// Copyright Joyent, Inc. and other Node contributors.
// Modifications copyright (c) by Microsoft Corporation
//
// 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
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// 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,
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import { test, expect } from '@playwright/test';
import { EventEmitter } from '../../../packages/playwright-core/lib/client/eventEmitter';


test('should support special event names', () => {
  const ee = new EventEmitter();
  const handler = () => {};

  expect(ee.eventNames().length).toEqual(0);
  expect(ee._events.hasOwnProperty).toEqual(undefined);
  expect(ee._events.toString).toEqual(undefined);

  ee.on('__defineGetter__', handler);
  ee.on('toString', handler);
  ee.on('__proto__', handler);

  expect(ee.eventNames()[0]).toEqual('__defineGetter__');
  expect(ee.eventNames()[1]).toEqual('toString');

  expect(ee.listeners('__defineGetter__').length).toEqual(1);
  expect(ee.listeners('__defineGetter__')[0]).toEqual(handler);
  expect(ee.listeners('toString').length).toEqual(1);
  expect(ee.listeners('toString')[0]).toEqual(handler);
});