mirror of
https://github.com/nodejs/node.git
synced 2026-10-14 10:26:26 -04:00
James M Snell
85ab4a5f12
Several changes:
* Soft-Deprecate Buffer() constructors
* Add `Buffer.from()`, `Buffer.alloc()`, and `Buffer.allocUnsafe()`
* Add `--zero-fill-buffers` command line option
* Add byteOffset and length to `new Buffer(arrayBuffer)` constructor
* buffer.fill('') previously had no effect, now zero-fills
* Update the docs
PR-URL: https://github.com/nodejs/node/pull/4682
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
53 lines
2.1 KiB
JavaScript
53 lines
2.1 KiB
JavaScript
'use strict';
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require('../common');
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var assert = require('assert');
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var Buffer = require('buffer').Buffer;
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// coerce values to string
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assert.equal(Buffer.byteLength(32, 'binary'), 2);
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assert.equal(Buffer.byteLength(NaN, 'utf8'), 3);
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assert.equal(Buffer.byteLength({}, 'binary'), 15);
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assert.equal(Buffer.byteLength(), 9);
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// buffer
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var incomplete = Buffer.from([0xe4, 0xb8, 0xad, 0xe6, 0x96]);
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assert.equal(Buffer.byteLength(incomplete), 5);
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var ascii = Buffer.from('abc');
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assert.equal(Buffer.byteLength(ascii), 3);
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// special case: zero length string
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assert.equal(Buffer.byteLength('', 'ascii'), 0);
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assert.equal(Buffer.byteLength('', 'HeX'), 0);
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// utf8
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assert.equal(Buffer.byteLength('∑éllö wørl∂!', 'utf-8'), 19);
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assert.equal(Buffer.byteLength('κλμνξο', 'utf8'), 12);
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assert.equal(Buffer.byteLength('挵挶挷挸挹', 'utf-8'), 15);
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assert.equal(Buffer.byteLength('𠝹𠱓𠱸', 'UTF8'), 12);
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// without an encoding, utf8 should be assumed
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assert.equal(Buffer.byteLength('hey there'), 9);
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assert.equal(Buffer.byteLength('𠱸挶νξ#xx :)'), 17);
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assert.equal(Buffer.byteLength('hello world', ''), 11);
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// it should also be assumed with unrecognized encoding
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assert.equal(Buffer.byteLength('hello world', 'abc'), 11);
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assert.equal(Buffer.byteLength('ßœ∑≈', 'unkn0wn enc0ding'), 10);
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// base64
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assert.equal(Buffer.byteLength('aGVsbG8gd29ybGQ=', 'base64'), 11);
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assert.equal(Buffer.byteLength('bm9kZS5qcyByb2NrcyE=', 'base64'), 14);
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assert.equal(Buffer.byteLength('aGkk', 'base64'), 3);
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assert.equal(Buffer.byteLength('bHNrZGZsa3NqZmtsc2xrZmFqc2RsZmtqcw==',
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'base64'), 25);
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// special padding
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assert.equal(Buffer.byteLength('aaa=', 'base64'), 2);
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assert.equal(Buffer.byteLength('aaaa==', 'base64'), 3);
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assert.equal(Buffer.byteLength('Il était tué'), 14);
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assert.equal(Buffer.byteLength('Il était tué', 'utf8'), 14);
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assert.equal(Buffer.byteLength('Il était tué', 'ascii'), 12);
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assert.equal(Buffer.byteLength('Il était tué', 'binary'), 12);
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['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
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assert.equal(24, Buffer.byteLength('Il était tué', encoding));
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});
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