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>
57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
'use strict';
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require('../common');
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const assert = require('assert');
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const buffer = require('buffer');
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const Buffer = buffer.Buffer;
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const SlowBuffer = buffer.SlowBuffer;
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const ones = [1, 1, 1, 1];
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// should create a Buffer
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let sb = SlowBuffer(4);
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assert(sb instanceof Buffer);
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assert.strictEqual(sb.length, 4);
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sb.fill(1);
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assert.deepEqual(sb, ones);
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// underlying ArrayBuffer should have the same length
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assert.strictEqual(sb.buffer.byteLength, 4);
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// should work without new
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sb = SlowBuffer(4);
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assert(sb instanceof Buffer);
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assert.strictEqual(sb.length, 4);
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sb.fill(1);
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assert.deepEqual(sb, ones);
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// should work with edge cases
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assert.strictEqual(SlowBuffer(0).length, 0);
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try {
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assert.strictEqual(
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SlowBuffer(buffer.kMaxLength).length, buffer.kMaxLength);
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} catch (e) {
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assert.equal(e.message, 'Array buffer allocation failed');
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}
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// should work with number-coercible values
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assert.strictEqual(SlowBuffer('6').length, 6);
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assert.strictEqual(SlowBuffer(true).length, 1);
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// should create zero-length buffer if parameter is not a number
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assert.strictEqual(SlowBuffer().length, 0);
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assert.strictEqual(SlowBuffer(NaN).length, 0);
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assert.strictEqual(SlowBuffer({}).length, 0);
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assert.strictEqual(SlowBuffer('string').length, 0);
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// should throw with invalid length
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assert.throws(function() {
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SlowBuffer(Infinity);
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}, 'invalid Buffer length');
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assert.throws(function() {
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SlowBuffer(-1);
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}, 'invalid Buffer length');
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assert.throws(function() {
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SlowBuffer(buffer.kMaxLength + 1);
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}, 'invalid Buffer length');
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