public function testGetOnlyListeners()
{
$listeners = array(array(1 => 'event', 4 => 'subscriber'), array(1 => 'event', 4 => 'listener'), array(4 => 'listener'));
$filter = new ListenerFilter();
$filtered = $filter->getListeners($listeners);
$this->assertCount(2, $filtered);
foreach ($filtered as $listener) {
$this->assertEquals($listener[4], 'listener');
}
}
