使用mockito模拟autowired字段在rest调用中会产生空响应

Question

我用的是弹簧靴和摩基托。我自动连接了一个类，即BDSRequest，在Junit测试类中，我使用了@Spy和@InjectMocks注释。但是在Junits中调用rest服务时，我得到的响应（bdsCustomerHoldings）为null，断言失败。如何在没有模拟rest模板（如mockito.when(restTemplate.PostForObject(constants.bds_rest_url,bdsRequest、BdsCustomerHoldings.class)的情况下测试此rest调用？

class BDSRestCall
{

    @Autowired
    BDSRequest bdsRequest;

    public BDSCustomerHoldings getBDSCustomerInfo(String channelId, String customerId, String cinSuffix,
            String countryCode) {

        logger.info("prepareRequestForBDS");
        Header header = new Header();
        header.setMsgId(RandomStringUtils.randomAlphanumeric(20));
        header.setChannelId(channelId);
        header.setCountryCode(countryCode);
        header.setRecordTimeStamp(DateTimeFormatter.ofPattern(Constants.DATE_FORMATTER).format(LocalDateTime.now()));

        TxnRequest txnRequest = new TxnRequest();
        txnRequest.setIdDoc(customerId);
        txnRequest.setIdDocSuffix(cinSuffix);
        txnRequest.setIdDoctype("");
        txnRequest.setInsurerCode("");

        bdsRequest.setHeader(header);
        bdsRequest.setTxnRequest(txnRequest);

        logger.info("BDS request " + bdsRequest);

        BDSCustomerHoldings bdsResponse = restTemplate.postForObject(Constants.BDS_REST_URL, bdsRequest,
                BDSCustomerHoldings.class);
        logger.info("BDS Response : " + bdsResponse);

        return bdsResponse;
    }
}

@RunWith(MockitoJUnitRunner.class)
class BDSRestCallTest
{
    @InjectMocks
    private BDSRestCall bdsRestCall;

    @Mock
    private RestTemplate restTemplate;

    @Spy
    private BDSRequest bdsRequest;



    @Test
        public void getBDSCustomerInfoExceptionTest() {
            BDSCustomerHoldings bdsCustomerHoldings = bdsRestCall.getBDSCustomerInfo("SG", "S9718016D",
                    "00", "SG");
            System.out.println("response is " + bdsCustomerHoldings);
            assertNotNull("response is not null", bdsCustomerHoldings);
        }

}

Answer 1

由于我们正在使用@RunWith(MockitoJUnitRunner.class)，那么我们应该使用如下所示的模拟restTemplate的响应

Mockito.when(restTemplate.postForObject(Mockito.anyString(), bdsRequest, BDSCustomerInsuranceHoldings.class)).thenReturn(sampleBDSCustomerInsuranceHoldings());

然后它会给出模拟响应。