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'); 25const events = require('events'); 26 27const e = new events.EventEmitter(); 28const num_args_emitted = []; 29 30e.on('numArgs', function() { 31 const numArgs = arguments.length; 32 num_args_emitted.push(numArgs); 33}); 34 35e.on('foo', function() { 36 num_args_emitted.push(arguments.length); 37}); 38 39e.on('foo', function() { 40 num_args_emitted.push(arguments.length); 41}); 42 43e.emit('numArgs'); 44e.emit('numArgs', null); 45e.emit('numArgs', null, null); 46e.emit('numArgs', null, null, null); 47e.emit('numArgs', null, null, null, null); 48e.emit('numArgs', null, null, null, null, null); 49 50e.emit('foo', null, null, null, null); 51 52process.on('exit', function() { 53 assert.deepStrictEqual(num_args_emitted, [0, 1, 2, 3, 4, 5, 4, 4]); 54}); 55