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test-buffer-alloc.js
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1443 lines (1223 loc) · 44.1 KB
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'use strict';
var common = require('../common');
var assert = require('assert');
var Buffer = require('buffer').Buffer;
var SlowBuffer = require('buffer').SlowBuffer;
// counter to ensure unique value is always copied
var cntr = 0;
var b = Buffer.alloc(1024);
console.log('b.length == %d', b.length);
assert.strictEqual(1024, b.length);
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]);
}
var c = Buffer.alloc(512);
console.log('c.length == %d', c.length);
assert.strictEqual(512, c.length);
var d = Buffer.from([]);
assert.strictEqual(0, d.length);
var ui32 = new Uint32Array(4).fill(42);
var e = Buffer.from(ui32);
assert.deepEqual(ui32, e);
// First check Buffer#fill() works as expected.
assert.throws(function() {
Buffer.allocUnsafe(8).fill('a', -1);
});
assert.throws(function() {
Buffer.allocUnsafe(8).fill('a', 0, 9);
});
// Make sure this doesn't hang indefinitely.
Buffer.allocUnsafe(8).fill('');
{
const buf = Buffer.allocUnsafe(64);
buf.fill(10);
for (let i = 0; i < buf.length; i++)
assert.equal(buf[i], 10);
buf.fill(11, 0, buf.length >> 1);
for (let i = 0; i < buf.length >> 1; i++)
assert.equal(buf[i], 11);
for (let i = (buf.length >> 1) + 1; i < buf.length; i++)
assert.equal(buf[i], 10);
buf.fill('h');
for (let i = 0; i < buf.length; i++)
assert.equal('h'.charCodeAt(0), buf[i]);
buf.fill(0);
for (let i = 0; i < buf.length; i++)
assert.equal(0, buf[i]);
buf.fill(null);
for (let i = 0; i < buf.length; i++)
assert.equal(0, buf[i]);
buf.fill(1, 16, 32);
for (let i = 0; i < 16; i++)
assert.equal(0, buf[i]);
for (let i = 16; i < 32; i++)
assert.equal(1, buf[i]);
for (let i = 32; i < buf.length; i++)
assert.equal(0, buf[i]);
}
{
const buf = Buffer.allocUnsafe(10);
buf.fill('abc');
assert.equal(buf.toString(), 'abcabcabca');
buf.fill('է');
assert.equal(buf.toString(), 'էէէէէ');
}
{
// copy 512 bytes, from 0 to 512.
b.fill(++cntr);
c.fill(++cntr);
const copied = b.copy(c, 0, 0, 512);
console.log('copied %d bytes from b into c', copied);
assert.strictEqual(512, copied);
for (let i = 0; i < c.length; i++) {
assert.strictEqual(b[i], c[i]);
}
}
{
// copy c into b, without specifying sourceEnd
b.fill(++cntr);
c.fill(++cntr);
const copied = c.copy(b, 0, 0);
console.log('copied %d bytes from c into b w/o sourceEnd', copied);
assert.strictEqual(c.length, copied);
for (let i = 0; i < c.length; i++) {
assert.strictEqual(c[i], b[i]);
}
}
{
// copy c into b, without specifying sourceStart
b.fill(++cntr);
c.fill(++cntr);
const copied = c.copy(b, 0);
console.log('copied %d bytes from c into b w/o sourceStart', copied);
assert.strictEqual(c.length, copied);
for (let i = 0; i < c.length; i++) {
assert.strictEqual(c[i], b[i]);
}
}
{
// copy longer buffer b to shorter c without targetStart
b.fill(++cntr);
c.fill(++cntr);
const copied = b.copy(c);
console.log('copied %d bytes from b into c w/o targetStart', copied);
assert.strictEqual(c.length, copied);
for (let i = 0; i < c.length; i++) {
assert.strictEqual(b[i], c[i]);
}
}
{
// copy starting near end of b to c
b.fill(++cntr);
c.fill(++cntr);
const copied = b.copy(c, 0, b.length - Math.floor(c.length / 2));
console.log('copied %d bytes from end of b into beginning of c', copied);
assert.strictEqual(Math.floor(c.length / 2), copied);
for (let i = 0; i < Math.floor(c.length / 2); i++) {
assert.strictEqual(b[b.length - Math.floor(c.length / 2) + i], c[i]);
}
for (let i = Math.floor(c.length / 2) + 1; i < c.length; i++) {
assert.strictEqual(c[c.length - 1], c[i]);
}
}
{
// try to copy 513 bytes, and check we don't overrun c
b.fill(++cntr);
c.fill(++cntr);
const copied = b.copy(c, 0, 0, 513);
console.log('copied %d bytes from b trying to overrun c', copied);
assert.strictEqual(c.length, copied);
for (let i = 0; i < c.length; i++) {
assert.strictEqual(b[i], c[i]);
}
}
{
// copy 768 bytes from b into b
b.fill(++cntr);
b.fill(++cntr, 256);
const copied = b.copy(b, 0, 256, 1024);
console.log('copied %d bytes from b into b', copied);
assert.strictEqual(768, copied);
for (let i = 0; i < b.length; i++) {
assert.strictEqual(cntr, b[i]);
}
}
// copy string longer than buffer length (failure will segfault)
var bb = Buffer.allocUnsafe(10);
bb.fill('hello crazy world');
// try to copy from before the beginning of b
assert.doesNotThrow(() => { b.copy(c, 0, 100, 10); });
// copy throws at negative sourceStart
assert.throws(function() {
Buffer.allocUnsafe(5).copy(Buffer.allocUnsafe(5), 0, -1);
}, RangeError);
{
// check sourceEnd resets to targetEnd if former is greater than the latter
b.fill(++cntr);
c.fill(++cntr);
const copied = b.copy(c, 0, 0, 1025);
console.log('copied %d bytes from b into c', copied);
for (let i = 0; i < c.length; i++) {
assert.strictEqual(b[i], c[i]);
}
}
// throw with negative sourceEnd
console.log('test copy at negative sourceEnd');
assert.throws(function() {
b.copy(c, 0, 0, -1);
}, RangeError);
// when sourceStart is greater than sourceEnd, zero copied
assert.equal(b.copy(c, 0, 100, 10), 0);
// when targetStart > targetLength, zero copied
assert.equal(b.copy(c, 512, 0, 10), 0);
var caught_error;
// invalid encoding for Buffer.toString
caught_error = null;
try {
b.toString('invalid');
} catch (err) {
caught_error = err;
}
assert.strictEqual('Unknown encoding: invalid', caught_error.message);
// invalid encoding for Buffer.write
caught_error = null;
try {
b.write('test string', 0, 5, 'invalid');
} catch (err) {
caught_error = err;
}
assert.strictEqual('Unknown encoding: invalid', caught_error.message);
// try to create 0-length buffers
Buffer.from('');
Buffer.from('', 'ascii');
Buffer.from('', 'binary');
Buffer.alloc(0);
// try to write a 0-length string beyond the end of b
assert.throws(function() {
b.write('', 2048);
}, RangeError);
// throw when writing to negative offset
assert.throws(function() {
b.write('a', -1);
}, RangeError);
// throw when writing past bounds from the pool
assert.throws(function() {
b.write('a', 2048);
}, RangeError);
// throw when writing to negative offset
assert.throws(function() {
b.write('a', -1);
}, RangeError);
// 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.allocUnsafe(1), 1, 1, 1);
// try to copy 0 bytes from past the end of the source buffer
b.copy(Buffer.allocUnsafe(1), 0, 2048, 2048);
const rangeBuffer = Buffer.from('abc');
// if start >= buffer's length, empty string will be returned
assert.equal(rangeBuffer.toString('ascii', 3), '');
assert.equal(rangeBuffer.toString('ascii', +Infinity), '');
assert.equal(rangeBuffer.toString('ascii', 3.14, 3), '');
assert.equal(rangeBuffer.toString('ascii', 'Infinity', 3), '');
// if end <= 0, empty string will be returned
assert.equal(rangeBuffer.toString('ascii', 1, 0), '');
assert.equal(rangeBuffer.toString('ascii', 1, -1.2), '');
assert.equal(rangeBuffer.toString('ascii', 1, -100), '');
assert.equal(rangeBuffer.toString('ascii', 1, -Infinity), '');
// if start < 0, start will be taken as zero
assert.equal(rangeBuffer.toString('ascii', -1, 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', -1.99, 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', -Infinity, 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', '-1', 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', '-1.99', 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', '-Infinity', 3), 'abc');
// if start is an invalid integer, start will be taken as zero
assert.equal(rangeBuffer.toString('ascii', 'node.js', 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', {}, 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', [], 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', NaN, 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', null, 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', undefined, 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', false, 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', '', 3), 'abc');
// but, if start is an integer when coerced, then it will be coerced and used.
assert.equal(rangeBuffer.toString('ascii', '-1', 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', '1', 3), 'bc');
assert.equal(rangeBuffer.toString('ascii', '-Infinity', 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', '3', 3), '');
assert.equal(rangeBuffer.toString('ascii', Number(3), 3), '');
assert.equal(rangeBuffer.toString('ascii', '3.14', 3), '');
assert.equal(rangeBuffer.toString('ascii', '1.99', 3), 'bc');
assert.equal(rangeBuffer.toString('ascii', '-1.99', 3), 'abc');
assert.equal(rangeBuffer.toString('ascii', 1.99, 3), 'bc');
assert.equal(rangeBuffer.toString('ascii', true, 3), 'bc');
// if end > buffer's length, end will be taken as buffer's length
assert.equal(rangeBuffer.toString('ascii', 0, 5), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, 6.99), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, Infinity), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, '5'), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, '6.99'), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, 'Infinity'), 'abc');
// if end is an invalid integer, end will be taken as buffer's length
assert.equal(rangeBuffer.toString('ascii', 0, 'node.js'), '');
assert.equal(rangeBuffer.toString('ascii', 0, {}), '');
assert.equal(rangeBuffer.toString('ascii', 0, NaN), '');
assert.equal(rangeBuffer.toString('ascii', 0, undefined), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, null), '');
assert.equal(rangeBuffer.toString('ascii', 0, []), '');
assert.equal(rangeBuffer.toString('ascii', 0, false), '');
assert.equal(rangeBuffer.toString('ascii', 0, ''), '');
// but, if end is an integer when coerced, then it will be coerced and used.
assert.equal(rangeBuffer.toString('ascii', 0, '-1'), '');
assert.equal(rangeBuffer.toString('ascii', 0, '1'), 'a');
assert.equal(rangeBuffer.toString('ascii', 0, '-Infinity'), '');
assert.equal(rangeBuffer.toString('ascii', 0, '3'), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, Number(3)), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, '3.14'), 'abc');
assert.equal(rangeBuffer.toString('ascii', 0, '1.99'), 'a');
assert.equal(rangeBuffer.toString('ascii', 0, '-1.99'), '');
assert.equal(rangeBuffer.toString('ascii', 0, 1.99), 'a');
assert.equal(rangeBuffer.toString('ascii', 0, true), 'a');
// try toString() with a object as a encoding
assert.equal(rangeBuffer.toString({toString: function() {
return 'ascii';
}}), 'abc');
// testing for smart defaults and ability to pass string values as offset
var writeTest = Buffer.from('abcdes');
writeTest.write('n', 'ascii');
writeTest.write('o', 'ascii', '1');
writeTest.write('d', '2', 'ascii');
writeTest.write('e', 3, 'ascii');
writeTest.write('j', 'ascii', 4);
assert.equal(writeTest.toString(), 'nodejs');
// 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.equal(asciiString, asciiSlice);
}
{
const asciiString = 'hello world';
const offset = 100;
const written = b.write(asciiString, offset, 'ascii');
assert.equal(asciiString.length, written);
const asciiSlice = b.toString('ascii', offset, offset + asciiString.length);
assert.equal(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.equal(sliceA[i], sliceB[i]);
}
}
// UTF-8 slice test
var utf8String = '¡hέlló wôrld!';
var offset = 100;
b.write(utf8String, 0, Buffer.byteLength(utf8String), 'utf8');
var utf8Slice = b.toString('utf8', 0, Buffer.byteLength(utf8String));
assert.equal(utf8String, utf8Slice);
var written = b.write(utf8String, offset, 'utf8');
assert.equal(Buffer.byteLength(utf8String), written);
utf8Slice = b.toString('utf8', offset, offset + Buffer.byteLength(utf8String));
assert.equal(utf8String, utf8Slice);
var sliceA = b.slice(offset, offset + Buffer.byteLength(utf8String));
var sliceB = b.slice(offset, offset + Buffer.byteLength(utf8String));
for (let i = 0; i < Buffer.byteLength(utf8String); i++) {
assert.equal(sliceA[i], sliceB[i]);
}
{
const slice = b.slice(100, 150);
assert.equal(50, slice.length);
for (let i = 0; i < 50; i++) {
assert.equal(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.equal(b.parent, c.parent);
assert.equal(b.parent, d.parent);
}
{
// also from a non-pooled instance
const b = new SlowBuffer(5);
const c = b.slice(0, 4);
const d = c.slice(0, 2);
assert.equal(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');
console.log('bytes written to buffer: ' + size);
const slice = buffer.toString('utf8', 0, size);
assert.equal(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.equal(4, b[0]);
assert.equal(5, b[1]);
assert.equal(6, b[2]);
assert.equal(7, b[3]);
const c = b.slice(2, 4);
assert.equal(6, c[0]);
assert.equal(7, c[1]);
}
{
const d = Buffer.from([23, 42, 255]);
assert.equal(d.length, 3);
assert.equal(d[0], 23);
assert.equal(d[1], 42);
assert.equal(d[2], 255);
assert.deepEqual(d, Buffer.from(d));
}
{
const e = Buffer.from('über');
console.error('uber: \'%s\'', e.toString());
assert.deepEqual(e, Buffer.from([195, 188, 98, 101, 114]));
}
{
const f = Buffer.from('über', 'ascii');
console.error('f.length: %d (should be 4)', f.length);
assert.deepEqual(f, Buffer.from([252, 98, 101, 114]));
}
['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
{
const f = Buffer.from('über', encoding);
console.error('f.length: %d (should be 8)', f.length);
assert.deepEqual(f, Buffer.from([252, 0, 98, 0, 101, 0, 114, 0]));
}
{
const f = Buffer.from('привет', encoding);
console.error('f.length: %d (should be 12)', f.length);
assert.deepEqual(f,
Buffer.from([63, 4, 64, 4, 56, 4, 50, 4, 53, 4, 66, 4]));
assert.equal(f.toString(encoding), 'привет');
}
{
const f = Buffer.from([0, 0, 0, 0, 0]);
assert.equal(f.length, 5);
const size = f.write('あいうえお', encoding);
console.error('bytes written to buffer: %d (should be 4)', size);
assert.equal(size, 4);
assert.deepEqual(f, Buffer.from([0x42, 0x30, 0x44, 0x30, 0x00]));
}
});
{
const f = Buffer.from('\uD83D\uDC4D', 'utf-16le'); // THUMBS UP SIGN (U+1F44D)
assert.equal(f.length, 4);
assert.deepEqual(f, Buffer.from('3DD84DDC', 'hex'));
}
var arrayIsh = {0: 0, 1: 1, 2: 2, 3: 3, length: 4};
var g = Buffer.from(arrayIsh);
assert.deepEqual(g, Buffer.from([0, 1, 2, 3]));
var strArrayIsh = {0: '0', 1: '1', 2: '2', 3: '3', length: 4};
g = Buffer.from(strArrayIsh);
assert.deepEqual(g, Buffer.from([0, 1, 2, 3]));
//
// Test toString('base64')
//
assert.equal('TWFu', (Buffer.from('Man')).toString('base64'));
{
// test that regular and URL-safe base64 both work
const expected = [0xff, 0xff, 0xbe, 0xff, 0xef, 0xbf, 0xfb, 0xef, 0xff];
assert.deepEqual(Buffer.from('//++/++/++//', 'base64'),
Buffer.from(expected));
assert.deepEqual(Buffer.from('__--_--_--__', 'base64'),
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.equal(expected, (Buffer.from(quote)).toString('base64'));
let b = Buffer.allocUnsafe(1024);
let bytesWritten = b.write(expected, 0, 'base64');
assert.equal(quote.length, bytesWritten);
assert.equal(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, 'base64');
assert.equal(quote.length, bytesWritten);
assert.equal(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, 'base64');
assert.equal(quote.length, b.length);
assert.equal(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, 'base64');
assert.equal(quote.length, b.length);
assert.equal(quote, b.toString('ascii', 0, quote.length));
}
assert.equal(Buffer.from('', 'base64').toString(), '');
assert.equal(Buffer.from('K', 'base64').toString(), '');
// multiple-of-4 with padding
assert.equal(Buffer.from('Kg==', 'base64').toString(), '*');
assert.equal(Buffer.from('Kio=', 'base64').toString(), '**');
assert.equal(Buffer.from('Kioq', 'base64').toString(), '***');
assert.equal(Buffer.from('KioqKg==', 'base64').toString(), '****');
assert.equal(Buffer.from('KioqKio=', 'base64').toString(), '*****');
assert.equal(Buffer.from('KioqKioq', 'base64').toString(), '******');
assert.equal(Buffer.from('KioqKioqKg==', 'base64').toString(), '*******');
assert.equal(Buffer.from('KioqKioqKio=', 'base64').toString(), '********');
assert.equal(Buffer.from('KioqKioqKioq', 'base64').toString(), '*********');
assert.equal(Buffer.from('KioqKioqKioqKg==', 'base64').toString(),
'**********');
assert.equal(Buffer.from('KioqKioqKioqKio=', 'base64').toString(),
'***********');
assert.equal(Buffer.from('KioqKioqKioqKioq', 'base64').toString(),
'************');
assert.equal(Buffer.from('KioqKioqKioqKioqKg==', 'base64').toString(),
'*************');
assert.equal(Buffer.from('KioqKioqKioqKioqKio=', 'base64').toString(),
'**************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioq', 'base64').toString(),
'***************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKg==', 'base64').toString(),
'****************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKio=', 'base64').toString(),
'*****************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKioq', 'base64').toString(),
'******************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKioqKg==', 'base64').toString(),
'*******************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKioqKio=', 'base64').toString(),
'********************');
// no padding, not a multiple of 4
assert.equal(Buffer.from('Kg', 'base64').toString(), '*');
assert.equal(Buffer.from('Kio', 'base64').toString(), '**');
assert.equal(Buffer.from('KioqKg', 'base64').toString(), '****');
assert.equal(Buffer.from('KioqKio', 'base64').toString(), '*****');
assert.equal(Buffer.from('KioqKioqKg', 'base64').toString(), '*******');
assert.equal(Buffer.from('KioqKioqKio', 'base64').toString(), '********');
assert.equal(Buffer.from('KioqKioqKioqKg', 'base64').toString(), '**********');
assert.equal(Buffer.from('KioqKioqKioqKio', 'base64').toString(),
'***********');
assert.equal(Buffer.from('KioqKioqKioqKioqKg', 'base64').toString(),
'*************');
assert.equal(Buffer.from('KioqKioqKioqKioqKio', 'base64').toString(),
'**************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKg', 'base64').toString(),
'****************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKio', 'base64').toString(),
'*****************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKioqKg', 'base64').toString(),
'*******************');
assert.equal(Buffer.from('KioqKioqKioqKioqKioqKioqKio', 'base64').toString(),
'********************');
// handle padding graciously, multiple-of-4 or not
assert.equal(Buffer.from('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw==',
'base64').length, 32);
assert.equal(Buffer.from('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw=',
'base64').length, 32);
assert.equal(Buffer.from('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw',
'base64').length, 32);
assert.equal(Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg==',
'base64').length, 31);
assert.equal(Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg=',
'base64').length, 31);
assert.equal(Buffer.from('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg',
'base64').length, 31);
// This string encodes single '.' character in UTF-16
var dot = Buffer.from('//4uAA==', 'base64');
assert.equal(dot[0], 0xff);
assert.equal(dot[1], 0xfe);
assert.equal(dot[2], 0x2e);
assert.equal(dot[3], 0x00);
assert.equal(dot.toString('base64'), '//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.equal(b.toString('binary', 0, pos), 'Madness?! This is node.js!');
}
// Regression test for https://github.com/nodejs/node/issues/3496.
assert.equal(Buffer.from('=bad'.repeat(1e4), 'base64').length, 0);
{
// Creating buffers larger than pool size.
const l = Buffer.poolSize + 5;
let s = '';
for (let i = 0; i < l; i++) {
s += 'h';
}
const b = Buffer.from(s);
for (let i = 0; i < l; i++) {
assert.equal('h'.charCodeAt(0), b[i]);
}
const sb = b.toString();
assert.equal(sb.length, s.length);
assert.equal(sb, s);
}
{
// Single argument slice
const b = Buffer.from('abcde');
assert.equal('bcde', b.slice(1).toString());
}
// slice(0,0).length === 0
assert.equal(0, Buffer.from('hello').slice(0, 0).length);
// test hex toString
console.log('Create hex string from buffer');
var hexb = Buffer.allocUnsafe(256);
for (let i = 0; i < 256; i++) {
hexb[i] = i;
}
var hexStr = hexb.toString('hex');
assert.equal(hexStr,
'000102030405060708090a0b0c0d0e0f' +
'101112131415161718191a1b1c1d1e1f' +
'202122232425262728292a2b2c2d2e2f' +
'303132333435363738393a3b3c3d3e3f' +
'404142434445464748494a4b4c4d4e4f' +
'505152535455565758595a5b5c5d5e5f' +
'606162636465666768696a6b6c6d6e6f' +
'707172737475767778797a7b7c7d7e7f' +
'808182838485868788898a8b8c8d8e8f' +
'909192939495969798999a9b9c9d9e9f' +
'a0a1a2a3a4a5a6a7a8a9aaabacadaeaf' +
'b0b1b2b3b4b5b6b7b8b9babbbcbdbebf' +
'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf' +
'd0d1d2d3d4d5d6d7d8d9dadbdcdddedf' +
'e0e1e2e3e4e5e6e7e8e9eaebecedeeef' +
'f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff');
console.log('Create buffer from hex string');
var hexb2 = Buffer.from(hexStr, 'hex');
for (let i = 0; i < 256; i++) {
assert.equal(hexb2[i], hexb[i]);
}
{
// test an invalid slice end.
console.log('Try to slice off the end of the buffer');
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.equal(b2, b3);
assert.equal(b2, b4);
}
function buildBuffer(data) {
if (Array.isArray(data)) {
var buffer = Buffer.allocUnsafe(data.length);
data.forEach(function(v, k) {
buffer[k] = v;
});
return buffer;
}
return null;
}
var x = buildBuffer([0x81, 0xa3, 0x66, 0x6f, 0x6f, 0xa3, 0x62, 0x61, 0x72]);
console.log(x.inspect());
assert.equal('<Buffer 81 a3 66 6f 6f a3 62 61 72>', x.inspect());
{
const z = x.slice(4);
console.log(z.inspect());
console.log(z.length);
assert.equal(5, z.length);
assert.equal(0x6f, z[0]);
assert.equal(0xa3, z[1]);
assert.equal(0x62, z[2]);
assert.equal(0x61, z[3]);
assert.equal(0x72, z[4]);
}
{
const z = x.slice(0);
console.log(z.inspect());
console.log(z.length);
assert.equal(z.length, x.length);
}
{
const z = x.slice(0, 4);
console.log(z.inspect());
console.log(z.length);
assert.equal(4, z.length);
assert.equal(0x81, z[0]);
assert.equal(0xa3, z[1]);
}
{
const z = x.slice(0, 9);
console.log(z.inspect());
console.log(z.length);
assert.equal(9, z.length);
}
{
const z = x.slice(1, 4);
console.log(z.inspect());
console.log(z.length);
assert.equal(3, z.length);
assert.equal(0xa3, z[0]);
}
{
const z = x.slice(2, 4);
console.log(z.inspect());
console.log(z.length);
assert.equal(2, z.length);
assert.equal(0x66, z[0]);
assert.equal(0x6f, z[1]);
}
assert.equal(0, Buffer.from('hello').slice(0, 0).length);
['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
const b = Buffer.allocUnsafe(10);
b.write('あいうえお', encoding);
assert.equal(b.toString(encoding), 'あいうえお');
});
{
// 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, 'binary');
assert.equal(0xff, b[0]);
assert.equal(0xad, b[1]);
assert.equal(0xbe, b[2]);
assert.equal(0xef, b[3]);
s = String.fromCharCode(0xaaee);
b.write(s, 0, 'binary');
assert.equal(0xee, b[0]);
assert.equal(0xad, b[1]);
assert.equal(0xbe, b[2]);
assert.equal(0xef, b[3]);
}
{
// #1210 Test UTF-8 string includes null character
let buf = Buffer.from('\0');
assert.equal(buf.length, 1);
buf = Buffer.from('\0\0');
assert.equal(buf.length, 2);
}
{
const buf = Buffer.allocUnsafe(2);
let written = buf.write(''); // 0byte
assert.equal(written, 0);
written = buf.write('\0'); // 1byte (v8 adds null terminator)
assert.equal(written, 1);
written = buf.write('a\0'); // 1byte * 2
assert.equal(written, 2);
written = buf.write('あ'); // 3bytes
assert.equal(written, 0);
written = buf.write('\0あ'); // 1byte + 3bytes
assert.equal(written, 1);
written = buf.write('\0\0あ'); // 1byte * 2 + 3bytes
assert.equal(written, 2);
}
{
const buf = Buffer.allocUnsafe(10);
written = buf.write('あいう'); // 3bytes * 3 (v8 adds null terminator)
assert.equal(written, 9);
written = buf.write('あいう\0'); // 3bytes * 3 + 1byte
assert.equal(written, 10);
}
{
// #243 Test write() with maxLength
const buf = Buffer.allocUnsafe(4);
buf.fill(0xFF);
let written = buf.write('abcd', 1, 2, 'utf8');
console.log(buf);
assert.equal(written, 2);
assert.equal(buf[0], 0xFF);
assert.equal(buf[1], 0x61);
assert.equal(buf[2], 0x62);
assert.equal(buf[3], 0xFF);
buf.fill(0xFF);
written = buf.write('abcd', 1, 4);
console.log(buf);
assert.equal(written, 3);
assert.equal(buf[0], 0xFF);
assert.equal(buf[1], 0x61);
assert.equal(buf[2], 0x62);
assert.equal(buf[3], 0x63);
buf.fill(0xFF);
written = buf.write('abcd', 'utf8', 1, 2); // legacy style
console.log(buf);
assert.equal(written, 2);
assert.equal(buf[0], 0xFF);
assert.equal(buf[1], 0x61);
assert.equal(buf[2], 0x62);
assert.equal(buf[3], 0xFF);
buf.fill(0xFF);
written = buf.write('abcdef', 1, 2, 'hex');
console.log(buf);
assert.equal(written, 2);
assert.equal(buf[0], 0xFF);
assert.equal(buf[1], 0xAB);
assert.equal(buf[2], 0xCD);
assert.equal(buf[3], 0xFF);
['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
buf.fill(0xFF);
written = buf.write('abcd', 0, 2, encoding);
console.log(buf);
assert.equal(written, 2);
assert.equal(buf[0], 0x61);
assert.equal(buf[1], 0x00);
assert.equal(buf[2], 0xFF);
assert.equal(buf[3], 0xFF);
});
}
{
// test offset returns are correct
const b = Buffer.allocUnsafe(16);
assert.equal(4, b.writeUInt32LE(0, 0));
assert.equal(6, b.writeUInt16LE(0, 4));
assert.equal(7, b.writeUInt8(0, 6));
assert.equal(8, b.writeInt8(0, 7));
assert.equal(16, b.writeDoubleLE(0, 8));
}
{
// 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.equal(buf[0], 0x61);
assert.equal(buf[1], 0x62);
assert.equal(buf[2], 0xef);
assert.equal(buf[3], 0xbf);
assert.equal(buf[4], 0xbd);
assert.equal(buf[5], 0x63);
assert.equal(buf[6], 0x64);
}
{
// test for buffer overrun
const buf = Buffer.from([0, 0, 0, 0, 0]); // length: 5
var sub = buf.slice(0, 4); // length: 4
written = sub.write('12345', 'binary');
assert.equal(written, 4);
assert.equal(buf[4], 0);
}
// 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
assert.equal(Buffer.allocUnsafe(-1).length, 0);
assert.equal(Buffer.allocUnsafe(NaN).length, 0);
assert.equal(Buffer.allocUnsafe(3.3).length, 3);
assert.equal(Buffer.from({length: 3.3}).length, 3);
assert.equal(Buffer.from({length: 'BAM'}).length, 0);
// Make sure that strings are not coerced to numbers.
assert.equal(Buffer.from('99').length, 2);
assert.equal(Buffer.from('13.37').length, 5);
// Ensure that the length argument is respected.
'ascii utf8 hex base64 binary'.split(' ').forEach(function(enc) {
assert.equal(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.equal(b.toString(), 'xxx');
}
// issue GH-3416
Buffer.from(Buffer.alloc(0), 0, 0);
[ 'hex',
'utf8',
'utf-8',
'ascii',
'binary',