1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
'use strict';
require('../common');
var assert = require('assert');
var events = require('events');
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.equal(1, e.listeners('foo').length);
e.emit('foo');
assert.equal(2, e.listeners('foo').length);
assert.deepEqual(['callback1'], callbacks_called);
e.emit('foo');
assert.equal(0, e.listeners('foo').length);
assert.deepEqual(['callback1', 'callback2', 'callback3'], callbacks_called);
e.emit('foo');
assert.equal(0, e.listeners('foo').length);
assert.deepEqual(['callback1', 'callback2', 'callback3'], callbacks_called);
e.on('foo', callback1);
e.on('foo', callback2);
assert.equal(2, e.listeners('foo').length);
e.removeAllListeners('foo');
assert.equal(0, e.listeners('foo').length);
// Verify that removing callbacks while in emit allows emits to propagate to
// all listeners
callbacks_called = [];
e.on('foo', callback2);
e.on('foo', callback3);
assert.equal(2, e.listeners('foo').length);
e.emit('foo');
assert.deepEqual(['callback2', 'callback3'], callbacks_called);
assert.equal(0, e.listeners('foo').length);
|