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'; 23const common = require('../common'); 24const assert = require('assert'); 25const Readable = require('_stream_readable'); 26const Writable = require('_stream_writable'); 27 28class TestReadable extends Readable { 29 constructor(opt) { 30 super(opt); 31 this._ended = false; 32 } 33 34 _read() { 35 if (this._ended) 36 this.emit('error', new Error('_read called twice')); 37 this._ended = true; 38 this.push(null); 39 } 40} 41 42class TestWritable extends Writable { 43 constructor(opt) { 44 super(opt); 45 this._written = []; 46 } 47 48 _write(chunk, encoding, cb) { 49 this._written.push(chunk); 50 cb(); 51 } 52} 53 54// This one should not emit 'end' until we read() from it later. 55const ender = new TestReadable(); 56 57// What happens when you pipe() a Readable that's already ended? 58const piper = new TestReadable(); 59// pushes EOF null, and length=0, so this will trigger 'end' 60piper.read(); 61 62setTimeout(common.mustCall(function() { 63 ender.on('end', common.mustCall()); 64 const c = ender.read(); 65 assert.strictEqual(c, null); 66 67 const w = new TestWritable(); 68 w.on('finish', common.mustCall()); 69 piper.pipe(w); 70}), 1); 71