public function testConstruct()
{
$serviceManager = new ServiceManager();
$serviceManager->setService('config', array('asset_manager' => array('filters' => array('css' => array('filter' => 'Lessphp')))));
$serviceManager->setService(MimeResolver::class, new MimeResolver());
$t = new AssetFilterManagerServiceFactory($serviceManager);
$service = $t->createService($serviceManager);
$this->assertTrue($service instanceof AssetFilterManager);
}