Тест Джунит не пройден.Новое в модульном тестировании

Question

Написание модульного теста для моего метода службы Spring Boot, и я не могу его пройти. Я разработчик внешнего интерфейса, поэтому я не очень знаком с модульным тестированием в Java. MultipartFile - это то, что меня смущает больше всего, а также завершение всего теста Junit.

Junit4 с модульным тестом. Попробовал stackoverflow и Google для потенциальных исправлений.

Контрактное обслуживание

@Slf4j
@Service
public class ContractService {

    @Autowired
    public ContractRepository contractRepository;

    @Autowired
    public JdbcTemplate jdbcTemplate;

    @Autowired
    public UserSettingsService userSettingsService;

    @Autowired
    public ContractPermissionsService contractPermissionsService;

    @Autowired
    public OCRSubmissionService ocrSubmissionService;

    @Autowired
    public ContractDocumentStorageService contractDocumentStorageService;

    public Contract getContract(int contractID) {
       Contract contract = contractRepository.getOne(contractID);
       return contract;
    }

    //TODO: come back and reduce contractID / metaID to one ID.
    //TODO: add trigger in DB layer for coterminous
    // TODO: make sure isVisible defaults to false

    /*
    When adding a new contract, the following steps are taken:
    1. SQL transaction is begun
    2. The meta information is stored, and an ID is generated in SQL.
    3. The file is stored with the corresponding document ID.
    4. The meta information is updated with the document link.
    5. A login, submission, and logoff are made to KTA.
    6. As long as all these steps have completed, the transaction is completed
    7. Otherwise, the transaction is cancelled ad an error is thrown (controller returns 500)
     */
    @Transactional(rollbackFor=Exception.class)
    public Contract addNewContract(Contract contract, MultipartFile file) throws Exception {
        Contract newContract = this.contractRepository.save(contract);
        int ID = contract.getId();
        int fileID = this.contractDocumentStorageService.storeFile(file, ID);
        contract.setDocumentPathDesc(Integer.toString(fileID));
        this.addViewingPermissionsForSubmitter(contract);
        Boolean success = this.ocrSubmissionService.SubmitContractForOCR(file, contract.getId());
        if(success) {
            return this.contractRepository.saveAndFlush(newContract);
        } else {
            throw new OCRSubmissionFailureException("Error in OCR Submission");
        }
    }

Испытание по контракту

public class ContractServiceTest {

    ContractService contractServiceUnderTest;


    @Before
    public void setUp() {
        contractServiceUnderTest = new ContractService();
        contractServiceUnderTest.contractRepository = mock(ContractRepository.class);
        contractServiceUnderTest.jdbcTemplate = mock(JdbcTemplate.class);
        contractServiceUnderTest.userSettingsService = mock(UserSettingsService.class);
        contractServiceUnderTest.contractPermissionsService = mock(ContractPermissionsService.class);
        contractServiceUnderTest.ocrSubmissionService = mock(OCRSubmissionService.class);
        contractServiceUnderTest.contractDocumentStorageService = mock(ContractDocumentStorageService.class);
    }

    @Test
    public void testAddNewContract() throws Exception {
        // Setup
        final Contract contract = new Contract();
        final MultipartFile file = null;
        final Contract expectedResult = null;

        // Run the test
        final Contract result = contractServiceUnderTest.addNewContract(contract, file);

        // Verify the results
        assertEquals(expectedResult, result);
    }