Server : Apache/2.4.41 (Ubuntu) System : Linux absol.cf 5.4.0-198-generic #218-Ubuntu SMP Fri Sep 27 20:18:53 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /usr/local/lib/node_modules/browserify/node_modules/events/tests/

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'use strict';

var common = require('./common');
var EventEmitter = require('../');
var assert = require('assert');

var myEE = new EventEmitter();
var m = 0;
// This one comes last.
myEE.on('foo', common.mustCall(function () {
  assert.strictEqual(m, 2);
}));

// This one comes second.
myEE.prependListener('foo', common.mustCall(function () {
  assert.strictEqual(m++, 1);
}));

// This one comes first.
myEE.prependOnceListener('foo',
                         common.mustCall(function () {
                           assert.strictEqual(m++, 0);
                         }));

myEE.emit('foo');

// Verify that the listener must be a function
assert.throws(function () {
  var ee = new EventEmitter();
  ee.prependOnceListener('foo', null);
}, 'TypeError: The "listener" argument must be of type Function. Received type object');