[Java Spring Data] JapRepository

All features of CrudRepository plus:

void flush();
saveAndFlush()
delteInBatch()
delteAllInBatch()

package com.example.university.repo;
 
import com.example.university.domain.Department;
import org.springframework.data.jpa.repository.JpaRepository;
 
/**
 * DataSource Management for the Departments at the University.
 *
 * Created by maryellenbowman
 */
public interface DepartmentRepository extends JpaRepository<Department, Integer> {
 
}

test:

package com.example.university;
 
import com.example.university.domain.Department;
import com.example.university.repo.DepartmentRepository;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
 
 
/**
 * Demonstrate JPA Repository methods with DepartmentRepository
 * <p>
 * Created by maryellenbowman
 */
 
@RunWith(SpringRunner.class)
@SpringBootTest
public class JpaRepositoryDemo {
    @Autowired
    private DepartmentRepository departmentRepository;
    /**
     * Exercise JPA Repository methods.
     */
    @Test
    public void runJpaRepositoryMethods() {
 
        departmentRepository.save(new Department("Humanities"));
        departmentRepository.flush();
 
        departmentRepository.saveAndFlush(new Department("Fine Arts"));
 
        departmentRepository.save(new Department("Social Science"));
 
        System.out.println("\n*************3 Departments*************");
        departmentRepository.findAll().forEach(System.out::println);
 
        departmentRepository.deleteInBatch(
                departmentRepository.findAll().subList(0,1));
 
        System.out.println("\n*************1 Less Departments*************");
        departmentRepository.findAll().forEach(System.out::println);
        departmentRepository.deleteAllInBatch();
        System.out.println("\n*************Zero Departments*************");
        departmentRepository.findAll().forEach(System.out::println);
 
    }
    @Before
    @After
    public void banner() {
        System.out.println("\n\n-------------------------------------------------" +
                "-------------------------------------\n");
    }
}