Junior — Middle

Какими способами вы подключаете внешние зависимости при написании тестов?

sobes.tech AI

Answer from AI

When writing tests, external dependencies are usually connected using:

Mock objects — using libraries such as Mockito or EasyMock to create dependency simulations, isolating the tested code.
Dependency Injection (DI) — dependencies are passed into the class under test via constructor or setters, allowing mocks or stubs to be substituted.
Using test configurations — for example, in Spring Boot, separate configurations can be created for tests where necessary dependencies are connected.
Integration tests with real dependencies — connecting real services or databases, often through test containers (Testcontainers).

Example with Mockito:

@RunWith(MockitoJUnitRunner.class)
public class UserServiceTest {
    @Mock
    private UserRepository userRepository;

    @InjectMocks
    private UserService userService;

    @Test
    public void testGetUser() {
        when(userRepository.findById(1L)).thenReturn(Optional.of(new User(1L, "John")));
        User user = userService.getUser(1L);
        assertEquals("John", user.getName());
    }
}

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