| // 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. |
| |
| var common = require('./common'); |
| var assert = require('assert'); |
| var EventEmitter = require('../'); |
| |
| var listener1 = function listener1() {}; |
| var listener2 = function listener2() {}; |
| |
| { |
| var ee = new EventEmitter(); |
| ee.on('hello', listener1); |
| ee.on('removeListener', common.mustCall(function(name, cb) { |
| assert.strictEqual(name, 'hello'); |
| assert.strictEqual(cb, listener1); |
| })); |
| ee.removeListener('hello', listener1); |
| var listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 0); |
| } |
| |
| { |
| var ee = new EventEmitter(); |
| ee.on('hello', listener1); |
| ee.on('removeListener', common.mustNotCall()); |
| ee.removeListener('hello', listener2); |
| |
| var listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 1); |
| assert.strictEqual(listeners[0], listener1); |
| } |
| |
| { |
| var ee = new EventEmitter(); |
| ee.on('hello', listener1); |
| ee.on('hello', listener2); |
| |
| var listeners; |
| ee.once('removeListener', common.mustCall(function(name, cb) { |
| assert.strictEqual(name, 'hello'); |
| assert.strictEqual(cb, listener1); |
| listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 1); |
| assert.strictEqual(listeners[0], listener2); |
| })); |
| ee.removeListener('hello', listener1); |
| listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 1); |
| assert.strictEqual(listeners[0], listener2); |
| ee.once('removeListener', common.mustCall(function(name, cb) { |
| assert.strictEqual(name, 'hello'); |
| assert.strictEqual(cb, listener2); |
| listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 0); |
| })); |
| ee.removeListener('hello', listener2); |
| listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 0); |
| } |
| |
| { |
| var 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); |
| } |
| |
| { |
| var ee = new EventEmitter(); |
| ee.on('hello', listener1); |
| ee.on('hello', listener2); |
| |
| var listeners; |
| ee.once('removeListener', common.mustCall(function(name, cb) { |
| assert.strictEqual(name, 'hello'); |
| assert.strictEqual(cb, listener1); |
| listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 1); |
| assert.strictEqual(listeners[0], listener2); |
| ee.once('removeListener', common.mustCall(function(name, cb) { |
| assert.strictEqual(name, 'hello'); |
| assert.strictEqual(cb, listener2); |
| listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 0); |
| })); |
| ee.removeListener('hello', listener2); |
| listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 0); |
| })); |
| ee.removeListener('hello', listener1); |
| listeners = ee.listeners('hello'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 0); |
| } |
| |
| { |
| var ee = new EventEmitter(); |
| var listener3 = common.mustCall(function() { |
| ee.removeListener('hello', listener4); |
| }, 2); |
| var 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 interal listener array at time of emit |
| // was [listener3,listener4] |
| |
| // Interal listener array [listener3] |
| ee.emit('hello'); |
| } |
| |
| { |
| var ee = new EventEmitter(); |
| |
| ee.once('hello', listener1); |
| ee.on('removeListener', common.mustCall(function(eventName, listener) { |
| assert.strictEqual(eventName, 'hello'); |
| assert.strictEqual(listener, listener1); |
| })); |
| ee.emit('hello'); |
| } |
| |
| { |
| var ee = new EventEmitter(); |
| |
| assert.strictEqual(ee, ee.removeListener('foo', function() {})); |
| } |
| |
| // Verify that the removed listener must be a function |
| assert.throws(function() { |
| var ee = new EventEmitter(); |
| |
| ee.removeListener('foo', null); |
| }, /^TypeError: The "listener" argument must be of type Function\. Received type object$/); |
| |
| { |
| var ee = new EventEmitter(); |
| var listener = function() {}; |
| ee._events = undefined; |
| var e = ee.removeListener('foo', listener); |
| assert.strictEqual(e, ee); |
| } |
| |
| { |
| var ee = new EventEmitter(); |
| |
| ee.on('foo', listener1); |
| ee.on('foo', listener2); |
| var listeners = ee.listeners('foo'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 2); |
| assert.strictEqual(listeners[0], listener1); |
| assert.strictEqual(listeners[1], listener2); |
| |
| ee.removeListener('foo', listener1); |
| assert.strictEqual(ee._events.foo, listener2); |
| |
| ee.on('foo', listener1); |
| listeners = ee.listeners('foo'); |
| assert.ok(Array.isArray(listeners)); |
| assert.strictEqual(listeners.length, 2); |
| assert.strictEqual(listeners[0], listener2); |
| assert.strictEqual(listeners[1], listener1); |
| |
| ee.removeListener('foo', listener1); |
| assert.strictEqual(ee._events.foo, listener2); |
| } |