#DataJpaTest not loading required classes - unit-testing

Question

I'm attempting to set up some Spring Boot JPA tests using:
package biz.ianw.coindatabase.test;
#RunWith(SpringRunner.class)
#DataJpaTest
public class DbTests {
#Test
public void test1() { ... }
}
I have a service class:
package biz.ianw.coindatabase.database;
//#Service
#Repository
#Transactional(readOnly=false)
public class CoinDbService { ... }
and an application:
package biz.ianw.coindatabase;
#SpringBootApplication
#Slf4j
#Configuration
#EnableEncryptableProperties
public class Main {
#Autowired
CoinDbService dbService;
... }
Starting the test gives the error:
Field dbService in biz.ianw.coindatabase.Main required a bean of type 'biz.ianw.coindatabase.database.CoinDbService' that could not be found.
This is, I assumed, something to do with the type of beans #DataJpaTest loads during startup:
#DataJpaTest can be used if you want to test JPA applications. By
default it will configure an in-memory embedded database, scan for
#Entity classes and configure Spring Data JPA repositories. Regular
#Component beans will not be loaded into the ApplicationContext.
I'm not quite sure why #Service classes should be considered as not required for JPA testing, but I tried to force the matter by annotating it as #Repository instead, but to no avail.
I can manually load the class with #Import(...) but it seems a tad hooky. Is there a better way to tell DataJpaTest what I need for testing?

Answer 1

I am quoting from DataJpaTest documentation where you can find the answer to your question.
Annotation that can be used in combination with
#RunWith(SpringRunner.class) for a typical JPA test. Can be used when
a test focuses only on JPA components.
Using this annotation will disable full auto-configuration and instead
apply only configuration relevant to JPA tests.
By default, tests annotated with #DataJpaTest will use an embedded
in-memory database (replacing any explicit or usually auto-configured
DataSource). The #AutoConfigureTestDatabase annotation can be used to
override these settings.
If you are looking to load your full application configuration, but
use an embedded database, you should consider #SpringBootTest combined
with #AutoConfigureTestDatabase rather than this annotation.