how to verify a void function is been called in spring integration test

Question

I have wrote an integration for testing a delete function like as shown below

@Test
void deleteUsersTest() {
    Map<String, String> params = new HashMap<>();
    params.put("id", "21");
    this.template.delete("/v1/users/{id}", params);
    :
}

The problem I am facing is, since it is a void function I would like to verify the below function is been called internally

userRepository.deleteById(21)

In Unit test I usually used something like this

verify(userRepository, times(1)).deleteById((long) 21);

but the above one is mockito based function which I cannot used in Integration test

Can someone help me on how to verify this function in Spring Integration test

I am using Spring 5, Spring Boot 2.1

Answer 1

Integration testing happens on a real database. Just ensure that the entity is stored in your database before calling delete and not stored in your database after calling delete.

@BeforeEach
public void setDatabase() {
    client1 = new Client();
    client1.setName("Karl");
    client2 = new Client();
    client2.setName("Pauline");

    testEntityManager.persist(client1);
    testEntityManager.persist(client2);
    testEntityManager.flush();
}

@Test
public void deleteTest() {
    clientRepository.deleteById(client1.getId());

    List<Client> clientListActual = clientRepository.findAll();
    boolean clientExists = clientListActual.contains(client1);

    assertFalse(clientExists);
    assertEquals(1, clientListActual.size());
}