mirror of
https://github.com/nodejs/node.git
synced 2024-11-21 10:59:27 +00:00
cea853cb02
PR-URL: https://github.com/nodejs/node/pull/32769 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de> Reviewed-By: Richard Lau <riclau@uk.ibm.com>
87 lines
2.8 KiB
JavaScript
87 lines
2.8 KiB
JavaScript
// 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.
|
|
|
|
'use strict';
|
|
const common = require('../common');
|
|
const assert = require('assert');
|
|
const EventEmitter = require('events');
|
|
|
|
{
|
|
const ee = new EventEmitter();
|
|
const events_new_listener_emitted = [];
|
|
const listeners_new_listener_emitted = [];
|
|
|
|
// Sanity check
|
|
assert.strictEqual(ee.addListener, ee.on);
|
|
|
|
ee.on('newListener', function(event, listener) {
|
|
// Don't track newListener listeners.
|
|
if (event === 'newListener')
|
|
return;
|
|
|
|
events_new_listener_emitted.push(event);
|
|
listeners_new_listener_emitted.push(listener);
|
|
});
|
|
|
|
const hello = common.mustCall(function(a, b) {
|
|
assert.strictEqual(a, 'a');
|
|
assert.strictEqual(b, 'b');
|
|
});
|
|
|
|
ee.once('newListener', function(name, listener) {
|
|
assert.strictEqual(name, 'hello');
|
|
assert.strictEqual(listener, hello);
|
|
assert.deepStrictEqual(this.listeners('hello'), []);
|
|
});
|
|
|
|
ee.on('hello', hello);
|
|
ee.once('foo', assert.fail);
|
|
assert.deepStrictEqual(['hello', 'foo'], events_new_listener_emitted);
|
|
assert.deepStrictEqual([hello, assert.fail], listeners_new_listener_emitted);
|
|
|
|
ee.emit('hello', 'a', 'b');
|
|
}
|
|
|
|
// Just make sure that this doesn't throw:
|
|
{
|
|
const f = new EventEmitter();
|
|
|
|
f.setMaxListeners(0);
|
|
}
|
|
|
|
{
|
|
const listen1 = () => {};
|
|
const listen2 = () => {};
|
|
const ee = new EventEmitter();
|
|
|
|
ee.once('newListener', function() {
|
|
assert.deepStrictEqual(ee.listeners('hello'), []);
|
|
ee.once('newListener', function() {
|
|
assert.deepStrictEqual(ee.listeners('hello'), []);
|
|
});
|
|
ee.on('hello', listen2);
|
|
});
|
|
ee.on('hello', listen1);
|
|
// The order of listeners on an event is not always the order in which the
|
|
// listeners were added.
|
|
assert.deepStrictEqual(ee.listeners('hello'), [listen2, listen1]);
|
|
}
|