1 // Copyright Joyent, Inc. and other Node contributors.
2 //
3 // Permission is hereby granted, free of charge, to any person obtaining a
4 // copy of this software and associated documentation files (the
5 // "Software"), to deal in the Software without restriction, including
6 // without limitation the rights to use, copy, modify, merge, publish,
7 // distribute, sublicense, and/or sell copies of the Software, and to permit
8 // persons to whom the Software is furnished to do so, subject to the
9 // following conditions:
10 //
11 // The above copyright notice and this permission notice shall be included
12 // in all copies or substantial portions of the Software.
13 //
14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17 // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18 // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 // USE OR OTHER DEALINGS IN THE SOFTWARE.
22 var common = require('./common');
23 var assert = require('assert');
24 var events = require('../');
26 var count = 0;
28 function listener1() {
29 console.log('listener1');
30 count++;
31 }
33 function listener2() {
34 console.log('listener2');
35 count++;
36 }
38 function listener3() {
39 console.log('listener3');
40 count++;
41 }
43 function remove1() {
44 assert(0);
45 }
47 function remove2() {
48 assert(0);
49 }
51 var e1 = new events.EventEmitter();
52 e1.on('hello', listener1);
53 e1.on('removeListener', common.mustCall(function(name, cb) {
54 assert.equal(name, 'hello');
55 assert.equal(cb, listener1);
56 }));
57 e1.removeListener('hello', listener1);
58 assert.deepEqual([], e1.listeners('hello'));
60 var e2 = new events.EventEmitter();
61 e2.on('hello', listener1);
62 e2.on('removeListener', assert.fail);
63 e2.removeListener('hello', listener2);
64 assert.deepEqual([listener1], e2.listeners('hello'));
66 var e3 = new events.EventEmitter();
67 e3.on('hello', listener1);
68 e3.on('hello', listener2);
69 e3.on('removeListener', common.mustCall(function(name, cb) {
70 assert.equal(name, 'hello');
71 assert.equal(cb, listener1);
72 }));
73 e3.removeListener('hello', listener1);
74 assert.deepEqual([listener2], e3.listeners('hello'));
76 var e4 = new events.EventEmitter();
77 e4.on('removeListener', common.mustCall(function(name, cb) {
78 if (cb !== remove1) return;
79 this.removeListener('quux', remove2);
80 this.emit('quux');
81 }, 2));
82 e4.on('quux', remove1);
83 e4.on('quux', remove2);
84 e4.removeListener('quux', remove1);