write(U)IntLE/BE{ let buf = Buffer.allocUnsafe(3); buf.writeUIntLE(0x123456, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0x56, 0x34, 0x12]); assert.strictEqual(buf.readUIntLE(0, 3), 0x123456);
buf.fill(0xFF); buf.writeUIntBE(0x123456, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0x12, 0x34, 0x56]); assert.strictEqual(buf.readUIntBE(0, 3), 0x123456);
buf.fill(0xFF); buf.writeIntLE(0x123456, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0x56, 0x34, 0x12]); assert.strictEqual(buf.readIntLE(0, 3), 0x123456);
buf.fill(0xFF); buf.writeIntBE(0x123456, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0x12, 0x34, 0x56]); assert.strictEqual(buf.readIntBE(0, 3), 0x123456);
buf.fill(0xFF); buf.writeIntLE(-0x123456, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0xaa, 0xcb, 0xed]); assert.strictEqual(buf.readIntLE(0, 3), -0x123456);
buf.fill(0xFF); buf.writeIntBE(-0x123456, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0xed, 0xcb, 0xaa]); assert.strictEqual(buf.readIntBE(0, 3), -0x123456);
buf.fill(0xFF); buf.writeIntLE(-0x123400, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0x00, 0xcc, 0xed]); assert.strictEqual(buf.readIntLE(0, 3), -0x123400);
buf.fill(0xFF); buf.writeIntBE(-0x123400, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0xed, 0xcc, 0x00]); assert.strictEqual(buf.readIntBE(0, 3), -0x123400);
buf.fill(0xFF); buf.writeIntLE(-0x120000, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0x00, 0x00, 0xee]); assert.strictEqual(buf.readIntLE(0, 3), -0x120000);
buf.fill(0xFF); buf.writeIntBE(-0x120000, 0, 3); assert.deepStrictEqual(buf.toJSON().data, [0xee, 0x00, 0x00]); assert.strictEqual(buf.readIntBE(0, 3), -0x120000);
buf = Buffer.allocUnsafe(5); buf.writeUIntLE(0x1234567890, 0, 5); assert.deepStrictEqual(buf.toJSON().data, [0x90, 0x78, 0x56, 0x34, 0x12]); assert.strictEqual(buf.readUIntLE(0, 5), 0x1234567890);
buf.fill(0xFF); buf.writeUIntBE(0x1234567890, 0, 5); assert.deepStrictEqual(buf.toJSON().data, [0x12, 0x34, 0x56, 0x78, 0x90]); assert.strictEqual(buf.readUIntBE(0, 5), 0x1234567890);
buf.fill(0xFF); buf.writeIntLE(0x1234567890, 0, 5); assert.deepStrictEqual(buf.toJSON().data, [0x90, 0x78, 0x56, 0x34, 0x12]); assert.strictEqual(buf.readIntLE(0, 5), 0x1234567890);
buf.fill(0xFF); buf.writeIntBE(0x1234567890, 0, 5); assert.deepStrictEqual(buf.toJSON().data, [0x12, 0x34, 0x56, 0x78, 0x90]); assert.strictEqual(buf.readIntBE(0, 5), 0x1234567890);
buf.fill(0xFF); buf.writeIntLE(-0x1234567890, 0, 5); assert.deepStrictEqual(buf.toJSON().data, [0x70, 0x87, 0xa9, 0xcb, 0xed]); assert.strictEqual(buf.readIntLE(0, 5), -0x1234567890);
buf.fill(0xFF); buf.writeIntBE(-0x1234567890, 0, 5); assert.deepStrictEqual(buf.toJSON().data, [0xed, 0xcb, 0xa9, 0x87, 0x70]); assert.strictEqual(buf.readIntBE(0, 5), -0x1234567890);
buf.fill(0xFF); buf.writeIntLE(-0x0012000000, 0, 5); assert.deepStrictEqual(buf.toJSON().data, [0x00, 0x00, 0x00, 0xee, 0xff]); assert.strictEqual(buf.readIntLE(0, 5), -0x0012000000);
buf.fill(0xFF); buf.writeIntBE(-0x0012000000, 0, 5); assert.deepStrictEqual(buf.toJSON().data, [0xff, 0xee, 0x00, 0x00, 0x00]); assert.strictEqual(buf.readIntBE(0, 5), -0x0012000000);}
// Regression test for https://github.com/nodejs/node-v0.x-archive/issues/5482:// should throw but not assert in C++ land.assert.throws( () => Buffer.from('', 'buffer'), { code: 'ERR_UNKNOWN_ENCODING', name: 'TypeError', message: 'Unknown encoding: buffer' });
// Regression test for https://github.com/nodejs/node-v0.x-archive/issues/6111.// Constructing a buffer from another buffer should a) work, and b) not corrupt// the source buffer.{ const a = [...Array(128).keys()]; // [0, 1, 2, 3, ... 126, 127] const b = Buffer.from(a); const c = Buffer.from(b); assert.strictEqual(b.length, a.length); assert.strictEqual(c.length, a.length); for (let i = 0, k = a.length; i < k; ++i) { assert.strictEqual(a[i], i); assert.strictEqual(b[i], i); assert.strictEqual(c[i], i); }}
if (common.hasCrypto) { // eslint-disable-line node-core/crypto-check // Test truncation after decode const crypto = require('crypto');
const b1 = Buffer.from('YW55=======', 'base64'); const b2 = Buffer.from('YW55', 'base64');
assert.strictEqual( crypto.createHash('sha1').update(b1).digest('hex'), crypto.createHash('sha1').update(b2).digest('hex') );} else { common.printSkipMessage('missing crypto');}
const ps = Buffer.poolSize;Buffer.poolSize = 0;assert(Buffer.allocUnsafe(1).parent instanceof ArrayBuffer);Buffer.poolSize = ps;
assert.throws( () => Buffer.allocUnsafe(10).copy(), { code: 'ERR_INVALID_ARG_TYPE', name: 'TypeError', message: 'The "target" argument must be an instance of Buffer or ' + 'Uint8Array. Received undefined' });
assert.throws(() => Buffer.from(), { name: 'TypeError', message: 'The first argument must be of type string or an instance of ' + 'Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined'});assert.throws(() => Buffer.from(null), { name: 'TypeError', message: 'The first argument must be of type string or an instance of ' + 'Buffer, ArrayBuffer, or Array or an Array-like Object. Received null'});
// Test prototype getters don't throwassert.strictEqual(Buffer.prototype.parent, undefined);assert.strictEqual(Buffer.prototype.offset, undefined);assert.strictEqual(SlowBuffer.prototype.parent, undefined);assert.strictEqual(SlowBuffer.prototype.offset, undefined);
{ // Test that large negative Buffer length inputs don't affect the pool offset. // Use the fromArrayLike() variant here because it's more lenient // about its input and passes the length directly to allocate(). assert.deepStrictEqual(Buffer.from({ length: -Buffer.poolSize }), Buffer.from('')); assert.deepStrictEqual(Buffer.from({ length: -100 }), Buffer.from(''));
// Check pool offset after that by trying to write string into the pool. Buffer.from('abc');}
// Test that ParseArrayIndex handles full uint32{ const errMsg = common.expectsError({ code: 'ERR_BUFFER_OUT_OF_BOUNDS', name: 'RangeError', message: '"offset" is outside of buffer bounds' }); assert.throws(() => Buffer.from(new ArrayBuffer(0), -1 >>> 0), errMsg);}
// ParseArrayIndex() should reject values that don't fit in a 32 bits size_t.assert.throws(() => { const a = Buffer.alloc(1); const b = Buffer.alloc(1); a.copy(b, 0, 0x100000000, 0x100000001);}, outOfRangeError);
// Unpooled buffer (replaces SlowBuffer){ const ubuf = Buffer.allocUnsafeSlow(10); assert(ubuf); assert(ubuf.buffer); assert.strictEqual(ubuf.buffer.byteLength, 10);}
// Regression test to verify that an empty ArrayBuffer does not throw.Buffer.from(new ArrayBuffer());
// TODO(kt3k): Enable this test when vm.runInNewContext is available// Test that ArrayBuffer from a different context is detected correctly.// const arrayBuf = vm.runInNewContext('new ArrayBuffer()');// Buffer.from(arrayBuf);// Buffer.from({ buffer: arrayBuf });
assert.throws(() => Buffer.alloc({ valueOf: () => 1 }), /"size" argument must be of type number/);assert.throws(() => Buffer.alloc({ valueOf: () => -1 }), /"size" argument must be of type number/);
assert.strictEqual(Buffer.prototype.toLocaleString, Buffer.prototype.toString);{ const buf = Buffer.from('test'); assert.strictEqual(buf.toLocaleString(), buf.toString());}
assert.throws(() => { Buffer.alloc(0x1000, 'This is not correctly encoded', 'hex');}, { code: 'ERR_INVALID_ARG_VALUE', name: 'TypeError'});
assert.throws(() => { Buffer.alloc(0x1000, 'c', 'hex');}, { code: 'ERR_INVALID_ARG_VALUE', name: 'TypeError'});
assert.throws(() => { Buffer.alloc(1, Buffer.alloc(0));}, { code: 'ERR_INVALID_ARG_VALUE', name: 'TypeError'});
assert.throws(() => { Buffer.alloc(40, 'x', 20);}, { code: 'ERR_INVALID_ARG_TYPE', name: 'TypeError'});
Version Info