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'; 23 24require('../common'); 25const assert = require('assert'); 26 27const EventEmitter = require('events').EventEmitter; 28 29const e = new EventEmitter(); 30let fl; // foo listeners 31 32fl = e.listeners('foo'); 33assert(Array.isArray(fl)); 34assert.strictEqual(fl.length, 0); 35assert(!(e._events instanceof Object)); 36assert.deepStrictEqual(Object.keys(e._events), []); 37 38e.on('foo', assert.fail); 39fl = e.listeners('foo'); 40assert.strictEqual(e._events.foo, assert.fail); 41assert(Array.isArray(fl)); 42assert.strictEqual(fl.length, 1); 43assert.strictEqual(fl[0], assert.fail); 44 45e.listeners('bar'); 46 47e.on('foo', assert.ok); 48fl = e.listeners('foo'); 49 50assert(Array.isArray(e._events.foo)); 51assert.strictEqual(e._events.foo.length, 2); 52assert.strictEqual(e._events.foo[0], assert.fail); 53assert.strictEqual(e._events.foo[1], assert.ok); 54 55assert(Array.isArray(fl)); 56assert.strictEqual(fl.length, 2); 57assert.strictEqual(fl[0], assert.fail); 58assert.strictEqual(fl[1], assert.ok); 59 60console.log('ok'); 61