Bluz\Db\Db::handler PHP Method

    public function handler()
    {
        if (empty($this->handler)) {
            $this->connect();
        }
        return $this->handler;
    }

 /**
  * Initial Db with configuration
  */
 public function testCheckConnect()
 {
     $this->db->connect();
     $this->assertInstanceOf('\\Pdo', $this->db->handler());
 }