denoland-deno/tests/node_compat/test/parallel/test-event-emitter-symbols.js

// 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';

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

const ee = new EventEmitter();
const foo = Symbol('foo');
const listener = common.mustCall();

ee.on(foo, listener);
assert.deepStrictEqual(ee.listeners(foo), [listener]);

ee.emit(foo);

ee.removeAllListeners();
assert.deepStrictEqual(ee.listeners(foo), []);

ee.on(foo, listener);
assert.deepStrictEqual(ee.listeners(foo), [listener]);

ee.removeListener(foo, listener);
assert.deepStrictEqual(ee.listeners(foo), []);