我有下面的方法，我需要使用mockito进行测试：

public User update(project.models.domain.User userObject) {
        var user = validateIfUserExists(userObject);
        var agroupmentFoundInDatabase = validateIfUserExistsInAgroupmentTable(userObject);
        User result = userRepository.save(user);
        if(!agroupmentFoundInDatabase.getProfileCode().equals(userObject.getProfile().getCode())) {     
            userUnionProfileRepository.delete(agroupmentFoundInDatabase);
            userUnionProfileRepository
            .save(UserUnionProfile.builder().userCode(userObject.getId())
                    .profileCode(userObject.getProfile().getCode()).build());
        return result;
    }

这是我的测试方法：

@Test
public void update() throws Exception {
br.com.rd.productmodels.product.domain.User userObject = mockUser();
User user = User.builder().code(135).description("test").build();
when(repository.findById(any())).thenReturn(Optional.of(user));
when(mapper.map(userObject, User.class)).thenReturn(user);
UserUnionProfile agroupmentObject = UserUnionProfile.builder().userCode(135).profileCode(12).build();
when(userUnionProfileRepository.findById(any())).thenReturn(Optional.of(agroupmentObject));
when(mapper.map(agroupmentObject,UserUnionProfile.class)).thenReturn(agroupmentObject);
when(repository.save(any())).thenReturn(user);
User entity = service.update(userObject);
verify(repository).save(any());
assertNotNull(entity);
}

但是当我运行我的测试时，它给出了以下消息：

PotentialStubbingProblem: Strict stubbing argument mismatch. Please check:
 - this invocation of 'map' method:
    mapper.map(Optional[UserUnionProfile(userCode=135, profileCode=12)],class project.domain.UserUnionProfile
);

我试过使用 @MockitoSettings(strictness = Strictness.LENIENT) 。错误消失了，但是在执行 mapper.map(Optional[UserUnionProfile(userCode=135, profileCode=12)],class project.domain.UserUnionProfile 行之后，我的结果是null。我该怎么办？

#更多关于我尝试测试的update方法的详细信息。下面是调用的其他方法：

private User validateIfUserExists(project.models.domain.User userObject) {
    var user = userRepository.findById(userObject.getId());
    if (user.isEmpty()) {
        throw new UserNotFoundException(userObject.getId());
    return mapper.map(userObject, User.class);
private UserUnionProfile validateIfUserExistsInAgroupmentTable(project.models.domain.User userObject) {
        var agroupmentObject = userUnionProfileRepository.findById(userObject.getId());