@Transactional annotation overwrites Mockito's InjectMocks

Question

In class TeacherDao method create() calls AddressDao.create():

public void create(Teacher teacher) {
    addressDao.create(teacher.getAddress());
    // Teacher is being written to database...
}

I am writing a Junit5 test for TeacherDao class, so AddressDao is replaced with a mock. I call TeacherDao.create() and verify that AddressDao.create() is being interacted:

@Mock
private AddressDao addressDao;
@InjectMocks
@Autowired
private TeacherDao teacherDao;
@Test
void teacherDaoCreateTest() {
     teacherDao.create(teacher);
     verify(addressDao).create(testAddress);
}

Verification is successful. After that I add @Transactional annotation to TeacherDao.create() method, and test fails. AddressDao mock now has zero interactions, and testAddress is being actually written to the database. I don't totally understand how @Transactional works in-depth and must be missing something important. Why @Transactional rewrites mocks?

Did you take a look at the answers here? https://stackoverflow.com/questions/21124326/how-to-inject-mock-into-service-that-has-transactional — Babyburger, Jul 02 '21 at 13:49
I did, that question was asked 8 years ago, Mockito and Spring could go far away. — Ilyas Saitov, Jul 02 '21 at 13:50

score 0 · Answer 1 · answered Jul 02 '21 at 20:14

0

I think you should delete the @Autowired annotation.

answered Jul 02 '21 at 20:14

Julien Gavard

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@Transactional annotation overwrites Mockito's InjectMocks

1 Answers1