How to write Integration test cases in Spock

Below code helps to find wite spock based test case

import org.springframework.beans.factory.annotation.Autowired;

import spock.lang.Specification

@ContextConfiguration(['classpath*:META-INF/spring/applicationContext.xml'])
@Transactional
class TravelDetailDaoSpec extends Specification {

@Autowired
private TravelDetailDao travelDetailDao;


def "store TravelDetail  into db"() {
given:
TravelDetailVO TravelDetailVO =new TravelDetailVO();
TravelDetailVO.setId("C001");
TravelDetailVO.setPlace("vancouver");
TravelDetailVO.setCountry("canada");

when:
travelDetailDao.create(TravelDetailVO);
List<TravelDetailVO> list=travelDetailDao.getDetails("C001");
then:
assertTrue ("Saved Successfully",list.size()>0);

}