deno.land / std@0.166.0 / node / _tools / test / parallel / test-event-emitter-listeners-side-effects.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';
require('../common');const assert = require('assert');
const EventEmitter = require('events').EventEmitter;
const e = new EventEmitter();let fl; // foo listeners
fl = e.listeners('foo');assert(Array.isArray(fl));assert.strictEqual(fl.length, 0);assert(!(e._events instanceof Object));assert.deepStrictEqual(Object.keys(e._events), []);
e.on('foo', assert.fail);fl = e.listeners('foo');assert.strictEqual(e._events.foo, assert.fail);assert(Array.isArray(fl));assert.strictEqual(fl.length, 1);assert.strictEqual(fl[0], assert.fail);
e.listeners('bar');
e.on('foo', assert.ok);fl = e.listeners('foo');
assert(Array.isArray(e._events.foo));assert.strictEqual(e._events.foo.length, 2);assert.strictEqual(e._events.foo[0], assert.fail);assert.strictEqual(e._events.foo[1], assert.ok);
assert(Array.isArray(fl));assert.strictEqual(fl.length, 2);assert.strictEqual(fl[0], assert.fail);assert.strictEqual(fl[1], assert.ok);
console.log('ok');
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