EventManagerTest.php

<?php
/**
 * Zend Framework (http://framework.zend.com/)
 *
 * @link      http://github.com/zendframework/zf2 for the canonical source repository
 * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

namespace ZendTest\EventManager;

use Zend\EventManager\Event;
use Zend\EventManager\EventManager;
use Zend\EventManager\Exception\RuntimeException;

class TestFoo
{
    public static $isTriggered = false;

    public function __invoke()
    {
        self::$isTriggered = true;
    }
}

class EventManagerTest extends \PHPUnit_Framework_TestCase
{
    public function testLazyInstantiator()
    {
        TestFoo::$isTriggered = false;

        $eventManager = new EventManager(function ($requestedListener) {
            // The method name isn't being passed here (I defined as __invoke, but I don't think it matters??)
            $this->assertSame('ZendTest\EventManager\TestFoo', $requestedListener);
            return new TestFoo();
        });

        $eventManager->attach('MyEvent', [TestFoo::class, '__invoke']);

        $event = new Event();
        $eventManager->trigger('MyEvent', $event);

        $this->assertTrue(TestFoo::$isTriggered);
    }
}