node/test/parallel/test-event-emitter-check-listener-leaks.js
Rich Trott e2e2bc83c0
test: use Object.hasOwn() where applicable
Replace Object.prototpye.hasOwnProperty() with Object.hasOwn() where
applicable.

PR-URL: https://github.com/nodejs/node/pull/41664
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tierney Cyren <hello@bnb.im>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
2022-01-25 07:03:17 +00:00

104 lines
3.5 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 events = require('events');
// default
{
const e = new events.EventEmitter();
for (let i = 0; i < 10; i++) {
e.on('default', common.mustNotCall());
}
assert.ok(!Object.hasOwn(e._events.default, 'warned'));
e.on('default', common.mustNotCall());
assert.ok(e._events.default.warned);
// symbol
const symbol = Symbol('symbol');
e.setMaxListeners(1);
e.on(symbol, common.mustNotCall());
assert.ok(!Object.hasOwn(e._events[symbol], 'warned'));
e.on(symbol, common.mustNotCall());
assert.ok(Object.hasOwn(e._events[symbol], 'warned'));
// specific
e.setMaxListeners(5);
for (let i = 0; i < 5; i++) {
e.on('specific', common.mustNotCall());
}
assert.ok(!Object.hasOwn(e._events.specific, 'warned'));
e.on('specific', common.mustNotCall());
assert.ok(e._events.specific.warned);
// only one
e.setMaxListeners(1);
e.on('only one', common.mustNotCall());
assert.ok(!Object.hasOwn(e._events['only one'], 'warned'));
e.on('only one', common.mustNotCall());
assert.ok(Object.hasOwn(e._events['only one'], 'warned'));
// unlimited
e.setMaxListeners(0);
for (let i = 0; i < 1000; i++) {
e.on('unlimited', common.mustNotCall());
}
assert.ok(!Object.hasOwn(e._events.unlimited, 'warned'));
}
// process-wide
{
events.EventEmitter.defaultMaxListeners = 42;
const e = new events.EventEmitter();
for (let i = 0; i < 42; ++i) {
e.on('fortytwo', common.mustNotCall());
}
assert.ok(!Object.hasOwn(e._events.fortytwo, 'warned'));
e.on('fortytwo', common.mustNotCall());
assert.ok(Object.hasOwn(e._events.fortytwo, 'warned'));
delete e._events.fortytwo.warned;
events.EventEmitter.defaultMaxListeners = 44;
e.on('fortytwo', common.mustNotCall());
assert.ok(!Object.hasOwn(e._events.fortytwo, 'warned'));
e.on('fortytwo', common.mustNotCall());
assert.ok(Object.hasOwn(e._events.fortytwo, 'warned'));
}
// But _maxListeners still has precedence over defaultMaxListeners
{
events.EventEmitter.defaultMaxListeners = 42;
const e = new events.EventEmitter();
e.setMaxListeners(1);
e.on('uno', common.mustNotCall());
assert.ok(!Object.hasOwn(e._events.uno, 'warned'));
e.on('uno', common.mustNotCall());
assert.ok(Object.hasOwn(e._events.uno, 'warned'));
// chainable
assert.strictEqual(e, e.setMaxListeners(1));
}