1// Copyright Joyent, Inc. and other Node contributors. 2// 3// Permission is hereby granted, free of charge, to any person obtaining a 4// copy of this software and associated documentation files (the 5// "Software"), to deal in the Software without restriction, including 6// without limitation the rights to use, copy, modify, merge, publish, 7// distribute, sublicense, and/or sell copies of the Software, and to permit 8// persons to whom the Software is furnished to do so, subject to the 9// following conditions: 10// 11// The above copyright notice and this permission notice shall be included 12// in all copies or substantial portions of the Software. 13// 14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 20// USE OR OTHER DEALINGS IN THE SOFTWARE. 21 22'use strict'; 23require('../common'); 24const assert = require('assert'); 25 26const stream = require('stream'); 27 28class TestWriter extends stream.Writable { 29 _write(buffer, encoding, callback) { 30 console.log('write called'); 31 // Super slow write stream (callback never called) 32 } 33} 34 35const dest = new TestWriter(); 36 37class TestReader extends stream.Readable { 38 constructor() { 39 super(); 40 this.reads = 0; 41 } 42 43 _read(size) { 44 this.reads += 1; 45 this.push(Buffer.alloc(size)); 46 } 47} 48 49const src1 = new TestReader(); 50const src2 = new TestReader(); 51 52src1.pipe(dest); 53 54src1.once('readable', () => { 55 process.nextTick(() => { 56 57 src2.pipe(dest); 58 59 src2.once('readable', () => { 60 process.nextTick(() => { 61 62 src1.unpipe(dest); 63 }); 64 }); 65 }); 66}); 67 68 69process.on('exit', () => { 70 assert.strictEqual(src1.reads, 2); 71 assert.strictEqual(src2.reads, 2); 72}); 73