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 EventEmitter = require('events').EventEmitter; 26 27Object.setPrototypeOf(MyEE.prototype, EventEmitter.prototype); 28Object.setPrototypeOf(MyEE, EventEmitter); 29 30function MyEE(cb) { 31 this.once(1, cb); 32 this.emit(1); 33 this.removeAllListeners(); 34 EventEmitter.call(this); 35} 36 37const myee = new MyEE(common.mustCall()); 38 39Object.setPrototypeOf(ErrorEE.prototype, EventEmitter.prototype); 40Object.setPrototypeOf(ErrorEE, EventEmitter); 41function ErrorEE() { 42 this.emit('error', new Error('blerg')); 43} 44 45assert.throws(function() { 46 new ErrorEE(); 47}, /blerg/); 48 49process.on('exit', function() { 50 assert(!(myee._events instanceof Object)); 51 assert.deepStrictEqual(Object.keys(myee._events), []); 52 console.log('ok'); 53}); 54 55 56function MyEE2() { 57 EventEmitter.call(this); 58} 59 60MyEE2.prototype = new EventEmitter(); 61 62const ee1 = new MyEE2(); 63const ee2 = new MyEE2(); 64 65ee1.on('x', () => {}); 66 67assert.strictEqual(ee2.listenerCount('x'), 0); 68