Hey Invaders! 👽

#100daysofcode day 17: I completed section 12: Testing Data Layer only, focusing on JPA entities. This insightful section taught me how to ensure data integrity and consistency through JPA testing. I learned the process of verifying the persistence of a UserEntity, testing constraints like unique user IDs, and handling validation for entity fields.

Here's how I set up the test to ensure a UserEntity persists correctly with valid details:

@DataJpaTest
public class UserEntityIntegrationTest {
    @Autowired
    private TestEntityManager testEntityManager;

    UserEntity userEntity;

    @BeforeEach
    void setUp(){
        userEntity = new UserEntity();
        userEntity.setUserId(UUID.randomUUID().toString());
        userEntity.setFirstName("Ari");
        userEntity.setLastName("Vanegas");
        userEntity.setEmail("[email protected]");
        userEntity.setEncryptedPassword("123456789");
    }

    @Test
    void testUserEntity_whenValidUserDetailsProvided_shouldReturnStoredUserDetails(){
        // Arrange

        // Act
        UserEntity storedUserEntity = testEntityManager.persistAndFlush(userEntity);

        // Assert
        assertTrue(storedUserEntity.getId() > 0);
        assertEquals(userEntity.getUserId(), storedUserEntity.getUserId());
        assertEquals(userEntity.getFirstName(), storedUserEntity.getFirstName());
        assertEquals(userEntity.getLastName(), storedUserEntity.getLastName());
        assertEquals(userEntity.getEmail(), storedUserEntity.getEmail());
        assertEquals(userEntity.getEncryptedPassword(), storedUserEntity.getEncryptedPassword());
    }
}

What I Learned:

• @DataJpaTest: This annotation provides a dedicated test environment for JPA-related tests, ensuring that only JPA components are loaded.

• TestEntityManager: A core component for JPA testing, allowing for straightforward persistence operations and state verifications.

• Entity Testing: Techniques to validate entity persistence, check constraints, and ensure entity field validations are functioning as expected.

This comprehensive approach to testing JPA entities is crucial for maintaining robust data integrity and consistency in applications, providing a solid foundation for reliable database operations.

You can check out the rest of this test file on my Git Hub!