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'); } }