// 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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// 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,
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import { EventEmitter } from '../../../packages/playwright-core/lib/client/eventEmitter';
import { test, expect } from '@playwright/test';

test('EventEmitter prototype test', () => {
  const ee = new EventEmitter();
  // eslint-disable-next-line no-proto
  expect((ee as any).__proto__.constructor.name).toEqual('EventEmitter');
  expect(ee.on).toEqual(ee.addListener);  // Same method.
  expect(ee.off).toEqual(ee.removeListener);  // Same method.

  Object.getOwnPropertyNames(ee).forEach(name => {
    if (name === 'constructor' || name === 'on' || name === 'off')
      return;
    if (typeof ee[name] !== 'function')
      return;
    expect(ee[name].name).toEqual(name);
  });
});