How do I use Data JPA in Spring Boot for testing?

How do I use Data JPA in Spring Boot for testing?

You can use Spring Data JPA to simplify database interactions in your Spring Boot tests. Would you like a code example?

Yes, please provide a code example for setting up a test.

Sure! You can use @DataJpaTest to configure an in-memory database for your tests. Here's a simple example:

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

    @Autowired
    private UserRepository userRepository;

    @Test
    public void testFindByUsername() {
        User user = new User("john_doe");
        userRepository.save(user);
        User found = userRepository.findByUsername("john_doe");
        assertEquals(user.getUsername(), found.getUsername());
    }
}

What dependencies do I need for this to work?

You'll need the Spring Data JPA and an in-memory database like H2. Add these to your pom.xml:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
    <groupId>com.h2database</groupId>
    <artifactId>h2</artifactId>
    <scope>test</scope>
</dependency>