denoland-deno/cli/tests/node_compat/test/parallel/test-event-emitter-num-args.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 "node/_tools/setup.ts". Do not modify this file manually

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//
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// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
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'use strict';
require('../common');
const assert = require('assert');
const events = require('events');

const e = new events.EventEmitter();
const num_args_emitted = [];

e.on('numArgs', function() {
  const numArgs = arguments.length;
  num_args_emitted.push(numArgs);
});

e.on('foo', function() {
  num_args_emitted.push(arguments.length);
});

e.on('foo', function() {
  num_args_emitted.push(arguments.length);
});

e.emit('numArgs');
e.emit('numArgs', null);
e.emit('numArgs', null, null);
e.emit('numArgs', null, null, null);
e.emit('numArgs', null, null, null, null);
e.emit('numArgs', null, null, null, null, null);

e.emit('foo', null, null, null, null);

process.on('exit', function() {
  assert.deepStrictEqual(num_args_emitted, [0, 1, 2, 3, 4, 5, 4, 4]);
});