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Why ReactiveMongoTemplate save does not work with Testcontainers

I have a spring-boot application.
I have entity:
#Data
#Builder
#NoArgsConstructor
#AllArgsConstructor
#Document(COLLECTION_NAME)
public class PersonEntity {
public static final String COLLECTION_NAME = "person_info";
private static final String PERSON_NAME = "person_name";
#Id
private PersonId id;
#Field(name = PERSON_NAME)
private String personName;
#Indexed(name = "ttl_index", expireAfterSeconds=20)
private LocalDateTime date;
}
I have a repository interface:
public interface PersonRepository {
void saveWithTtl(PersonEntity entity);
}
The repository implementation:
#Slf4j
#Repository
public class PersonRepositoryImpl implements PersonRepository {
private final int expireAfterSeconds;
private final ReactiveMongoTemplate mongoTemplate;
public PersonRepositoryImpl(#Value("${ttl.index}") int expireAfterSeconds,
ReactiveMongoTemplate mongoTemplate) {
this.expireAfterSeconds = expireAfterSeconds;
this.mongoTemplate = mongoTemplate;
}
#Override
public void saveWithTtl(PersonEntity entity) {
mongoTemplate.indexOps(PersonEntity.class)
.ensureIndex(new Index().on(PersonEntity.CREATED_AT, ASC)
.expire(expireAfterSeconds)).subscribe(result -> log.info("Ttl index has been created: {}", result));
mongoTemplate.save(entity).subscribe(result -> log.info("Entity has been saved: {}", result));
}
}
And, finally, I have test that does not work:
#DataMongoTest
#Testcontainers
public class PersonRepositoryIT {
#Autowired
private ReactiveMongoTemplate mongoTemplate;
#Autowired
private PersonRepository repository;
#Container
private static MongoDbContainer mongoDbContainer = new MongoDbContainer();
#AfterEach
void cleanUp() {
repository.deleteAll();
}
#DynamicPropertySource
static void registerMongoProperties(DynamicPropertyRegistry registry) {
registry.add("spring.data.mongodb.uri", mongoDbContainer::getReplicaSetUrl);
}
#Test
public void shouldCreateAndDeleteRecordsAfterDelay_whenSaveWithTtl_givenDefinedTll() {
//given
PersonEntity givenEntity = PersonEntity.builder().createdAt(LocalDateTime.now())
.personName("Joe")
.id(PERSON_ID).build();
//when
repository.saveWithTtl(givenEntity);
//then
StepVerifier.create(mongoTemplate.estimatedCount(PersonEntity.COLLECTION_NAME))
.expectNext(1L)
.verifyComplete();
}
}
On expectNext it fails coz it returns 0 and not 1.
mongoTemplate.estimatedCount returns 0
When I test the repository from Postman (repo is calling inside service), it creates the document in MongoDB wil ttl index, as expected.
In test fonfig I have set the ${ttl.index} to 20.
What am I doing wrong?

I don't know if it is to late, but I had the same problem today.
I Found your question looking for an answer for my problem hahahaha.
This snipped worked for me:
#Container
public static MongoDBContainer container = new MongoDBContainer(DockerImageName.parse("mongo:6"));
#DynamicPropertySource
static void mongoDbProperties(DynamicPropertyRegistry registry) {
registry.add("spring.data.mongodb.uri", container::getReplicaSetUrl);
}
#Bean
public ReactiveMongoTemplate reactiveMongoTemplate() throws Exception {
container.start();
ConnectionString connectionString = new ConnectionString(container.getReplicaSetUrl());
MongoClientSettings mongoClientSettings = MongoClientSettings.builder()
.applyConnectionString(connectionString)
.build();
MongoClient mongoClient = MongoClients.create(mongoClientSettings);
return new ReactiveMongoTemplate(mongoClient,"test");
}
Apparently ReactiveMongoTemplate is not being injected by default, then I created my own Bean an it worked

Mock update method in Junit

How to write unit test (via Junit) for MongoTemplate updateFirst() method ?
I have this service class:
#Service
public class TemplateServiceImpl implements TemplateService
{
#Resource
private TemplateRepository templateRepository;
#Resource
private MongoTemplate mongoTemplate;
#Override
public TemplateDto create(TemplateDto templateDto)
{
TemplateDto result;
templateDto.setDeleted(false);
result = templateRepository.insert(templateDto);
return result;
}
#Override
public boolean update(ObjectId id, TemplateDto templateDto)
{
if (templateDto != null)
{
Update update = new Update();
if (templateDto.getName() != null)
{
update.set("name", templateDto.getName());
}
if (templateDto.getTemplate() != null)
{
update.set("template", templateDto.getTemplate());
}
if (templateDto.isDeleted())
{
update.set("deleted", Boolean.TRUE);
}
update.set("lastUpdate", new Date());
return mongoTemplate.updateFirst(new Query(Criteria.where("_id").is(id)), update, "template")
.wasAcknowledged();
}
return false;
}
}
I want write unit test for update method . This is my relevant test class:
#ExtendWith(MockitoExtension.class)
class TemplateServiceImplTest
{
#InjectMocks
private static TemplateServiceImpl templateService;
#Mock
private static TemplateRepository templateRepository;
#Mock
private static MongoTemplate mongoTemplate;
private static TemplateDto templateDto;
private static List<TemplateDto> listOfTemplates;
private static String requestBody;
#BeforeAll
private static void setUp(){
templateDto = createTemplateDto();
listOfTemplates = createListOfTemplate();
requestBody = createRequesyBody();
}
#Test
void create()
{
when(templateRepository.insert(templateDto)).thenReturn(templateDto);
TemplateDto actualResult = templateService.create(TemplateServiceImplTest.templateDto);
assertThat(actualResult).isNotNull();
assertThat(actualResult).isInstanceOf(TemplateDto.class);
assertThat(actualResult.getId()).isEqualTo(templateDto.getId());
}
#Test
void update()
{
Update update = new Update();
/*
when(mongoTemplate.updateFirst(new Query(Criteria.where("_id").is(templateDto.getId().toString())) ,update , TemplateDto.class)).thenReturn(
UpdateResult.acknowledged());
*/
/*
given(mongoTemplate.updateFirst(new Query(Criteria.where("_id").is(templateDto.getId().toString())) ,update , TemplateDto.class));
*/
boolean actualResult = templateService.update(templateDto.getId(), templateDto);
assertThat(actualResult).isNotNull();
assertThat(actualResult).isTrue();
}
// other methods...
}
When I run test I get NPE for mongoTemplate at update method , I searched and I saw this 2 approach:
when(mongoTemplate.updateFirst(new Query(Criteria.where("_id").is(templateDto.getId().toString())) ,update , TemplateDto.class)).thenReturn(
UpdateResult.acknowledged());
Or
given(mongoTemplate.updateFirst(new Query(Criteria.where("_id").is(templateDto.getId().toString())) ,update , TemplateDto.class));
But none of them worked .
actually how to test MongoTemplate updateFirst method?
Thanks

Unit Test for Redis cache in Java

Note: I already look at and tried some approaches on SO e.g. How to test Spring's declarative caching support on Spring Data repositories?, but as most of them old, I cannot make them work properly and I need a solution with the latest library versions. So, I would be appreciated if you have a look at the question and help.
#Service
#EnableCaching
#RequiredArgsConstructor
public class DemoServiceImpl implements DemoService {
private static final String CACHE_NAME = "demoCache";
private final LabelRepository labelRepository;
private final LabelTranslatableRepository translatableRepository;
private final LanguageService languageService;
#Override
public LabelDTO findByUuid(UUID uuid) {
final Label label = labelRepository.findByUuid(uuid)
.orElseThrow(() -> new EntityNotFoundException("Not found."));
final List<LabelTranslatable> translatableList = translatableRepository.findAllByEntityUuid(uuid);
return new LabelDTO(Pair.of(label.getUuid(), label.getKey()), translatableList);
}
}
I created the following Unit Test to test caching for the nethod above:
#EnableCaching
#ImportAutoConfiguration(classes = {
CacheAutoConfiguration.class,
RedisAutoConfiguration.class
})
#ExtendWith(MockitoExtension.class)
class TextLabelServiceImpl_deneme_Test {
#Autowired
private CacheManager cacheManager;
#InjectMocks
private LabelService labelService;
#Mock
private LabelRepository labelRepository;
#Mock
private LabelTranslatableRepository translatableRepository;
#Test
void test_Cache() {
UUID uuid = UUID.randomUUID();
final TextLabel textLabel = new TextLabel();
textLabel.setId(1);
textLabel.setKey("key1");
TextLabelTranslatable textLabelTranslatable = new TextLabelTranslatable();
textLabelTranslatable.setEntityUuid(uuid);
textLabelTranslatable.setLanguage(SupportedLanguage.fr);
textLabelTranslatable.setValue("value1");
final List<TextLabelTranslatable> translatableList = new ArrayList<>();
translatableList.add(textLabelTranslatable);
when(labelRepository.findByUuid(uuid)).thenReturn(Optional.of(textLabel));
when(translatableRepository.findAllByEntityUuid(uuid)).thenReturn(translatableList);
TextLabelDTO result1 = labelService.findByUuid(uuid);
TextLabelDTO result2 = labelService.findByUuid(uuid);
assertEquals(result1, result2);
Mockito.verify(translatableRepository, Mockito.times(1)).findAllByEntityUuid(uuid);
}
I am not sure if there is a missing part in my test, but at the last line (Mockito.verify()), it returns 2 instead of 1 that means caching not works. But it is working properly and there is a problem in my test I think. How should I complete the unit test to check the caching properly?

You need to annotate the service class method with #Cacheable. Try to follow the code in this tutorial. The following test code works as expected
#Import({CacheConfig.class, DemoServiceImpl.class})
#ExtendWith(SpringExtension.class)
#EnableCaching
#ImportAutoConfiguration(classes = {
CacheAutoConfiguration.class,
RedisAutoConfiguration.class
})
class DemoServiceImplTest {
#MockBean
private LabelRepository labelRepository;
#Autowired
private DemoServiceImpl demoService;
#Autowired
private CacheManager cacheManager;
#TestConfiguration
static class EmbeddedRedisConfiguration {
private final RedisServer redisServer;
public EmbeddedRedisConfiguration() {
this.redisServer = new RedisServer();
}
#PostConstruct
public void startRedis() {
redisServer.start();
}
#PreDestroy
public void stopRedis() {
this.redisServer.stop();
}
}
#Test
void givenRedisCaching_whenFindItemById_thenItemReturnedFromCache() {
UUID id = UUID.randomUUID();
Label aLabel = new Label(id, "label");
Mockito.when(labelRepository.findById(id)).thenReturn(Optional.of(aLabel));
Label labelCacheMiss = demoService.findByUuid(id);
Label labelCacheHit = demoService.findByUuid(id);
Mockito.verify(labelRepository, Mockito.times(1)).findById(id);
}
}
With this service class code:
#Service
#RequiredArgsConstructor
#EnableCaching
public class DemoServiceImpl {
public static final String CACHE_NAME = "demoCache";
private final LabelRepository labelRepository;
#Cacheable(value = CACHE_NAME)
public Label findByUuid(UUID uuid) {
return labelRepository.findById(uuid)
.orElseThrow(() -> new EntityNotFoundException("Not found."));
}
}
And this CacheConfig:
#Configuration
public class CacheConfig {
#Bean
public RedisCacheManagerBuilderCustomizer redisCacheManagerBuilderCustomizer() {
return (builder) -> builder
.withCacheConfiguration(DemoServiceImpl.CACHE_NAME,
RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMinutes(10)));
}
#Bean
public RedisCacheConfiguration cacheConfiguration() {
return RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofMinutes(60))
.disableCachingNullValues()
.serializeValuesWith(
RedisSerializationContext.SerializationPair.fromSerializer(
new GenericJackson2JsonRedisSerializer()));
}
}

Problem trying to mock more than one Java Interface

I've been writting some tests for a legacy web app on java using DeltaSpike, Weld, Hibernate and others frameworks.
I have faced some problem with my first test class that injects many Mocked interfaces on a Service.
Let me show some code:
Service to be tested
public class DistribuicaoProcessoManualServiceImpl extends DistribuicaoService implements DistribuicaoProcessoManualService {
#Inject
#WebServiceTJDBEntityManager EntityManager wstjEM;
private ForoTJComarcaMPRepository foroMPRepository;
private AssuntoTJNaturezaMPRepository naturezaMPRepository;
private VaraTJVaraMPRepository varaMPRepository;
private ClasseTJTipoMPRepository tipoMPRepository;
private ProcessoRepository processoRepository;
private UsuarioRepository usuarioRepository;
private UsuarioDaSessao usuarioDaSessao;
/**
* #deprecated CDI eyes only
*/
public DistribuicaoProcessoManualServiceImpl() {
this(null, null, null, null, null, null, null);
}
#Inject
public DistribuicaoProcessoManualServiceImpl(
ForoTJComarcaMPRepository foroMPRepository,
AssuntoTJNaturezaMPRepository naturezaMPRepository,
ClasseTJTipoMPRepository tipoMPRepository,
ProcessoRepository processoRepository,
UsuarioRepository usuarioRepository,
UsuarioDaSessao usuarioDaSessao,
VaraTJVaraMPRepository varaMPRepository) {
this.foroMPRepository = foroMPRepository;
this.naturezaMPRepository = naturezaMPRepository;
this.tipoMPRepository = tipoMPRepository;
this.processoRepository = processoRepository;
this.usuarioRepository = usuarioRepository;
this.usuarioDaSessao = usuarioDaSessao;
this.varaMPRepository = varaMPRepository;
}
#Override
#Transactional(readOnly = false, qualifier = {WebServiceTJDBEntityManager.class})
public Processo vinculaOuPreparaParaEspecializacao(Processo processo) {
//Service do some validations here with Guava's Preconditions;
Usuario usuario = usuarioRepository.procurarPorLogin(usuarioDaSessao.getUsuario().getLogin());
processo.atualizaInformacoesDeProcuradoriaEUsuario(usuario);
ProcessoDoTJMapeamentoParaMP processoDePara = compoeMapeamento(processo);
VaraTJVaraMP varaMP = varaMPRepository.procurarPorIdVaraTJForoEPorProcuradoria(processoDePara);
ForoTJComarcaMP comarcaMP = foroMPRepository.procurarPorIdForoEPorProcuradoria(processoDePara);
AssuntoTJNaturezaMP naturezaMP = naturezaMPRepository.procurarPorAssuntoEPorProcuradoria(processoDePara);
ClasseTJTipoMP tipoMP = tipoMPRepository.procurarPorCodigoEPorProcuradoria(processoDePara);
processoDePara
.comComarcaMP(comarcaMP)
.comVaraMP(varaMP)
.comNaturezaMP(naturezaMP)
.comTipoMP(tipoMP);
processoRepository.inclui(processo);
return processo;
}
}
The extended Class:
public abstract class DistribuicaoService {
public ProcessoDoTJMapeamentoParaMP compoeMapeamento(Processo processo) {
return new ProcessoDoTJMapeamentoParaMP(processo);
}
}
The mapper/builder/aggregator:
public class ProcessoDoTJMapeamentoParaMP implements Serializable {
private static final long serialVersionUID = 1L;
private final Processo processo;
public ProcessoDoTJMapeamentoParaMP(final Processo processo) {
this.processo = processo;
this.comCamaraMP( OrgaoJulgadorTJCamaraMP.semEfeito() )
.comRelatorMP( RelatorTJRelatorMP.semEfeito() )
.comOrigemMP( new OrgaoJulgadorTJOrigemMP() )
.comTipoDeRemessaMP();
}
public ProcessoDoTJMapeamentoParaMP comComarcaMP(ComarcaMP comarcaMP) {
processo.getDadosOrigem().setCodigoComarcaMP(comarcaMP.getIdComarca());
return this;
}
public ProcessoDoTJMapeamentoParaMP comVaraMP(VaraMP varaMP) {
processo.getDadosOrigem().setCodigoVaraMP(varaMP.getIdVaraMP());
return this;
}
public ProcessoDoTJMapeamentoParaMP comNaturezaMP(AssuntoTJNaturezaMP naturezaMP) {
processo.getAssuntoPrincipal().setCodigoNaturezaMP(naturezaMP.getIdNatureza());
return this;
}
public ProcessoDoTJMapeamentoParaMP comTipoMP(ClasseTJTipoMP tipoMP) {
processo.getDadosProcesso().getClasse().setCodigoTipoMP(tipoMP.getIdTipo());
return this;
}
ProcessoDoTJMapeamentoParaMP comCamaraMP(OrgaoJulgadorTJCamaraMP camaraMP) {
processo.getDadosDistribuicao().getMapeamento().setCodigoCamaraMP(camaraMP.getIdCamara());
return this;
}
ProcessoDoTJMapeamentoParaMP comRelatorMP(RelatorTJRelatorMP relatorMP) {
processo.getDadosDistribuicao().getMapeamento().setCodigoRelatorMP(relatorMP.getIdRelatorMP());
return this;
}
ProcessoDoTJMapeamentoParaMP comOrigemMP(OrgaoJulgadorTJOrigemMP origemMP) {
processo.getDadosDistribuicao().getMapeamento().setCodigoOrigemMP(origemMP.getIdOrigem());
return this;
}
ProcessoDoTJMapeamentoParaMP comTipoDeRemessaMP() {
processo.setTipoRemessa(TipoDeRemessa.fromTipoDeProcesso(this.processo.getProcessoVirtualTJ()));
return this;
}
public Procuradoria getProcuradoria() {
return processo.getProcuradoria();
}
public Integer getCodigoForoTJ() {
return processo.getDadosOrigem().getCodigoForoPrimeiraInstancia();
}
public Integer getCodigoVaraTJ() {
return processo.getDadosOrigem().getCodigoVaraPrimeiraInstancia();
}
public List<Parte> getPartes() {
return processo.getPartes();
}
public String getNomeAssuntoTJ() {
return processo.getAssuntoPrincipal().getDescricaoAssunto();
}
public Integer getCodigoClasseTJ() {
return processo.getDadosProcesso().getClasse().getCodigoClasse();
}
public String getNomeOrgaoJulgadorTJ() {
return processo.getDadosDistribuicao().getOrgaoJulgador().getNomeOrgaoJulgador();
}
public String getNomeRelatorTJ() {
return processo.getDadosDistribuicao().getRelator().getNomeRelator();
}
public Integer getIdAssuntoTJ() {
return processo.getAssuntoPrincipal().getCodigoAssunto();
}
public Movimentacao getUltimoMovimento() {
return null;
}
Class for Test:
#SuppressWarnings("deprecation")
#RunWith(MockitoJUnitRunner.class)
public class DistribuicaoProcessoManualServiceTest {
#Mock private ForoTJComarcaMPRepository foroMPRepository;
#Mock private AssuntoTJNaturezaMPRepository naturezaMPRepository;
#Mock private VaraTJVaraMPRepository varaMPRepository;
#Mock private ClasseTJTipoMPRepository tipoMPRepository;
#Mock private ProcessoRepository processoRepository;
#Mock private UsuarioRepository usuarioRepository;
#Mock private Usuario usuario;
#Mock private Procuradoria procuradoria;
#Mock private VaraTJVaraMP varaMP;
#Mock private ForoTJComarcaMP comarcaMP;
#Mock private AssuntoTJNaturezaMP naturezaMP;
#Mock private ClasseTJTipoMP tipoMP;
#Mock private UsuarioDaSessao usuarioDaSessao;
#InjectMocks
private DistribuicaoProcessoManualServiceImpl service = new DistribuicaoProcessoManualServiceImpl();
private Processo processo;
#Before
public void setUpMethod() {
initMocks(this);
//Others Builders for populate "processo" here;
processo = ProcessoBuilder()
.com(hoje)
.com(PARECER)
.com(FISICO)
.com(dadosProcesso)
.com(dadosOrigem)
.com(distribuicao)
.com(fila)
.cria();
ProcessoDoTJMapeamentoParaMP mapeamento = new ProcessoDoTJMapeamentoParaMP(processo);
when(usuario.getLogin()).thenReturn("luizrodriguesj");
when(usuario.getProcuradoria()).thenReturn(procuradoria);
when(usuarioDaSessao.getUsuario()).thenReturn(usuario);
when(usuarioRepository.procurarPorLogin(anyString())).thenReturn(usuario);
when(comarcaMP.getIdComarca()).thenReturn(1);
when(foroMPRepository.procurarPorIdForoEPorProcuradoria(mapeamento)).thenReturn(comarcaMP);
when(varaMP.getIdVaraMP()).thenReturn(1);
when(varaMPRepository.procurarPorIdVaraTJForoEPorProcuradoria(mapeamento)).thenReturn(varaMP);
when(naturezaMP.getIdNatureza()).thenReturn(1);
when(naturezaMPRepository.procurarPorAssuntoEPorProcuradoria(mapeamento)).thenReturn(naturezaMP);
when(tipoMP.getIdTipo()).thenReturn(1);
when(tipoMPRepository.procurarPorCodigoEPorProcuradoria(mapeamento)).thenReturn(tipoMP);
}
Method with problem:
#Test(expected = ApplicationException.class)
public void naoPermitirDistribuicaoDeProcessoSemUmMapeamentoDeVaraCorrespondente() {
service.vinculaOuPreparaParaEspecializacao(processo);
}
The interface that it was possible to mock:
public interface UsuarioRepository extends GenericDAO<Usuario, Long> {
boolean isAutenticavel(Usuario usuario);
Usuario procurarPorLogin(String login);
List<Usuario> lista(UsuarioPesquisa pesquisa, Paginacao paginacao);
}
One of Interfaces that not obey instruction mock and return null:
public interface ForoTJComarcaMPRepository extends GenericDAO<ForoTJComarcaMP, Long> {
ForoTJComarcaMP procurarPorIdForoEPorProcuradoria(ProcessoDoTJMapeamentoParaMP processoDePara);
List<ForoTJComarcaMP> lista(DominioMPPesquisa pesquisa, Paginacao paginacao);
ForoTJComarcaMP procuraPorForoTJ(ForoTJComarcaMP foroTJComarcaMP);
ForoTJComarcaMP procuraPorEntidade(ForoTJComarcaMP clone);
List<ForoTJComarcaMP> listaMapeamentoDistinctPor(Procuradoria procuradoria);
}
After others methods in this class that runs without any problem, this last one just fails because a NullPointerException (NPE) that occurs in:
VaraTJVaraMP varaMP = varaMPRepository.procurarPorIdVaraTJForoEPorProcuradoria(processoDePara);
AssuntoTJNaturezaMP naturezaMP = naturezaMPRepository.procurarPorAssuntoEPorProcuradoria(processoDePara);
ClasseTJTipoMP tipoMP = tipoMPRepository.procurarPorCodigoEPorProcuradoria(processoDePara);
ForoTJComarcaMP comarcaMP = foroMPRepository.procurarPorIdForoEPorProcuradoria(processoDePara);
....
// The references "comarcaMP", "varaMP", "naturezaMP", "tipoMP" are null here and next step throws a NPE.
processoDePara
.comComarcaMP(comarcaMP)
Other Mocked Interface declared work without problem, like this one:
Usuario usuario = usuarioRepository.procurarPorLogin(usuarioDaSessao.getUsuario().getLogin());
Where the "usuario" reference is setted as declared on setup method in Test Class.
Sorry for any mistake or lack of more informations.
Thanks and best regards!

mockito.when is returning null value

In CrossSellOffersServiceAdapter class, this statement:
crossSellOffersConnectBDS.getBDSCustomerInfo(channelId, customerId, cinSuffix,
countryCode);
Should return the value as it is mocked. But it is returning null value in CrossSellOffersServiceAdapterTest class.
public class CrossSellOffersServiceAdapter implements CrossSellOffersService {
#Autowired
private CrossSellOffersConnectBDS crossSellOffersConnectBDS;
#Autowired
private CrossSellOffersConnectCMP crossSellOffersConnectCMP;
#Autowired
private BDSCustomerHoldings bdsCustomerHoldings;
private static final Logger LOGGER = LoggerFactory.getLogger(CrossSellOffersServiceAdapter.class);
#Override
public Offers getApplicableOffers(String channelId, String customerId, String cinSuffix, String countryCode,
String interactionPoint, String sessionId, Integer numberOfOffers) throws CrossSellOffersException {
bdsCustomerHoldings = crossSellOffersConnectBDS.getBDSCustomerInfo(channelId, customerId, cinSuffix,
countryCode);
CMPOffer cmpOffer = crossSellOffersConnectCMP.getCMPOffers(bdsCustomerHoldings, interactionPoint, sessionId,
numberOfOffers);
Offers offers = getOffers(cmpOffer);
return offers;
}
}
public class CrossSellOffersServiceAdapterTest {
#InjectMocks
private CrossSellOffersServiceAdapter crossSellOffersService;
#Mock
private CrossSellOffersConnectBDSAdapter crossSellOffersConnectBDS;
#Mock
private CrossSellOffersConnectCMPAdapter crossSellOffersConnectCMP;
#Mock
private RestTemplate restTemplate;
#Mock
OffersRequest offersRq;
#Mock
private BDSRequest bdsRequest ;
#Mock
private BDSCustomerHoldings bdsResponse;
#Test
public void getApplicableOffersTest() throws CrossSellOffersException {
Mockito.when(crossSellOffersConnectBDS.getBDSCustomerInfo("MBSG", "S9718016D", "00", "SG")).thenReturn(sampleBDSResponse());
Mockito.when(crossSellOffersConnectCMP.getCMPOffers(bdsResponse, "NEW_CC_ADDON", "IBOXS007", 1)).thenReturn(CrossSellOffersConnectCMPAdapterTest.sampleCMPOffer());
Offers offers = crossSellOffersService.getApplicableOffers("MBSG", "IBOXS007", "00", "SG","NEW_CC_ADDON", "S9718016D", 1);
assertNotNull(offers, "response is not null");
}
}

Think you are missing the mockito init:
import org.mockito.MockitoAnnotations;
#Before
public void setup() {
MockitoAnnotations.initMocks(this);
}