/var/runtime/node_modules/@aws-sdk/node_modules/events/tests
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// 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. require('./common');var assert = require('assert');var events = require('../'); var callbacks_called = []; var e = new events.EventEmitter(); function callback1() { callbacks_called.push('callback1'); e.on('foo', callback2); e.on('foo', callback3); e.removeListener('foo', callback1);} function callback2() { callbacks_called.push('callback2'); e.removeListener('foo', callback2);} function callback3() { callbacks_called.push('callback3'); e.removeListener('foo', callback3);} e.on('foo', callback1);assert.strictEqual(e.listeners('foo').length, 1); e.emit('foo');assert.strictEqual(e.listeners('foo').length, 2);assert.ok(Array.isArray(callbacks_called));assert.strictEqual(callbacks_called.length, 1);assert.strictEqual(callbacks_called[0], 'callback1'); e.emit('foo');assert.strictEqual(e.listeners('foo').length, 0);assert.ok(Array.isArray(callbacks_called));assert.strictEqual(callbacks_called.length, 3);assert.strictEqual(callbacks_called[0], 'callback1');assert.strictEqual(callbacks_called[1], 'callback2');assert.strictEqual(callbacks_called[2], 'callback3'); e.emit('foo');assert.strictEqual(e.listeners('foo').length, 0);assert.ok(Array.isArray(callbacks_called));assert.strictEqual(callbacks_called.length, 3);assert.strictEqual(callbacks_called[0], 'callback1');assert.strictEqual(callbacks_called[1], 'callback2');assert.strictEqual(callbacks_called[2], 'callback3'); e.on('foo', callback1);e.on('foo', callback2);assert.strictEqual(e.listeners('foo').length, 2);e.removeAllListeners('foo');assert.strictEqual(e.listeners('foo').length, 0); // Verify that removing callbacks while in emit allows emits to propagate to// all listenerscallbacks_called = []; e.on('foo', callback2);e.on('foo', callback3);assert.strictEqual(2, e.listeners('foo').length);e.emit('foo');assert.ok(Array.isArray(callbacks_called));assert.strictEqual(callbacks_called.length, 2);assert.strictEqual(callbacks_called[0], 'callback2');assert.strictEqual(callbacks_called[1], 'callback3');assert.strictEqual(0, e.listeners('foo').length);