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'use strict'; 22 23require('../common'); 24const assert = require('assert'); 25const Duplex = require('stream').Duplex; 26 27const stream = new Duplex({ objectMode: true }); 28 29assert(Duplex() instanceof Duplex); 30assert(stream._readableState.objectMode); 31assert(stream._writableState.objectMode); 32assert(stream.allowHalfOpen); 33assert.strictEqual(stream.listenerCount('end'), 0); 34 35let written; 36let read; 37 38stream._write = (obj, _, cb) => { 39 written = obj; 40 cb(); 41}; 42 43stream._read = () => {}; 44 45stream.on('data', (obj) => { 46 read = obj; 47}); 48 49stream.push({ val: 1 }); 50stream.end({ val: 2 }); 51 52process.on('exit', () => { 53 assert.strictEqual(read.val, 1); 54 assert.strictEqual(written.val, 2); 55}); 56