| // 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. |
| |
| // Test that having a bunch of streams piping in parallel |
| // doesn't break anything. |
| |
| var common = require('../common'); |
| var assert = require('assert'); |
| var Stream = require('stream').Stream; |
| var rr = []; |
| var ww = []; |
| var cnt = 100; |
| var chunks = 1000; |
| var chunkSize = 250; |
| var data = new Buffer(chunkSize); |
| var wclosed = 0; |
| var rclosed = 0; |
| |
| function FakeStream() { |
| Stream.apply(this); |
| this.wait = false; |
| this.writable = true; |
| this.readable = true; |
| } |
| |
| FakeStream.prototype = Object.create(Stream.prototype); |
| |
| FakeStream.prototype.write = function(chunk) { |
| console.error(this.ID, 'write', this.wait); |
| if (this.wait) { |
| process.nextTick(this.emit.bind(this, 'drain')); |
| } |
| this.wait = !this.wait; |
| return this.wait; |
| }; |
| |
| FakeStream.prototype.end = function() { |
| this.emit('end'); |
| process.nextTick(this.close.bind(this)); |
| }; |
| |
| // noop - closes happen automatically on end. |
| FakeStream.prototype.close = function() { |
| this.emit('close'); |
| }; |
| |
| |
| // expect all streams to close properly. |
| process.on('exit', function() { |
| assert.equal(cnt, wclosed, 'writable streams closed'); |
| assert.equal(cnt, rclosed, 'readable streams closed'); |
| }); |
| |
| for (var i = 0; i < chunkSize; i++) { |
| chunkSize[i] = i % 256; |
| } |
| |
| for (var i = 0; i < cnt; i++) { |
| var r = new FakeStream(); |
| r.on('close', function() { |
| console.error(this.ID, 'read close'); |
| rclosed++; |
| }); |
| rr.push(r); |
| |
| var w = new FakeStream(); |
| w.on('close', function() { |
| console.error(this.ID, 'write close'); |
| wclosed++; |
| }); |
| ww.push(w); |
| |
| r.ID = w.ID = i; |
| r.pipe(w); |
| } |
| |
| // now start passing through data |
| // simulate a relatively fast async stream. |
| rr.forEach(function(r) { |
| var cnt = chunks; |
| var paused = false; |
| |
| r.on('pause', function() { |
| paused = true; |
| }); |
| |
| r.on('resume', function() { |
| paused = false; |
| step(); |
| }); |
| |
| function step() { |
| r.emit('data', data); |
| if (--cnt === 0) { |
| r.end(); |
| return; |
| } |
| if (paused) return; |
| process.nextTick(step); |
| } |
| |
| process.nextTick(step); |
| }); |