public function testGetOnlySubscribers() { $listeners = array(array(1 => 'event', 4 => 'subscriber'), array(1 => 'event', 4 => 'listener'), array(4 => 'listener')); $filter = new ListenerFilter(); $filtered = $filter->getSubscribers($listeners); $this->assertCount(1, $filtered); $this->assertEquals('subscriber', $filtered[0][4]); }