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 events = require('events'); 26const { inspect } = require('util'); 27const e = new events.EventEmitter(); 28 29e.on('maxListeners', common.mustCall()); 30 31// Should not corrupt the 'maxListeners' queue. 32e.setMaxListeners(42); 33 34const throwsObjs = [NaN, -1, 'and even this']; 35 36for (const obj of throwsObjs) { 37 assert.throws( 38 () => e.setMaxListeners(obj), 39 { 40 code: 'ERR_OUT_OF_RANGE', 41 name: 'RangeError', 42 message: 'The value of "n" is out of range. ' + 43 `It must be a non-negative number. Received ${inspect(obj)}` 44 } 45 ); 46 47 assert.throws( 48 () => events.defaultMaxListeners = obj, 49 { 50 code: 'ERR_OUT_OF_RANGE', 51 name: 'RangeError', 52 message: 'The value of "defaultMaxListeners" is out of range. ' + 53 `It must be a non-negative number. Received ${inspect(obj)}` 54 } 55 ); 56} 57 58e.emit('maxListeners'); 59