Edit: ContainerAwareEventDispatcherTest.php

Editing: ContainerAwareEventDispatcherTest.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\EventDispatcher\Tests;

use Symfony\Component\DependencyInjection\Container;
use Symfony\Component\DependencyInjection\Scope;
use Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher;
use Symfony\Component\EventDispatcher\Event;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

class ContainerAwareEventDispatcherTest extends \PHPUnit_Framework_TestCase
{
    public function testAddAListenerService()
    {
        $event = new Event();

$service = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$service
            ->expects($this->once())
            ->method('onEvent')
            ->with($event)
        ;

$container = new Container();
        $container->set('service.listener', $service);

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'));

$dispatcher->dispatch('onEvent', $event);
    }

public function testAddASubscriberService()
    {
        $event = new Event();

$service = $this->getMock('Symfony\Component\EventDispatcher\Tests\SubscriberService');

$service
            ->expects($this->once())
            ->method('onEvent')
            ->with($event)
        ;

$container = new Container();
        $container->set('service.subscriber', $service);

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addSubscriberService('service.subscriber', 'Symfony\Component\EventDispatcher\Tests\SubscriberService');

$dispatcher->dispatch('onEvent', $event);
    }

public function testPreventDuplicateListenerService()
    {
        $event = new Event();

$service = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$service
            ->expects($this->once())
            ->method('onEvent')
            ->with($event)
        ;

$container = new Container();
        $container->set('service.listener', $service);

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'), 5);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'), 10);

$dispatcher->dispatch('onEvent', $event);
    }

/**
     * @expectedException \InvalidArgumentException
     */
    public function testTriggerAListenerServiceOutOfScope()
    {
        $service = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$scope = new Scope('scope');
        $container = new Container();
        $container->addScope($scope);
        $container->enterScope('scope');

$container->set('service.listener', $service, 'scope');

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'));

$container->leaveScope('scope');
        $dispatcher->dispatch('onEvent');
    }

public function testReEnteringAScope()
    {
        $event = new Event();

$service1 = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$service1
            ->expects($this->exactly(2))
            ->method('onEvent')
            ->with($event)
        ;

$scope = new Scope('scope');
        $container = new Container();
        $container->addScope($scope);
        $container->enterScope('scope');

$container->set('service.listener', $service1, 'scope');

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'));
        $dispatcher->dispatch('onEvent', $event);

$service2 = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$service2
            ->expects($this->once())
            ->method('onEvent')
            ->with($event)
        ;

$container->enterScope('scope');
        $container->set('service.listener', $service2, 'scope');

$dispatcher->dispatch('onEvent', $event);

$container->leaveScope('scope');

$dispatcher->dispatch('onEvent');
    }

public function testHasListenersOnLazyLoad()
    {
        $event = new Event();

$service = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$container = new Container();
        $container->set('service.listener', $service);

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'));

$event->setDispatcher($dispatcher);
        $event->setName('onEvent');

$service
            ->expects($this->once())
            ->method('onEvent')
            ->with($event)
        ;

$this->assertTrue($dispatcher->hasListeners());

if ($dispatcher->hasListeners('onEvent')) {
            $dispatcher->dispatch('onEvent');
        }
    }

public function testGetListenersOnLazyLoad()
    {
        $service = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$container = new Container();
        $container->set('service.listener', $service);

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'));

$listeners = $dispatcher->getListeners();

$this->assertTrue(isset($listeners['onEvent']));

$this->assertCount(1, $dispatcher->getListeners('onEvent'));
    }

public function testRemoveAfterDispatch()
    {
        $service = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$container = new Container();
        $container->set('service.listener', $service);

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'));

$dispatcher->dispatch('onEvent', new Event());
        $dispatcher->removeListener('onEvent', array($container->get('service.listener'), 'onEvent'));
        $this->assertFalse($dispatcher->hasListeners('onEvent'));
    }

public function testRemoveBeforeDispatch()
    {
        $service = $this->getMock('Symfony\Component\EventDispatcher\Tests\Service');

$container = new Container();
        $container->set('service.listener', $service);

$dispatcher = new ContainerAwareEventDispatcher($container);
        $dispatcher->addListenerService('onEvent', array('service.listener', 'onEvent'));

$dispatcher->removeListener('onEvent', array($container->get('service.listener'), 'onEvent'));
        $this->assertFalse($dispatcher->hasListeners('onEvent'));
    }
}

class Service
{
    public function onEvent(Event $e)
    {
    }
}

class SubscriberService implements EventSubscriberInterface
{
    public static function getSubscribedEvents()
    {
        return array(
            'onEvent' => 'onEvent',
            'onEvent' => array('onEvent', 10),
            'onEvent' => array('onEvent'),
        );
    }

public function onEvent(Event $e)
    {
    }
}