| // 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'); |
| var stream = require('stream'); |
| var str = 'asdfasdfasdfasdfasdf'; |
| |
| var r = new stream.Readable({ |
| highWaterMark: 5, |
| encoding: 'utf8' |
| }); |
| |
| var reads = 0; |
| var eofed = false; |
| var ended = false; |
| |
| r._read = function(n) { |
| if (reads === 0) { |
| setTimeout(function() { |
| r.push(str); |
| }); |
| reads++; |
| } else if (reads === 1) { |
| var ret = r.push(str); |
| assert.equal(ret, false); |
| reads++; |
| } else { |
| assert(!eofed); |
| eofed = true; |
| r.push(null); |
| } |
| }; |
| |
| r.on('end', function() { |
| ended = true; |
| }); |
| |
| // push some data in to start. |
| // we've never gotten any read event at this point. |
| var ret = r.push(str); |
| // should be false. > hwm |
| assert(!ret); |
| var chunk = r.read(); |
| assert.equal(chunk, str); |
| chunk = r.read(); |
| assert.equal(chunk, null); |
| |
| r.once('readable', function() { |
| // this time, we'll get *all* the remaining data, because |
| // it's been added synchronously, as the read WOULD take |
| // us below the hwm, and so it triggered a _read() again, |
| // which synchronously added more, which we then return. |
| chunk = r.read(); |
| assert.equal(chunk, str + str); |
| |
| chunk = r.read(); |
| assert.equal(chunk, null); |
| }); |
| |
| process.on('exit', function() { |
| assert(eofed); |
| assert(ended); |
| assert.equal(reads, 2); |
| console.log('ok'); |
| }); |