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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>
60 lines
1.3 KiB
JavaScript
60 lines
1.3 KiB
JavaScript
'use strict';
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require('../common');
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var assert = require('assert');
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// This test verifies that stream.unshift(Buffer.alloc(0)) or
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// stream.unshift('') does not set state.reading=false.
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var Readable = require('stream').Readable;
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var r = new Readable();
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var nChunks = 10;
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var chunk = Buffer.alloc(10, 'x');
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r._read = function(n) {
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setTimeout(function() {
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r.push(--nChunks === 0 ? null : chunk);
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});
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};
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var readAll = false;
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var seen = [];
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r.on('readable', function() {
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var chunk;
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while (chunk = r.read()) {
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seen.push(chunk.toString());
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// simulate only reading a certain amount of the data,
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// and then putting the rest of the chunk back into the
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// stream, like a parser might do. We just fill it with
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// 'y' so that it's easy to see which bits were touched,
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// and which were not.
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var putBack = Buffer.alloc(readAll ? 0 : 5, 'y');
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readAll = !readAll;
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r.unshift(putBack);
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}
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});
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var expect =
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[ 'xxxxxxxxxx',
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'yyyyy',
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'xxxxxxxxxx',
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'yyyyy',
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'xxxxxxxxxx',
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'yyyyy',
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'xxxxxxxxxx',
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'yyyyy',
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'xxxxxxxxxx',
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'yyyyy',
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'xxxxxxxxxx',
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'yyyyy',
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'xxxxxxxxxx',
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'yyyyy',
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'xxxxxxxxxx',
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'yyyyy',
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'xxxxxxxxxx',
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'yyyyy' ];
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r.on('end', function() {
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assert.deepEqual(seen, expect);
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console.log('ok');
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});
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