| // Copyright Joyent, Inc. and other Node contributors. |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a |
| // copy of this software and associated documentation files (the |
| // "Software"), to deal in the Software without restriction, including |
| // without limitation the rights to use, copy, modify, merge, publish, |
| // distribute, sublicense, and/or sell copies of the Software, and to permit |
| // persons to whom the Software is furnished to do so, subject to the |
| // following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included |
| // in all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN |
| // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
| // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| // USE OR OTHER DEALINGS IN THE SOFTWARE. |
| |
| var common = require('../common'); |
| var assert = require('assert'); |
| |
| // This test verifies that stream.unshift(Buffer(0)) or |
| // stream.unshift('') does not set state.reading=false. |
| var Readable = require('stream').Readable; |
| |
| var r = new Readable(); |
| var nChunks = 10; |
| var chunk = new Buffer(10); |
| chunk.fill('x'); |
| |
| r._read = function(n) { |
| setTimeout(function() { |
| r.push(--nChunks === 0 ? null : chunk); |
| }); |
| }; |
| |
| var readAll = false; |
| var seen = []; |
| r.on('readable', function() { |
| var chunk; |
| while (chunk = r.read()) { |
| seen.push(chunk.toString()); |
| // simulate only reading a certain amount of the data, |
| // and then putting the rest of the chunk back into the |
| // stream, like a parser might do. We just fill it with |
| // 'y' so that it's easy to see which bits were touched, |
| // and which were not. |
| var putBack = new Buffer(readAll ? 0 : 5); |
| putBack.fill('y'); |
| readAll = !readAll; |
| r.unshift(putBack); |
| } |
| }); |
| |
| var expect = |
| [ 'xxxxxxxxxx', |
| 'yyyyy', |
| 'xxxxxxxxxx', |
| 'yyyyy', |
| 'xxxxxxxxxx', |
| 'yyyyy', |
| 'xxxxxxxxxx', |
| 'yyyyy', |
| 'xxxxxxxxxx', |
| 'yyyyy', |
| 'xxxxxxxxxx', |
| 'yyyyy', |
| 'xxxxxxxxxx', |
| 'yyyyy', |
| 'xxxxxxxxxx', |
| 'yyyyy', |
| 'xxxxxxxxxx', |
| 'yyyyy' ]; |
| |
| r.on('end', function() { |
| assert.deepEqual(seen, expect); |
| console.log('ok'); |
| }); |