deno.land / std@0.166.0 / node / _tools / test / parallel / test-event-emitter-remove-listeners.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 EventEmitter = require('events');
function listener1() {}
function listener2() {}
{ const ee = new EventEmitter(); ee.on('hello', listener1); ee.on('removeListener', common.mustCall((name, cb) => { assert.strictEqual(name, 'hello'); assert.strictEqual(cb, listener1); })); ee.removeListener('hello', listener1); assert.deepStrictEqual([], ee.listeners('hello'));}
{ const ee = new EventEmitter(); ee.on('hello', listener1); ee.on('removeListener', common.mustNotCall()); ee.removeListener('hello', listener2); assert.deepStrictEqual([listener1], ee.listeners('hello'));}
{ const ee = new EventEmitter(); ee.on('hello', listener1); ee.on('hello', listener2); ee.once('removeListener', common.mustCall((name, cb) => { assert.strictEqual(name, 'hello'); assert.strictEqual(cb, listener1); assert.deepStrictEqual([listener2], ee.listeners('hello')); })); ee.removeListener('hello', listener1); assert.deepStrictEqual([listener2], ee.listeners('hello')); ee.once('removeListener', common.mustCall((name, cb) => { assert.strictEqual(name, 'hello'); assert.strictEqual(cb, listener2); assert.deepStrictEqual([], ee.listeners('hello')); })); ee.removeListener('hello', listener2); assert.deepStrictEqual([], ee.listeners('hello'));}
{ const ee = new EventEmitter();
function remove1() { assert.fail('remove1 should not have been called'); }
function remove2() { assert.fail('remove2 should not have been called'); }
ee.on('removeListener', common.mustCall(function(name, cb) { if (cb !== remove1) return; this.removeListener('quux', remove2); this.emit('quux'); }, 2)); ee.on('quux', remove1); ee.on('quux', remove2); ee.removeListener('quux', remove1);}
{ const ee = new EventEmitter(); ee.on('hello', listener1); ee.on('hello', listener2); ee.once('removeListener', common.mustCall((name, cb) => { assert.strictEqual(name, 'hello'); assert.strictEqual(cb, listener1); assert.deepStrictEqual([listener2], ee.listeners('hello')); ee.once('removeListener', common.mustCall((name, cb) => { assert.strictEqual(name, 'hello'); assert.strictEqual(cb, listener2); assert.deepStrictEqual([], ee.listeners('hello')); })); ee.removeListener('hello', listener2); assert.deepStrictEqual([], ee.listeners('hello')); })); ee.removeListener('hello', listener1); assert.deepStrictEqual([], ee.listeners('hello'));}
{ const ee = new EventEmitter(); const listener3 = common.mustCall(() => { ee.removeListener('hello', listener4); }, 2); const listener4 = common.mustCall();
ee.on('hello', listener3); ee.on('hello', listener4);
// listener4 will still be called although it is removed by listener 3. ee.emit('hello'); // This is so because the internal listener array at time of emit // was [listener3,listener4]
// Internal listener array [listener3] ee.emit('hello');}
{ const ee = new EventEmitter();
ee.once('hello', listener1); ee.on('removeListener', common.mustCall((eventName, listener) => { assert.strictEqual(eventName, 'hello'); assert.strictEqual(listener, listener1); })); ee.emit('hello');}
{ const ee = new EventEmitter();
assert.deepStrictEqual(ee, ee.removeListener('foo', () => {}));}
{ const ee = new EventEmitter(); const listener = () => {}; ee._events = undefined; const e = ee.removeListener('foo', listener); assert.strictEqual(e, ee);}
{ const ee = new EventEmitter();
ee.on('foo', listener1); ee.on('foo', listener2); assert.deepStrictEqual(ee.listeners('foo'), [listener1, listener2]);
ee.removeListener('foo', listener1); assert.strictEqual(ee._events.foo, listener2);
ee.on('foo', listener1); assert.deepStrictEqual(ee.listeners('foo'), [listener2, listener1]);
ee.removeListener('foo', listener1); assert.strictEqual(ee._events.foo, listener2);}
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