[apps/tidep0084.git] / example / iot-gateway / node_modules / events / tests / listeners-side-effects.js
2 // Copyright Joyent, Inc. and other Node contributors.
3 //
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5 // copy of this software and associated documentation files (the
6 // "Software"), to deal in the Software without restriction, including
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8 // distribute, sublicense, and/or sell copies of the Software, and to permit
9 // persons to whom the Software is furnished to do so, subject to the
10 // following conditions:
11 //
12 // The above copyright notice and this permission notice shall be included
13 // in all copies or substantial portions of the Software.
14 //
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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21 // USE OR OTHER DEALINGS IN THE SOFTWARE.
23 var assert = require('assert');
24 var EventEmitter = require('../').EventEmitter;
26 var e = new EventEmitter;
27 var fl; // foo listeners
29 fl = e.listeners('foo');
30 assert(Array.isArray(fl));
31 assert(fl.length === 0);
32 assert.deepEqual(e._events, {});
34 e.on('foo', assert.fail);
35 fl = e.listeners('foo');
36 assert(e._events.foo === assert.fail);
37 assert(Array.isArray(fl));
38 assert(fl.length === 1);
39 assert(fl[0] === assert.fail);
41 e.listeners('bar');
42 assert(!e._events.hasOwnProperty('bar'));
44 e.on('foo', assert.ok);
45 fl = e.listeners('foo');
47 assert(Array.isArray(e._events.foo));
48 assert(e._events.foo.length === 2);
49 assert(e._events.foo[0] === assert.fail);
50 assert(e._events.foo[1] === assert.ok);
52 assert(Array.isArray(fl));
53 assert(fl.length === 2);
54 assert(fl[0] === assert.fail);
55 assert(fl[1] === assert.ok);