1 var common = require('../common');
2 var assert = require('assert');
4 var Buffer = require('buffer').Buffer;
5 var SlowBuffer = require('buffer').SlowBuffer;
6 var smalloc = require('smalloc');
8 // counter to ensure unique value is always copied
11 var b = Buffer(1024); // safe constructor
13 console.log('b.length == %d', b.length);
14 assert.strictEqual(1024, b.length);
17 assert.strictEqual(b[0], 255);
19 for (var i = 0; i < 1024; i++) {
23 for (var i = 0; i < 1024; i++) {
24 assert.strictEqual(i % 256, b[i]);
27 var c = new Buffer(512);
28 console.log('c.length == %d', c.length);
29 assert.strictEqual(512, c.length);
31 // First check Buffer#fill() works as expected.
33 assert.throws(function() {
34 Buffer(8).fill('a', -1);
37 assert.throws(function() {
38 Buffer(8).fill('a', 0, 9);
41 // Make sure this doesn't hang indefinitely.
44 var buf = new Buffer(64);
46 for (var i = 0; i < buf.length; i++)
47 assert.equal(buf[i], 10);
49 buf.fill(11, 0, buf.length >> 1);
50 for (var i = 0; i < buf.length >> 1; i++)
51 assert.equal(buf[i], 11);
52 for (var i = (buf.length >> 1) + 1; i < buf.length; i++)
53 assert.equal(buf[i], 10);
56 for (var i = 0; i < buf.length; i++)
57 assert.equal('h'.charCodeAt(0), buf[i]);
60 for (var i = 0; i < buf.length; i++)
61 assert.equal(0, buf[i]);
64 for (var i = 0; i < buf.length; i++)
65 assert.equal(0, buf[i]);
68 for (var i = 0; i < 16; i++)
69 assert.equal(0, buf[i]);
71 assert.equal(1, buf[i]);
72 for (; i < buf.length; i++)
73 assert.equal(0, buf[i]);
75 var buf = new Buffer(10);
77 assert.equal(buf.toString(), 'abcabcabca');
79 assert.equal(buf.toString(), 'էէէէէ');
81 // copy 512 bytes, from 0 to 512.
84 var copied = b.copy(c, 0, 0, 512);
85 console.log('copied %d bytes from b into c', copied);
86 assert.strictEqual(512, copied);
87 for (var i = 0; i < c.length; i++) {
88 assert.strictEqual(b[i], c[i]);
91 // copy c into b, without specifying sourceEnd
94 var copied = c.copy(b, 0, 0);
95 console.log('copied %d bytes from c into b w/o sourceEnd', copied);
96 assert.strictEqual(c.length, copied);
97 for (var i = 0; i < c.length; i++) {
98 assert.strictEqual(c[i], b[i]);
101 // copy c into b, without specifying sourceStart
104 var copied = c.copy(b, 0);
105 console.log('copied %d bytes from c into b w/o sourceStart', copied);
106 assert.strictEqual(c.length, copied);
107 for (var i = 0; i < c.length; i++) {
108 assert.strictEqual(c[i], b[i]);
111 // copy longer buffer b to shorter c without targetStart
114 var copied = b.copy(c);
115 console.log('copied %d bytes from b into c w/o targetStart', copied);
116 assert.strictEqual(c.length, copied);
117 for (var i = 0; i < c.length; i++) {
118 assert.strictEqual(b[i], c[i]);
121 // copy starting near end of b to c
124 var copied = b.copy(c, 0, b.length - Math.floor(c.length / 2));
125 console.log('copied %d bytes from end of b into beginning of c', copied);
126 assert.strictEqual(Math.floor(c.length / 2), copied);
127 for (var i = 0; i < Math.floor(c.length / 2); i++) {
128 assert.strictEqual(b[b.length - Math.floor(c.length / 2) + i], c[i]);
130 for (var i = Math.floor(c.length /2) + 1; i < c.length; i++) {
131 assert.strictEqual(c[c.length-1], c[i]);
134 // try to copy 513 bytes, and check we don't overrun c
137 var copied = b.copy(c, 0, 0, 513);
138 console.log('copied %d bytes from b trying to overrun c', copied);
139 assert.strictEqual(c.length, copied);
140 for (var i = 0; i < c.length; i++) {
141 assert.strictEqual(b[i], c[i]);
144 // copy 768 bytes from b into b
147 var copied = b.copy(b, 0, 256, 1024);
148 console.log('copied %d bytes from b into b', copied);
149 assert.strictEqual(768, copied);
150 for (var i = 0; i < b.length; i++) {
151 assert.strictEqual(cntr, b[i]);
154 // copy string longer than buffer length (failure will segfault)
155 var bb = new Buffer(10);
156 bb.fill('hello crazy world');
159 var caught_error = null;
161 // try to copy from before the beginning of b
164 var copied = b.copy(c, 0, 100, 10);
169 // copy throws at negative sourceStart
170 assert.throws(function() {
171 Buffer(5).copy(Buffer(5), 0, -1);
174 // check sourceEnd resets to targetEnd if former is greater than the latter
177 var copied = b.copy(c, 0, 0, 1025);
178 console.log('copied %d bytes from b into c', copied);
179 for (var i = 0; i < c.length; i++) {
180 assert.strictEqual(b[i], c[i]);
183 // throw with negative sourceEnd
184 console.log('test copy at negative sourceEnd');
185 assert.throws(function() {
189 // when sourceStart is greater than sourceEnd, zero copied
190 assert.equal(b.copy(c, 0, 100, 10), 0);
192 // when targetStart > targetLength, zero copied
193 assert.equal(b.copy(c, 512, 0, 10), 0);
197 // invalid encoding for Buffer.toString
200 var copied = b.toString('invalid');
204 assert.strictEqual('Unknown encoding: invalid', caught_error.message);
206 // invalid encoding for Buffer.write
209 var copied = b.write('test string', 0, 5, 'invalid');
213 assert.strictEqual('Unknown encoding: invalid', caught_error.message);
215 // try to create 0-length buffers
217 new Buffer('', 'ascii');
218 new Buffer('', 'binary');
221 // try to write a 0-length string beyond the end of b
222 assert.throws(function() {
226 // throw when writing to negative offset
227 assert.throws(function() {
231 // throw when writing past bounds from the pool
232 assert.throws(function() {
236 // throw when writing to negative offset
237 assert.throws(function() {
241 // try to copy 0 bytes worth of data into an empty buffer
242 b.copy(new Buffer(0), 0, 0, 0);
244 // try to copy 0 bytes past the end of the target buffer
245 b.copy(new Buffer(0), 1, 1, 1);
246 b.copy(new Buffer(1), 1, 1, 1);
248 // try to copy 0 bytes from past the end of the source buffer
249 b.copy(new Buffer(1), 0, 2048, 2048);
251 // try to toString() a 0-length slice of a buffer, both within and without the
252 // valid buffer range
253 assert.equal(new Buffer('abc').toString('ascii', 0, 0), '');
254 assert.equal(new Buffer('abc').toString('ascii', -100, -100), '');
255 assert.equal(new Buffer('abc').toString('ascii', 100, 100), '');
257 // try toString() with a object as a encoding
258 assert.equal(new Buffer('abc').toString({toString: function() {
262 // testing for smart defaults and ability to pass string values as offset
263 var writeTest = new Buffer('abcdes');
264 writeTest.write('n', 'ascii');
265 writeTest.write('o', 'ascii', '1');
266 writeTest.write('d', '2', 'ascii');
267 writeTest.write('e', 3, 'ascii');
268 writeTest.write('j', 'ascii', 4);
269 assert.equal(writeTest.toString(), 'nodejs');
271 var asciiString = 'hello world';
273 for (var j = 0; j < 500; j++) {
275 for (var i = 0; i < asciiString.length; i++) {
276 b[i] = asciiString.charCodeAt(i);
278 var asciiSlice = b.toString('ascii', 0, asciiString.length);
279 assert.equal(asciiString, asciiSlice);
281 var written = b.write(asciiString, offset, 'ascii');
282 assert.equal(asciiString.length, written);
283 var asciiSlice = b.toString('ascii', offset, offset + asciiString.length);
284 assert.equal(asciiString, asciiSlice);
286 var sliceA = b.slice(offset, offset + asciiString.length);
287 var sliceB = b.slice(offset, offset + asciiString.length);
288 for (var i = 0; i < asciiString.length; i++) {
289 assert.equal(sliceA[i], sliceB[i]);
292 // TODO utf8 slice tests
296 for (var j = 0; j < 100; j++) {
297 var slice = b.slice(100, 150);
298 assert.equal(50, slice.length);
299 for (var i = 0; i < 50; i++) {
300 assert.equal(b[100 + i], slice[i]);
305 // make sure only top level parent propagates from allocPool
306 var b = new Buffer(5);
307 var c = b.slice(0, 4);
308 var d = c.slice(0, 2);
309 assert.equal(b.parent, c.parent);
310 assert.equal(b.parent, d.parent);
312 // also from a non-pooled instance
313 var b = new SlowBuffer(5);
314 var c = b.slice(0, 4);
315 var d = c.slice(0, 2);
316 assert.equal(b, c.parent);
317 assert.equal(b, d.parent);
321 // Bug regression test
322 var testValue = '\u00F6\u65E5\u672C\u8A9E'; // ö日本語
323 var buffer = new Buffer(32);
324 var size = buffer.write(testValue, 0, 'utf8');
325 console.log('bytes written to buffer: ' + size);
326 var slice = buffer.toString('utf8', 0, size);
327 assert.equal(slice, testValue);
331 var a = new Buffer(8);
332 for (var i = 0; i < 8; i++) a[i] = i;
333 var b = a.slice(4, 8);
334 assert.equal(4, b[0]);
335 assert.equal(5, b[1]);
336 assert.equal(6, b[2]);
337 assert.equal(7, b[3]);
338 var c = b.slice(2, 4);
339 assert.equal(6, c[0]);
340 assert.equal(7, c[1]);
343 var d = new Buffer([23, 42, 255]);
344 assert.equal(d.length, 3);
345 assert.equal(d[0], 23);
346 assert.equal(d[1], 42);
347 assert.equal(d[2], 255);
348 assert.deepEqual(d, new Buffer(d));
350 var e = new Buffer('über');
351 console.error('uber: \'%s\'', e.toString());
352 assert.deepEqual(e, new Buffer([195, 188, 98, 101, 114]));
354 var f = new Buffer('über', 'ascii');
355 console.error('f.length: %d (should be 4)', f.length);
356 assert.deepEqual(f, new Buffer([252, 98, 101, 114]));
358 ['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
359 var f = new Buffer('über', encoding);
360 console.error('f.length: %d (should be 8)', f.length);
361 assert.deepEqual(f, new Buffer([252, 0, 98, 0, 101, 0, 114, 0]));
363 var f = new Buffer('привет', encoding);
364 console.error('f.length: %d (should be 12)', f.length);
365 assert.deepEqual(f, new Buffer([63, 4, 64, 4, 56, 4, 50, 4, 53, 4, 66, 4]));
366 assert.equal(f.toString(encoding), 'привет');
368 var f = new Buffer([0, 0, 0, 0, 0]);
369 assert.equal(f.length, 5);
370 var size = f.write('あいうえお', encoding);
371 console.error('bytes written to buffer: %d (should be 4)', size);
372 assert.equal(size, 4);
373 assert.deepEqual(f, new Buffer([0x42, 0x30, 0x44, 0x30, 0x00]));
376 var f = new Buffer('\uD83D\uDC4D', 'utf-16le'); // THUMBS UP SIGN (U+1F44D)
377 assert.equal(f.length, 4);
378 assert.deepEqual(f, new Buffer('3DD84DDC', 'hex'));
381 var arrayIsh = {0: 0, 1: 1, 2: 2, 3: 3, length: 4};
382 var g = new Buffer(arrayIsh);
383 assert.deepEqual(g, new Buffer([0, 1, 2, 3]));
384 var strArrayIsh = {0: '0', 1: '1', 2: '2', 3: '3', length: 4};
385 g = new Buffer(strArrayIsh);
386 assert.deepEqual(g, new Buffer([0, 1, 2, 3]));
390 // Test toString('base64')
392 assert.equal('TWFu', (new Buffer('Man')).toString('base64'));
394 // test that regular and URL-safe base64 both work
395 var expected = [0xff, 0xff, 0xbe, 0xff, 0xef, 0xbf, 0xfb, 0xef, 0xff];
396 assert.deepEqual(Buffer('//++/++/++//', 'base64'), Buffer(expected));
397 assert.deepEqual(Buffer('__--_--_--__', 'base64'), Buffer(expected));
400 var quote = 'Man is distinguished, not only by his reason, but by this ' +
401 'singular passion from other animals, which is a lust ' +
402 'of the mind, that by a perseverance of delight in the continued ' +
403 'and indefatigable generation of knowledge, exceeds the short ' +
404 'vehemence of any carnal pleasure.';
405 var expected = 'TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24s' +
406 'IGJ1dCBieSB0aGlzIHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltY' +
407 'WxzLCB3aGljaCBpcyBhIGx1c3Qgb2YgdGhlIG1pbmQsIHRoYXQgYnkgYSBwZX' +
408 'JzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGludWVkIGFuZCBpbmR' +
409 'lZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo' +
410 'ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=';
411 assert.equal(expected, (new Buffer(quote)).toString('base64'));
414 b = new Buffer(1024);
415 var bytesWritten = b.write(expected, 0, 'base64');
416 assert.equal(quote.length, bytesWritten);
417 assert.equal(quote, b.toString('ascii', 0, quote.length));
419 // check that the base64 decoder ignores whitespace
420 var expectedWhite = expected.slice(0, 60) + ' \n' +
421 expected.slice(60, 120) + ' \n' +
422 expected.slice(120, 180) + ' \n' +
423 expected.slice(180, 240) + ' \n' +
424 expected.slice(240, 300) + '\n' +
425 expected.slice(300, 360) + '\n';
426 b = new Buffer(1024);
427 bytesWritten = b.write(expectedWhite, 0, 'base64');
428 assert.equal(quote.length, bytesWritten);
429 assert.equal(quote, b.toString('ascii', 0, quote.length));
431 // check that the base64 decoder on the constructor works
432 // even in the presence of whitespace.
433 b = new Buffer(expectedWhite, 'base64');
434 assert.equal(quote.length, b.length);
435 assert.equal(quote, b.toString('ascii', 0, quote.length));
437 // check that the base64 decoder ignores illegal chars
438 var expectedIllegal = expected.slice(0, 60) + ' \x80' +
439 expected.slice(60, 120) + ' \xff' +
440 expected.slice(120, 180) + ' \x00' +
441 expected.slice(180, 240) + ' \x98' +
442 expected.slice(240, 300) + '\x03' +
443 expected.slice(300, 360);
444 b = new Buffer(expectedIllegal, 'base64');
445 assert.equal(quote.length, b.length);
446 assert.equal(quote, b.toString('ascii', 0, quote.length));
449 assert.equal(new Buffer('', 'base64').toString(), '');
450 assert.equal(new Buffer('K', 'base64').toString(), '');
452 // multiple-of-4 with padding
453 assert.equal(new Buffer('Kg==', 'base64').toString(), '*');
454 assert.equal(new Buffer('Kio=', 'base64').toString(), '**');
455 assert.equal(new Buffer('Kioq', 'base64').toString(), '***');
456 assert.equal(new Buffer('KioqKg==', 'base64').toString(), '****');
457 assert.equal(new Buffer('KioqKio=', 'base64').toString(), '*****');
458 assert.equal(new Buffer('KioqKioq', 'base64').toString(), '******');
459 assert.equal(new Buffer('KioqKioqKg==', 'base64').toString(), '*******');
460 assert.equal(new Buffer('KioqKioqKio=', 'base64').toString(), '********');
461 assert.equal(new Buffer('KioqKioqKioq', 'base64').toString(), '*********');
462 assert.equal(new Buffer('KioqKioqKioqKg==', 'base64').toString(),
464 assert.equal(new Buffer('KioqKioqKioqKio=', 'base64').toString(),
466 assert.equal(new Buffer('KioqKioqKioqKioq', 'base64').toString(),
468 assert.equal(new Buffer('KioqKioqKioqKioqKg==', 'base64').toString(),
470 assert.equal(new Buffer('KioqKioqKioqKioqKio=', 'base64').toString(),
472 assert.equal(new Buffer('KioqKioqKioqKioqKioq', 'base64').toString(),
474 assert.equal(new Buffer('KioqKioqKioqKioqKioqKg==', 'base64').toString(),
476 assert.equal(new Buffer('KioqKioqKioqKioqKioqKio=', 'base64').toString(),
477 '*****************');
478 assert.equal(new Buffer('KioqKioqKioqKioqKioqKioq', 'base64').toString(),
479 '******************');
480 assert.equal(new Buffer('KioqKioqKioqKioqKioqKioqKg==', 'base64').toString(),
481 '*******************');
482 assert.equal(new Buffer('KioqKioqKioqKioqKioqKioqKio=', 'base64').toString(),
483 '********************');
485 // no padding, not a multiple of 4
486 assert.equal(new Buffer('Kg', 'base64').toString(), '*');
487 assert.equal(new Buffer('Kio', 'base64').toString(), '**');
488 assert.equal(new Buffer('KioqKg', 'base64').toString(), '****');
489 assert.equal(new Buffer('KioqKio', 'base64').toString(), '*****');
490 assert.equal(new Buffer('KioqKioqKg', 'base64').toString(), '*******');
491 assert.equal(new Buffer('KioqKioqKio', 'base64').toString(), '********');
492 assert.equal(new Buffer('KioqKioqKioqKg', 'base64').toString(), '**********');
493 assert.equal(new Buffer('KioqKioqKioqKio', 'base64').toString(), '***********');
494 assert.equal(new Buffer('KioqKioqKioqKioqKg', 'base64').toString(),
496 assert.equal(new Buffer('KioqKioqKioqKioqKio', 'base64').toString(),
498 assert.equal(new Buffer('KioqKioqKioqKioqKioqKg', 'base64').toString(),
500 assert.equal(new Buffer('KioqKioqKioqKioqKioqKio', 'base64').toString(),
501 '*****************');
502 assert.equal(new Buffer('KioqKioqKioqKioqKioqKioqKg', 'base64').toString(),
503 '*******************');
504 assert.equal(new Buffer('KioqKioqKioqKioqKioqKioqKio', 'base64').toString(),
505 '********************');
507 // handle padding graciously, multiple-of-4 or not
508 assert.equal(new Buffer('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw==',
509 'base64').length, 32);
510 assert.equal(new Buffer('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw=',
511 'base64').length, 32);
512 assert.equal(new Buffer('72INjkR5fchcxk9+VgdGPFJDxUBFR5/rMFsghgxADiw',
513 'base64').length, 32);
514 assert.equal(new Buffer('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg==',
515 'base64').length, 31);
516 assert.equal(new Buffer('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg=',
517 'base64').length, 31);
518 assert.equal(new Buffer('w69jACy6BgZmaFvv96HG6MYksWytuZu3T1FvGnulPg',
519 'base64').length, 31);
521 // This string encodes single '.' character in UTF-16
522 var dot = new Buffer('//4uAA==', 'base64');
523 assert.equal(dot[0], 0xff);
524 assert.equal(dot[1], 0xfe);
525 assert.equal(dot[2], 0x2e);
526 assert.equal(dot[3], 0x00);
527 assert.equal(dot.toString('base64'), '//4uAA==');
529 // Writing base64 at a position > 0 should not mangle the result.
531 // https://github.com/joyent/node/issues/402
532 var segments = ['TWFkbmVzcz8h', 'IFRoaXM=', 'IGlz', 'IG5vZGUuanMh'];
533 var buf = new Buffer(64);
536 for (var i = 0; i < segments.length; ++i) {
537 pos += b.write(segments[i], pos, 'base64');
539 assert.equal(b.toString('binary', 0, pos), 'Madness?! This is node.js!');
541 // Creating buffers larger than pool size.
542 var l = Buffer.poolSize + 5;
544 for (i = 0; i < l; i++) {
548 var b = new Buffer(s);
550 for (i = 0; i < l; i++) {
551 assert.equal('h'.charCodeAt(0), b[i]);
554 var sb = b.toString();
555 assert.equal(sb.length, s.length);
559 // Single argument slice
560 b = new Buffer('abcde');
561 assert.equal('bcde', b.slice(1).toString());
564 assert.equal(14, Buffer.byteLength('Il était tué'));
565 assert.equal(14, Buffer.byteLength('Il était tué', 'utf8'));
566 ['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
567 assert.equal(24, Buffer.byteLength('Il était tué', encoding));
569 assert.equal(12, Buffer.byteLength('Il était tué', 'ascii'));
570 assert.equal(12, Buffer.byteLength('Il était tué', 'binary'));
572 // slice(0,0).length === 0
573 assert.equal(0, Buffer('hello').slice(0, 0).length);
576 console.log('Create hex string from buffer');
577 var hexb = new Buffer(256);
578 for (var i = 0; i < 256; i++) {
581 var hexStr = hexb.toString('hex');
583 '000102030405060708090a0b0c0d0e0f' +
584 '101112131415161718191a1b1c1d1e1f' +
585 '202122232425262728292a2b2c2d2e2f' +
586 '303132333435363738393a3b3c3d3e3f' +
587 '404142434445464748494a4b4c4d4e4f' +
588 '505152535455565758595a5b5c5d5e5f' +
589 '606162636465666768696a6b6c6d6e6f' +
590 '707172737475767778797a7b7c7d7e7f' +
591 '808182838485868788898a8b8c8d8e8f' +
592 '909192939495969798999a9b9c9d9e9f' +
593 'a0a1a2a3a4a5a6a7a8a9aaabacadaeaf' +
594 'b0b1b2b3b4b5b6b7b8b9babbbcbdbebf' +
595 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf' +
596 'd0d1d2d3d4d5d6d7d8d9dadbdcdddedf' +
597 'e0e1e2e3e4e5e6e7e8e9eaebecedeeef' +
598 'f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff');
600 console.log('Create buffer from hex string');
601 var hexb2 = new Buffer(hexStr, 'hex');
602 for (var i = 0; i < 256; i++) {
603 assert.equal(hexb2[i], hexb[i]);
606 // test an invalid slice end.
607 console.log('Try to slice off the end of the buffer');
608 var b = new Buffer([1, 2, 3, 4, 5]);
609 var b2 = b.toString('hex', 1, 10000);
610 var b3 = b.toString('hex', 1, 5);
611 var b4 = b.toString('hex', 1);
612 assert.equal(b2, b3);
613 assert.equal(b2, b4);
616 function buildBuffer(data) {
617 if (Array.isArray(data)) {
618 var buffer = new Buffer(data.length);
619 data.forEach(function(v, k) {
627 var x = buildBuffer([0x81, 0xa3, 0x66, 0x6f, 0x6f, 0xa3, 0x62, 0x61, 0x72]);
629 console.log(x.inspect());
630 assert.equal('<Buffer 81 a3 66 6f 6f a3 62 61 72>', x.inspect());
633 console.log(z.inspect());
634 console.log(z.length);
635 assert.equal(5, z.length);
636 assert.equal(0x6f, z[0]);
637 assert.equal(0xa3, z[1]);
638 assert.equal(0x62, z[2]);
639 assert.equal(0x61, z[3]);
640 assert.equal(0x72, z[4]);
643 console.log(z.inspect());
644 console.log(z.length);
645 assert.equal(z.length, x.length);
647 var z = x.slice(0, 4);
648 console.log(z.inspect());
649 console.log(z.length);
650 assert.equal(4, z.length);
651 assert.equal(0x81, z[0]);
652 assert.equal(0xa3, z[1]);
654 var z = x.slice(0, 9);
655 console.log(z.inspect());
656 console.log(z.length);
657 assert.equal(9, z.length);
659 var z = x.slice(1, 4);
660 console.log(z.inspect());
661 console.log(z.length);
662 assert.equal(3, z.length);
663 assert.equal(0xa3, z[0]);
665 var z = x.slice(2, 4);
666 console.log(z.inspect());
667 console.log(z.length);
668 assert.equal(2, z.length);
669 assert.equal(0x66, z[0]);
670 assert.equal(0x6f, z[1]);
672 assert.equal(0, Buffer('hello').slice(0, 0).length);
674 ['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
675 var b = new Buffer(10);
676 b.write('あいうえお', encoding);
677 assert.equal(b.toString(encoding), 'あいうえお');
680 // Binary encoding should write only one byte per character.
681 var b = Buffer([0xde, 0xad, 0xbe, 0xef]);
682 var s = String.fromCharCode(0xffff);
683 b.write(s, 0, 'binary');
684 assert.equal(0xff, b[0]);
685 assert.equal(0xad, b[1]);
686 assert.equal(0xbe, b[2]);
687 assert.equal(0xef, b[3]);
688 s = String.fromCharCode(0xaaee);
689 b.write(s, 0, 'binary');
690 assert.equal(0xee, b[0]);
691 assert.equal(0xad, b[1]);
692 assert.equal(0xbe, b[2]);
693 assert.equal(0xef, b[3]);
695 // #1210 Test UTF-8 string includes null character
696 var buf = new Buffer('\0');
697 assert.equal(buf.length, 1);
698 buf = new Buffer('\0\0');
699 assert.equal(buf.length, 2);
702 var written = buf.write(''); // 0byte
703 assert.equal(written, 0);
704 written = buf.write('\0'); // 1byte (v8 adds null terminator)
705 assert.equal(written, 1);
706 written = buf.write('a\0'); // 1byte * 2
707 assert.equal(written, 2);
708 written = buf.write('あ'); // 3bytes
709 assert.equal(written, 0);
710 written = buf.write('\0あ'); // 1byte + 3bytes
711 assert.equal(written, 1);
712 written = buf.write('\0\0あ'); // 1byte * 2 + 3bytes
713 assert.equal(written, 2);
715 buf = new Buffer(10);
716 written = buf.write('あいう'); // 3bytes * 3 (v8 adds null terminator)
717 assert.equal(written, 9);
718 written = buf.write('あいう\0'); // 3bytes * 3 + 1byte
719 assert.equal(written, 10);
721 // #243 Test write() with maxLength
722 var buf = new Buffer(4);
724 var written = buf.write('abcd', 1, 2, 'utf8');
726 assert.equal(written, 2);
727 assert.equal(buf[0], 0xFF);
728 assert.equal(buf[1], 0x61);
729 assert.equal(buf[2], 0x62);
730 assert.equal(buf[3], 0xFF);
733 written = buf.write('abcd', 1, 4);
735 assert.equal(written, 3);
736 assert.equal(buf[0], 0xFF);
737 assert.equal(buf[1], 0x61);
738 assert.equal(buf[2], 0x62);
739 assert.equal(buf[3], 0x63);
742 written = buf.write('abcd', 'utf8', 1, 2); // legacy style
744 assert.equal(written, 2);
745 assert.equal(buf[0], 0xFF);
746 assert.equal(buf[1], 0x61);
747 assert.equal(buf[2], 0x62);
748 assert.equal(buf[3], 0xFF);
751 written = buf.write('abcdef', 1, 2, 'hex');
753 assert.equal(written, 2);
754 assert.equal(buf[0], 0xFF);
755 assert.equal(buf[1], 0xAB);
756 assert.equal(buf[2], 0xCD);
757 assert.equal(buf[3], 0xFF);
759 ['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
761 written = buf.write('abcd', 0, 2, encoding);
763 assert.equal(written, 2);
764 assert.equal(buf[0], 0x61);
765 assert.equal(buf[1], 0x00);
766 assert.equal(buf[2], 0xFF);
767 assert.equal(buf[3], 0xFF);
770 // test offset returns are correct
771 var b = new Buffer(16);
772 assert.equal(4, b.writeUInt32LE(0, 0));
773 assert.equal(6, b.writeUInt16LE(0, 4));
774 assert.equal(7, b.writeUInt8(0, 6));
775 assert.equal(8, b.writeInt8(0, 7));
776 assert.equal(16, b.writeDoubleLE(0, 8));
778 // test unmatched surrogates not producing invalid utf8 output
779 // ef bf bd = utf-8 representation of unicode replacement character
780 // see https://codereview.chromium.org/121173009/
781 buf = new Buffer('ab\ud800cd', 'utf8');
782 assert.equal(buf[0], 0x61);
783 assert.equal(buf[1], 0x62);
784 assert.equal(buf[2], 0xef);
785 assert.equal(buf[3], 0xbf);
786 assert.equal(buf[4], 0xbd);
787 assert.equal(buf[5], 0x63);
788 assert.equal(buf[6], 0x64);
790 // test for buffer overrun
791 buf = new Buffer([0, 0, 0, 0, 0]); // length: 5
792 var sub = buf.slice(0, 4); // length: 4
793 written = sub.write('12345', 'binary');
794 assert.equal(written, 4);
795 assert.equal(buf[4], 0);
797 // Check for fractional length args, junk length args, etc.
798 // https://github.com/joyent/node/issues/1758
799 Buffer(3.3).toString(); // throws bad argument error in commit 43cb4ec
800 assert.equal(Buffer(-1).length, 0);
801 assert.equal(Buffer(NaN).length, 0);
802 assert.equal(Buffer(3.3).length, 3);
803 assert.equal(Buffer({length: 3.3}).length, 3);
804 assert.equal(Buffer({length: 'BAM'}).length, 0);
806 // Make sure that strings are not coerced to numbers.
807 assert.equal(Buffer('99').length, 2);
808 assert.equal(Buffer('13.37').length, 5);
810 // Ensure that the length argument is respected.
811 'ascii utf8 hex base64 binary'.split(' ').forEach(function(enc) {
812 assert.equal(Buffer(1).write('aaaaaa', 0, 1, enc), 1);
815 // Regression test, guard against buffer overrun in the base64 decoder.
817 var b = Buffer('xxx');
818 a.write('aaaaaaaa', 'base64');
819 assert.equal(b.toString(), 'xxx');
822 Buffer(Buffer(0), 0, 0);
833 'utf-16le' ].forEach(function(enc) {
834 assert.equal(Buffer.isEncoding(enc), true);
840 'new gnu gun' ].forEach(function(enc) {
841 assert.equal(Buffer.isEncoding(enc), false);
847 var buffer = new Buffer('test'),
848 string = JSON.stringify(buffer);
850 assert.equal(string, '{"type":"Buffer","data":[116,101,115,116]}');
852 assert.deepEqual(buffer, JSON.parse(string, function(key, value) {
853 return value && value.type === 'Buffer'
854 ? new Buffer(value.data)
861 var buf = new Buffer('test');
862 var json = JSON.stringify(buf);
863 var obj = JSON.parse(json);
864 var copy = new Buffer(obj);
866 assert(buf.equals(copy));
870 assert.throws(function() {
871 new Buffer(0xFFFFFFFF);
873 assert.throws(function() {
874 new Buffer(0xFFFFFFFFF);
878 // attempt to overflow buffers, similar to previous bug in array buffers
879 assert.throws(function() {
880 var buf = new Buffer(8);
881 buf.readFloatLE(0xffffffff);
884 assert.throws(function() {
885 var buf = new Buffer(8);
886 buf.writeFloatLE(0.0, 0xffffffff);
889 assert.throws(function() {
890 var buf = new Buffer(8);
891 buf.readFloatLE(0xffffffff);
894 assert.throws(function() {
895 var buf = new Buffer(8);
896 buf.writeFloatLE(0.0, 0xffffffff);
900 // ensure negative values can't get past offset
901 assert.throws(function() {
902 var buf = new Buffer(8);
906 assert.throws(function() {
907 var buf = new Buffer(8);
908 buf.writeFloatLE(0.0, -1);
911 assert.throws(function() {
912 var buf = new Buffer(8);
916 assert.throws(function() {
917 var buf = new Buffer(8);
918 buf.writeFloatLE(0.0, -1);
922 var buf = new Buffer(0);
924 assert.throws(function() { buf.readUInt8(0); }, RangeError);
925 assert.throws(function() { buf.readInt8(0); }, RangeError);
927 var buf = new Buffer([0xFF]);
929 assert.equal(buf.readUInt8(0), 255);
930 assert.equal(buf.readInt8(0), -1);
932 [16, 32].forEach(function(bits) {
933 var buf = new Buffer(bits / 8 - 1);
935 assert.throws(function() { buf['readUInt' + bits + 'BE'](0); },
937 'readUInt' + bits + 'BE');
939 assert.throws(function() { buf['readUInt' + bits + 'LE'](0); },
941 'readUInt' + bits + 'LE');
943 assert.throws(function() { buf['readInt' + bits + 'BE'](0); },
945 'readInt' + bits + 'BE()');
947 assert.throws(function() { buf['readInt' + bits + 'LE'](0); },
949 'readInt' + bits + 'LE()');
952 [16, 32].forEach(function(bits) {
953 var buf = new Buffer([0xFF, 0xFF, 0xFF, 0xFF]);
955 assert.equal(buf['readUInt' + bits + 'BE'](0),
956 (0xFFFFFFFF >>> (32 - bits)));
958 assert.equal(buf['readUInt' + bits + 'LE'](0),
959 (0xFFFFFFFF >>> (32 - bits)));
961 assert.equal(buf['readInt' + bits + 'BE'](0),
962 (0xFFFFFFFF >> (32 - bits)));
964 assert.equal(buf['readInt' + bits + 'LE'](0),
965 (0xFFFFFFFF >> (32 - bits)));
968 // test for common read(U)IntLE/BE
970 var buf = new Buffer([0x01, 0x02, 0x03, 0x04, 0x05, 0x06]);
972 assert.equal(buf.readUIntLE(0, 1), 0x01);
973 assert.equal(buf.readUIntBE(0, 1), 0x01);
974 assert.equal(buf.readUIntLE(0, 3), 0x030201);
975 assert.equal(buf.readUIntBE(0, 3), 0x010203);
976 assert.equal(buf.readUIntLE(0, 5), 0x0504030201);
977 assert.equal(buf.readUIntBE(0, 5), 0x0102030405);
978 assert.equal(buf.readUIntLE(0, 6), 0x060504030201);
979 assert.equal(buf.readUIntBE(0, 6), 0x010203040506);
980 assert.equal(buf.readIntLE(0, 1), 0x01);
981 assert.equal(buf.readIntBE(0, 1), 0x01);
982 assert.equal(buf.readIntLE(0, 3), 0x030201);
983 assert.equal(buf.readIntBE(0, 3), 0x010203);
984 assert.equal(buf.readIntLE(0, 5), 0x0504030201);
985 assert.equal(buf.readIntBE(0, 5), 0x0102030405);
986 assert.equal(buf.readIntLE(0, 6), 0x060504030201);
987 assert.equal(buf.readIntBE(0, 6), 0x010203040506);
990 // test for common write(U)IntLE/BE
992 var buf = new Buffer(3);
993 buf.writeUIntLE(0x123456, 0, 3);
994 assert.deepEqual(buf.toJSON().data, [0x56, 0x34, 0x12]);
995 assert.equal(buf.readUIntLE(0, 3), 0x123456);
998 buf.writeUIntBE(0x123456, 0, 3);
999 assert.deepEqual(buf.toJSON().data, [0x12, 0x34, 0x56]);
1000 assert.equal(buf.readUIntBE(0, 3), 0x123456);
1002 buf = new Buffer(3);
1003 buf.writeIntLE(0x123456, 0, 3);
1004 assert.deepEqual(buf.toJSON().data, [0x56, 0x34, 0x12]);
1005 assert.equal(buf.readIntLE(0, 3), 0x123456);
1007 buf = new Buffer(3);
1008 buf.writeIntBE(0x123456, 0, 3);
1009 assert.deepEqual(buf.toJSON().data, [0x12, 0x34, 0x56]);
1010 assert.equal(buf.readIntBE(0, 3), 0x123456);
1012 buf = new Buffer(3);
1013 buf.writeIntLE(-0x123456, 0, 3);
1014 assert.deepEqual(buf.toJSON().data, [0xaa, 0xcb, 0xed]);
1015 assert.equal(buf.readIntLE(0, 3), -0x123456);
1017 buf = new Buffer(3);
1018 buf.writeIntBE(-0x123456, 0, 3);
1019 assert.deepEqual(buf.toJSON().data, [0xed, 0xcb, 0xaa]);
1020 assert.equal(buf.readIntBE(0, 3), -0x123456);
1022 buf = new Buffer(5);
1023 buf.writeUIntLE(0x1234567890, 0, 5);
1024 assert.deepEqual(buf.toJSON().data, [0x90, 0x78, 0x56, 0x34, 0x12]);
1025 assert.equal(buf.readUIntLE(0, 5), 0x1234567890);
1027 buf = new Buffer(5);
1028 buf.writeUIntBE(0x1234567890, 0, 5);
1029 assert.deepEqual(buf.toJSON().data, [0x12, 0x34, 0x56, 0x78, 0x90]);
1030 assert.equal(buf.readUIntBE(0, 5), 0x1234567890);
1032 buf = new Buffer(5);
1033 buf.writeIntLE(0x1234567890, 0, 5);
1034 assert.deepEqual(buf.toJSON().data, [0x90, 0x78, 0x56, 0x34, 0x12]);
1035 assert.equal(buf.readIntLE(0, 5), 0x1234567890);
1037 buf = new Buffer(5);
1038 buf.writeIntBE(0x1234567890, 0, 5);
1039 assert.deepEqual(buf.toJSON().data, [0x12, 0x34, 0x56, 0x78, 0x90]);
1040 assert.equal(buf.readIntBE(0, 5), 0x1234567890);
1042 buf = new Buffer(5);
1043 buf.writeIntLE(-0x1234567890, 0, 5);
1044 assert.deepEqual(buf.toJSON().data, [0x70, 0x87, 0xa9, 0xcb, 0xed]);
1045 assert.equal(buf.readIntLE(0, 5), -0x1234567890);
1047 buf = new Buffer(5);
1048 buf.writeIntBE(-0x1234567890, 0, 5);
1049 assert.deepEqual(buf.toJSON().data, [0xed, 0xcb, 0xa9, 0x87, 0x70]);
1050 assert.equal(buf.readIntBE(0, 5), -0x1234567890);
1053 // test Buffer slice
1055 var buf = new Buffer('0123456789');
1056 assert.equal(buf.slice(-10, 10), '0123456789');
1057 assert.equal(buf.slice(-20, 10), '0123456789');
1058 assert.equal(buf.slice(-20, -10), '');
1059 assert.equal(buf.slice(0, -1), '012345678');
1060 assert.equal(buf.slice(2, -2), '234567');
1061 assert.equal(buf.slice(0, 65536), '0123456789');
1062 assert.equal(buf.slice(65536, 0), '');
1063 for (var i = 0, s = buf.toString(); i < buf.length; ++i) {
1064 assert.equal(buf.slice(-i), s.slice(-i));
1065 assert.equal(buf.slice(0, -i), s.slice(0, -i));
1067 // try to slice a zero length Buffer
1068 // see https://github.com/joyent/node/issues/5881
1069 SlowBuffer(0).slice(0, 1);
1070 // make sure a zero length slice doesn't set the .parent attribute
1071 assert.equal(Buffer(5).slice(0,0).parent, undefined);
1072 // and make sure a proper slice does have a parent
1073 assert.ok(typeof Buffer(5).slice(0, 5).parent === 'object');
1076 // Make sure byteLength properly checks for base64 padding
1077 assert.equal(Buffer.byteLength('aaa=', 'base64'), 2);
1078 assert.equal(Buffer.byteLength('aaaa==', 'base64'), 3);
1080 // Regression test for #5482: should throw but not assert in C++ land.
1081 assert.throws(function() {
1082 Buffer('', 'buffer');
1085 // Regression test for #6111. Constructing a buffer from another buffer
1086 // should a) work, and b) not corrupt the source buffer.
1089 for (var i = 0; i < 7; ++i) a = a.concat(a);
1090 a = a.map(function(_, i) { return i });
1093 assert.equal(b.length, a.length);
1094 assert.equal(c.length, a.length);
1095 for (var i = 0, k = a.length; i < k; ++i) {
1096 assert.equal(a[i], i);
1097 assert.equal(b[i], i);
1098 assert.equal(c[i], i);
1103 assert.throws(function () {
1104 new Buffer(smalloc.kMaxLength + 1);
1107 assert.throws(function () {
1108 new SlowBuffer(smalloc.kMaxLength + 1);
1111 if (common.hasCrypto) {
1112 // Test truncation after decode
1113 var crypto = require('crypto');
1115 var b1 = new Buffer('YW55=======', 'base64');
1116 var b2 = new Buffer('YW55', 'base64');
1119 crypto.createHash('sha1').update(b1).digest('hex'),
1120 crypto.createHash('sha1').update(b2).digest('hex')
1123 console.log('1..0 # Skipped: missing crypto');
1127 var b = new Buffer(1).fill('a');
1128 var c = new Buffer(1).fill('c');
1129 var d = new Buffer(2).fill('aa');
1131 assert.equal(b.compare(c), -1);
1132 assert.equal(c.compare(d), 1);
1133 assert.equal(d.compare(b), 1);
1134 assert.equal(b.compare(d), -1);
1135 assert.equal(b.compare(b), 0);
1137 assert.equal(Buffer.compare(b, c), -1);
1138 assert.equal(Buffer.compare(c, d), 1);
1139 assert.equal(Buffer.compare(d, b), 1);
1140 assert.equal(Buffer.compare(b, d), -1);
1141 assert.equal(Buffer.compare(c, c), 0);
1144 assert.throws(function() {
1145 var b = new Buffer(1);
1146 Buffer.compare(b, 'abc');
1149 assert.throws(function() {
1150 var b = new Buffer(1);
1151 Buffer.compare('abc', b);
1154 assert.throws(function() {
1155 var b = new Buffer(1);
1160 var b = new Buffer(5).fill('abcdf');
1161 var c = new Buffer(5).fill('abcdf');
1162 var d = new Buffer(5).fill('abcde');
1163 var e = new Buffer(6).fill('abcdef');
1165 assert.ok(b.equals(c));
1166 assert.ok(!c.equals(d));
1167 assert.ok(!d.equals(e));
1168 assert.ok(d.equals(d));
1170 assert.throws(function() {
1171 var b = new Buffer(1);
1175 // Regression test for https://github.com/iojs/io.js/issues/649.
1176 assert.throws(function() { Buffer(1422561062959).toString('utf8'); });
1178 var ps = Buffer.poolSize;
1179 Buffer.poolSize = 0;
1180 assert.equal(Buffer(1).parent, undefined);
1181 Buffer.poolSize = ps;
1183 // Test Buffer.copy() segfault
1184 assert.throws(function() {