Какие библиотеки для тестов использовал

@Test
void testUserService() {
    UserRepository mockRepo = Mockito.mock(UserRepository.class);
    UserService service = new UserService(mockRepo);
    
    Mockito.when(mockRepo.findById(1L))
           .thenReturn(Optional.of(new User(1L, "test")));
           
    User result = service.getUserById(1L);
    
    assertThat(result)
        .isNotNull()
        .hasFieldOrPropertyWithValue("name", "test");
}