AsseticBundle\Service::getFilterManager PHP Method

    public function getFilterManager()
    {
        if (null === $this->filterManager) {
            $this->filterManager = new AsseticFilterManager();
        }
        return $this->filterManager;
    }

 public function testGetFilterManager()
 {
     $result = $this->object->getFilterManager();
     $this->assertInstanceOf('Assetic\\FilterManager', $result);
 }