deno.land / std@0.166.0 / node / _tools / test / parallel / test-event-emitter-check-listener-leaks.js
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
// Copyright Joyent, Inc. and other Node contributors.//// Permission is hereby granted, free of charge, to any person obtaining a// copy of this software and associated documentation files (the// "Software"), to deal in the Software without restriction, including// without limitation the rights to use, copy, modify, merge, publish,// distribute, sublicense, and/or sell copies of the Software, and to permit// persons to whom the Software is furnished to do so, subject to the// following conditions://// The above copyright notice and this permission notice shall be included// in all copies or substantial portions of the Software.//// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const common = require('../common');const assert = require('assert');const events = require('events');
// default{ const e = new events.EventEmitter();
for (let i = 0; i < 10; i++) { e.on('default', common.mustNotCall()); } assert.ok(!Object.hasOwn(e._events.default, 'warned')); e.on('default', common.mustNotCall()); assert.ok(e._events.default.warned);
// symbol const symbol = Symbol('symbol'); e.setMaxListeners(1); e.on(symbol, common.mustNotCall()); assert.ok(!Object.hasOwn(e._events[symbol], 'warned')); e.on(symbol, common.mustNotCall()); assert.ok(Object.hasOwn(e._events[symbol], 'warned'));
// specific e.setMaxListeners(5); for (let i = 0; i < 5; i++) { e.on('specific', common.mustNotCall()); } assert.ok(!Object.hasOwn(e._events.specific, 'warned')); e.on('specific', common.mustNotCall()); assert.ok(e._events.specific.warned);
// only one e.setMaxListeners(1); e.on('only one', common.mustNotCall()); assert.ok(!Object.hasOwn(e._events['only one'], 'warned')); e.on('only one', common.mustNotCall()); assert.ok(Object.hasOwn(e._events['only one'], 'warned'));
// unlimited e.setMaxListeners(0); for (let i = 0; i < 1000; i++) { e.on('unlimited', common.mustNotCall()); } assert.ok(!Object.hasOwn(e._events.unlimited, 'warned'));}
// process-wide{ events.EventEmitter.defaultMaxListeners = 42; const e = new events.EventEmitter();
for (let i = 0; i < 42; ++i) { e.on('fortytwo', common.mustNotCall()); } assert.ok(!Object.hasOwn(e._events.fortytwo, 'warned')); e.on('fortytwo', common.mustNotCall()); assert.ok(Object.hasOwn(e._events.fortytwo, 'warned')); delete e._events.fortytwo.warned;
events.EventEmitter.defaultMaxListeners = 44; e.on('fortytwo', common.mustNotCall()); assert.ok(!Object.hasOwn(e._events.fortytwo, 'warned')); e.on('fortytwo', common.mustNotCall()); assert.ok(Object.hasOwn(e._events.fortytwo, 'warned'));}
// But _maxListeners still has precedence over defaultMaxListeners{ events.EventEmitter.defaultMaxListeners = 42; const e = new events.EventEmitter(); e.setMaxListeners(1); e.on('uno', common.mustNotCall()); assert.ok(!Object.hasOwn(e._events.uno, 'warned')); e.on('uno', common.mustNotCall()); assert.ok(Object.hasOwn(e._events.uno, 'warned'));
// chainable assert.strictEqual(e, e.setMaxListeners(1));}
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