1 // Copyright Joyent, Inc. and other Node contributors.
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:
11 // The above copyright notice and this permission notice shall be included
12 // in all copies or substantial portions of the Software.
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.
23 var assert = require('assert');
24 var events = require('../');
25 var util = require('util');
27 function listener() {}
28 function listener2() {}
29 function listener3() {
32 function listener4() {
36 function TestStream() {}
37 util.inherits(TestStream, events.EventEmitter);
40 var ee = new events.EventEmitter();
41 ee.on('foo', listener);
42 var fooListeners = ee.listeners('foo');
44 var listeners = ee.listeners('foo');
45 assert.ok(Array.isArray(listeners));
46 assert.strictEqual(listeners.length, 1);
47 assert.strictEqual(listeners[0], listener);
49 ee.removeAllListeners('foo');
50 listeners = ee.listeners('foo');
51 assert.ok(Array.isArray(listeners));
52 assert.strictEqual(listeners.length, 0);
54 assert.ok(Array.isArray(fooListeners));
55 assert.strictEqual(fooListeners.length, 1);
56 assert.strictEqual(fooListeners[0], listener);
60 var ee = new events.EventEmitter();
61 ee.on('foo', listener);
63 var eeListenersCopy = ee.listeners('foo');
64 assert.ok(Array.isArray(eeListenersCopy));
65 assert.strictEqual(eeListenersCopy.length, 1);
66 assert.strictEqual(eeListenersCopy[0], listener);
68 var listeners = ee.listeners('foo');
69 assert.ok(Array.isArray(listeners));
70 assert.strictEqual(listeners.length, 1);
71 assert.strictEqual(listeners[0], listener);
73 eeListenersCopy.push(listener2);
74 listeners = ee.listeners('foo');
76 assert.ok(Array.isArray(listeners));
77 assert.strictEqual(listeners.length, 1);
78 assert.strictEqual(listeners[0], listener);
80 assert.strictEqual(eeListenersCopy.length, 2);
81 assert.strictEqual(eeListenersCopy[0], listener);
82 assert.strictEqual(eeListenersCopy[1], listener2);
86 var ee = new events.EventEmitter();
87 ee.on('foo', listener);
88 var eeListenersCopy = ee.listeners('foo');
89 ee.on('foo', listener2);
91 var listeners = ee.listeners('foo');
92 assert.ok(Array.isArray(listeners));
93 assert.strictEqual(listeners.length, 2);
94 assert.strictEqual(listeners[0], listener);
95 assert.strictEqual(listeners[1], listener2);
97 assert.ok(Array.isArray(eeListenersCopy));
98 assert.strictEqual(eeListenersCopy.length, 1);
99 assert.strictEqual(eeListenersCopy[0], listener);
103 var ee = new events.EventEmitter();
104 ee.once('foo', listener);
105 var listeners = ee.listeners('foo');
106 assert.ok(Array.isArray(listeners));
107 assert.strictEqual(listeners.length, 1);
108 assert.strictEqual(listeners[0], listener);
112 var ee = new events.EventEmitter();
113 ee.on('foo', listener);
114 ee.once('foo', listener2);
116 var listeners = ee.listeners('foo');
117 assert.ok(Array.isArray(listeners));
118 assert.strictEqual(listeners.length, 2);
119 assert.strictEqual(listeners[0], listener);
120 assert.strictEqual(listeners[1], listener2);
124 var ee = new events.EventEmitter();
125 ee._events = undefined;
126 var listeners = ee.listeners('foo');
127 assert.ok(Array.isArray(listeners));
128 assert.strictEqual(listeners.length, 0);
132 var s = new TestStream();
133 var listeners = s.listeners('foo');
134 assert.ok(Array.isArray(listeners));
135 assert.strictEqual(listeners.length, 0);
140 var ee = new events.EventEmitter();
141 ee.on('foo', listener);
142 var wrappedListener = ee.rawListeners('foo');
143 assert.strictEqual(wrappedListener.length, 1);
144 assert.strictEqual(wrappedListener[0], listener);
145 assert.notStrictEqual(wrappedListener, ee.rawListeners('foo'));
146 ee.once('foo', listener);
147 var wrappedListeners = ee.rawListeners('foo');
148 assert.strictEqual(wrappedListeners.length, 2);
149 assert.strictEqual(wrappedListeners[0], listener);
150 assert.notStrictEqual(wrappedListeners[1], listener);
151 assert.strictEqual(wrappedListeners[1].listener, listener);
152 assert.notStrictEqual(wrappedListeners, ee.rawListeners('foo'));
154 assert.strictEqual(wrappedListeners.length, 2);
155 assert.strictEqual(wrappedListeners[1].listener, listener);
159 var ee = new events.EventEmitter();
160 ee.once('foo', listener3);
161 ee.on('foo', listener4);
162 var rawListeners = ee.rawListeners('foo');
163 assert.strictEqual(rawListeners.length, 2);
164 assert.strictEqual(rawListeners[0](), 0);
165 var rawListener = ee.rawListeners('foo');
166 assert.strictEqual(rawListener.length, 1);
167 assert.strictEqual(rawListener[0](), 1);