Repository Test in spring boot leads to Unknown entity Exception - unit-testing

Question

com.mohendra.user
server
Application.class //Main class
package2
package3
domain
Campaigns.class
SmsDomainPackage.class
repository
CampaignRepository.class
The above is my folder structure, I am tryring to test CampaignRepository using spring dataJpaTest ,
I have written the following test
#ComponentScan(basePackages = "com.mohendra.user")
#EntityScan(basePackageClasses = SmsDomainPackage.class)
#RunWith(SpringRunner.class)
#SpringBootTest(classes = Application.class)
#DataJpaTest
#RestClientTest
public class CampaignRepositoryTest {
#Autowired
private TestEntityManager entityManager;
#Autowired
private CampaignRepository repository;
#Before
public void setUp() throws Exception {
}
#Test
public void findByCode() {
Campaigns campaigns = new Campaigns();
campaigns.setName("Name");
campaigns.setCode("HELP123");
campaigns.setStartDate(new Date());
campaigns.setEndDate(new Date());
this.entityManager.persist(campaigns);
Campaigns campaigns1 = repository.findByCode("HELP123");
System.out.println();
}
}
The test gives an exception of
java.lang.IllegalArgumentException: Unknown entity:
com.mohendra.user.package3.domain.Campaigns
I have also used #ComponentScan as you can see, and I've also used #EntityScan to try scan entities from packages, but both of them dont work.
I cannot change my folder structure to make it standard, as it is not my project. Is there a solution to it?

Answer 1

The Application class should be in the root package. That way you will not need any #CompontenScan or #EntityScan because Spring Boot scans everything below your root package
Therefor I recomment to put Application.class in the package com.mohendra.user
And you have to decide which test slice you want. You have three:
#SpringBootTest(classes = Application.class)
#DataJpaTest
#RestClientTest
But I assume that you only want #DataJpaTest