tests/node_compat/test/parallel/test-event-emitter-listener-count.js


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// deno-fmt-ignore-file
// deno-lint-ignore-file

// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 18.12.1
// This file is automatically generated by `tests/node_compat/runner/setup.ts`. Do not modify this file manually.

'use strict';

require('../common');
const assert = require('assert');
const EventEmitter = require('events');

const emitter = new EventEmitter();
emitter.on('foo', () => {});
emitter.on('foo', () => {});
emitter.on('baz', () => {});
// Allow any type
emitter.on(123, () => {});

assert.strictEqual(EventEmitter.listenerCount(emitter, 'foo'), 2);
assert.strictEqual(emitter.listenerCount('foo'), 2);
assert.strictEqual(emitter.listenerCount('bar'), 0);
assert.strictEqual(emitter.listenerCount('baz'), 1);
assert.strictEqual(emitter.listenerCount(123), 1);