27. 페이지네이션v5

Mar 18, 2024

findAll_paging_test()하기 : 페이지네이션


package shop.mtcoding.blog.User;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import shop.mtcoding.blog.user.User;
import shop.mtcoding.blog.user.UserJPARepository;

import java.util.Optional;

@DataJpaTest // import 안해도 IoC에 띄워줌
public class UserJPARepositoryTest {

    @Autowired
    private UserJPARepository userJPARepository;

    @Test
    public void findAll_paging_test() throws JsonProcessingException {
        // given
        Sort sort = Sort.by(Sort.Direction.DESC, "id");
        Pageable pageable = PageRequest.of(0, 3, sort);
        // when
        Page<User> userPG= userJPARepository.findAll(pageable);
        // then
        ObjectMapper om = new ObjectMapper(); // json으로 변경
        String json = om.writeValueAsString(userPG);
        System.out.println(json);
    }
}