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'use strict';
const common = require('../common');
const assert = require('assert');
const vm = require('vm');
const {
Buffer,
kMaxLength,
} = require('buffer');
// 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(kMaxLength + 1),
{ message: `Invalid typed array length: ${kMaxLength + 1}` },
);
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 Uint8Array
{
const ui8 = new Uint8Array(4).fill(42);
const e = Buffer.from(ui8);
for (const [index, value] of e.entries()) {
assert.strictEqual(value, ui8[index]);
}
}
// Test creating a Buffer from a Uint8Array (old constructor)
{
const ui8 = new Uint8Array(4).fill(42);
const e = Buffer(ui8);
for (const [key, value] of e.entries()) {
assert.strictEqual(value, ui8[key]);
}
}
// Test creating a Buffer from a Uint32Array
// Note: it is implicitly interpreted as Array of integers modulo 256
{
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)
// Note: it is implicitly interpreted as Array of integers modulo 256
{
const ui32 = new Uint32Array(4).fill(42);
const e = Buffer(ui32);
for (const [key, value] of e.entries()) {
assert.strictEqual(value, ui32[key]);
}
}
// Test invalid encoding for Buffer.toString
assert.throws(() => b.toString('invalid'),
/Unknown encoding: invalid/);
// Invalid encoding for Buffer.write
assert.throws(() => b.write('test string', 0, 5, 'invalid'),
/Unknown encoding: invalid/);
// Unsupported arguments for Buffer.write
assert.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 b
assert.throws(() => b.write('', 2048), outOfRangeError);
// Throw when writing to negative offset
assert.throws(() => b.write('a', -1), outOfRangeError);
// Throw when writing past bounds from the pool
assert.throws(() => b.write('a', 2048), outOfRangeError);
// Throw when writing to negative offset
assert.throws(() => b.write('a', -1), outOfRangeError);
// Try to copy 0 bytes worth of data into an empty buffer
b.copy(Buffer.alloc(0), 0, 0, 0);
// Try to copy 0 bytes past the end of the target buffer
b.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 buffer
b.copy(Buffer.alloc(1), 0, 1024, 1024);
// 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 = 'Β‘hΞllΓ³ wΓ΄rld!';
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'; // ΓΆζ₯ζ¬θͺ
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('ΓΌber');
assert.deepStrictEqual(e, Buffer.from([195, 188, 98, 101, 114]));
}
{
// Test for proper ascii Encoding, length should be 4
const f = Buffer.from('ΓΌber', '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('ΓΌber', encoding);
assert.deepStrictEqual(f, Buffer.from([252, 0, 98, 0, 101, 0, 114, 0]));
}
{
// Length should be 12
const f = Buffer.from('ΠΏΡΠΈΠ²Π΅Ρ', encoding);
assert.deepStrictEqual(
f, Buffer.from([63, 4, 64, 4, 56, 4, 50, 4, 53, 4, 66, 4])
);
assert.strictEqual(f.toString(encoding), 'ΠΏΡΠΈΠ²Π΅Ρ');
}
{
const f = Buffer.from([0, 0, 0, 0, 0]);
assert.strictEqual(f.length, 5);
const size = f.write('γγγγγ', 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 not
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('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('γγγγγ', encoding);
assert.strictEqual(b.toString(encoding), 'γγγγγ');
});
['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach((encoding) => {
const b = Buffer.allocUnsafe(11);
b.write('γγγγγ', 1, encoding);
assert.strictEqual(b.toString(encoding, 1), 'γγγγγ');
});
{
// 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('γ'), 0); // 3bytes
assert.strictEqual(buf.write('\0γ'), 1); // 1byte + 3bytes
assert.strictEqual(buf.write('\0\0γ'), 2); // 1byte * 2 + 3bytes
}
{
const buf = Buffer.allocUnsafe(10);
assert.strictEqual(buf.write('γγγ'), 9); // 3bytes * 3 (v8 adds null term.)
assert.strictEqual(buf.write('γγγ\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 43cb4ec
Buffer.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-3416
Buffer.from(Buffer.allocUnsafe(0), 0, 0);
// issue GH-5587
assert.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 buffers
assert.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 offset
assert.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);