max-listeners.js

// Copyright Joyent, Inc. and other Node contributors.
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//
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var assert = require('assert');
var events = require('../');

var gotEvent = false;

var e = new events.EventEmitter();

e.on('maxListeners', function() {
  gotEvent = true;
});

// Should not corrupt the 'maxListeners' queue.
e.setMaxListeners(42);

assert.throws(function() {
  e.setMaxListeners(NaN);
});

assert.throws(function() {
  e.setMaxListeners(-1);
});

assert.throws(function() {
  e.setMaxListeners("and even this");
});

e.emit('maxListeners');

assert(gotEvent);