RepositoryTest

import static org.assertj.core.api.Assertions.assertThat;

@RunWith(SpringRunner.class)
@DataJpaTest
public class StudentRepositoryTest {

    @Autowired
    private TestEntityManager testEntityManager;

    @Autowired
    private StudentRepository studentRepository;

    private static final String STUDENT_ID = "sw25/2013";
    private static final String STUDENT_FIRST_NAME = "Mina";
    private static final String STUDENT_LAST_NAME = "Medic";

    @Test
    public void shouldReturnEmptyOptionalWhenFindingNonExistingStudentByID() {
        Optional<Student> student = studentRepository.findByIdentificationNumber(STUDENT_ID);

        assertFalse("Student is not present.", student.isPresent());
    }

    @Test
    public void shouldReturnStudentWhenFindingExistingStudentByID() {
        Student student = new Student(null, STUDENT_FIRST_NAME, STUDENT_LAST_NAME, STUDENT_ID);
        testEntityManager.persist(student);
        testEntityManager.flush();

        Optional<Student> foundStudent = studentRepository.findByIdentificationNumber(STUDENT_ID);
        assertThat(foundStudent.get()).isEqualToComparingFieldByField(student);

    }
}