public function testConnectionStorage()
 {
     $sqlite = new db\PDOMock('sqlite');
     $cs = new db\ConnectionStorage();
     $cs->add($sqlite, db\ConnectionStorage::SQLITE, 'db', true);
     $registry = new app\Registry();
     $registry->connectionStorage = $cs;
     $this->assertEquals($cs, $registry->getConnectionStorage());
     $this->assertEquals($sqlite, $registry->getDb());
 }