当 RestTemplate

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如何解决当 RestTemplate？

我尝试测试一个简单的 POST Rest 调用，但存在 NullPointerException。

我的 RestController：

@RestController
@requestMapPing("/v1/mail")
@Slf4j
public class EmailForWARDController {

    @autowired
    EmailForWARDConfig emailConfig;

    @autowired
    RestTemplate restTemplate;

    @PostMapPing("/forWARD")
    public ResponseEntity<String> setupEmailForWARD(@requestParam String fromEmail,@requestParam String toEmail,@requestParam String referencEID) {
        log.info("Email ForWARD: from=" + fromEmail + " to=" + toEmail + " reference=" + referencEID);
        String uri = emailConfig.getUrl() + "forWARD";
        JsONObject JsonObject = new JsONObject();
        JsonObject.put("from",fromEmail);
        JsonObject.put("to",toEmail);
        JsonObject.put("clIEntID",referencEID);
        httpentity<String> httpentity = new httpentity<>(JsonObject.toJsONString());
        ResponseEntity<String> response = restTemplate.postForEntity(uri,httpentity,String.class);
        System.out.println(responsE); // -> this is null at UNIT Test
        if (response.getbody() == null) {
            log.error("No response for call!");
            return new ResponseEntity<>("Problem!",httpStatus.INTERNAL_SERVER_ERROR);
        }
        return new ResponseEntity<>(response.getbody(),response.getStatusCode());

    }

}

我的单元测试：

@RunWith(mockitoJUnitRunner.class)
@SpringBoottest(classes = EmailForWARD.class,webEnvironment = SpringBoottest.WebEnvironment.defineD_PORT)
public class serviCETest {

    @Injectmocks
    EmailForWARDController emailForWARDController;

    @mock
    RestTemplate restTemplate;

    @mock
    EmailForWARDConfig emailConfig;

    @Before
    public voID setup() {

    }

    @Test
    public voID test_forWARD_ok() {
        assertNotNull(restTemplatE);
        assertNotNull(emailForWARDController);
//        System.out.println(mockito.verify(restTemplatE).postForEntity(any(),any(),any()));
        mockito.when(restTemplate.postForEntity(any(),any())).thenReturn(new ResponseEntity<>("done",httpStatus.OK));
        ResponseEntity<String> responseEntity = emailForWARDController.setupEmailForWARD("test","test","test");
        assertNotNull(responseEntity);
        assertNotNull(responseEntity.getStatusCode());
        assertNotNull(responseEntity.getbody());
        assertEquals(responseEntity.getbody(),"Done");
        assertEquals(responseEntity.getStatusCode(),httpStatus.OK);
    }


}

由于以下错误，此测试失败：NullPointerException，正是响应 ResponseEntity 对象为空。

验证输出显示：

Wanted but not invoked:
restTemplate.postForEntity(
    <any>,<any>,<any>
);
-> at xx.xxx.ms.oauth2.serviCETest.test_forWARD_ok(serviCETest.java:42)
Actually,there were zero interactions with this mock.

任何想法为什么响应为空？我为测试使用了正确的注释，因此应该注入模拟。也许我在这里遗漏了一些重要的东西，因为如果我删除 @mock EmailForWARDConfig emailConfig; 这个对象在 RestController 中为空。 我觉得我忘记了一些东西，但我想不通。

解决方法

mockito.when(restTemplate.postForEntity(any(),any(),any())).thenReturn(new ResponseEntity<>("done",httpStatus.OK));

mockito.when(restTemplate.postForEntity(anyString(),any(Class.class))).thenReturn(new ResponseEntity<>("done",httpStatus.OK));

@ExtendWith(mockitoExtension.class)
public class TESTControllerTest {

    @Injectmocks
    TESTController emailForWARDController;
    @mock
    RestTemplate restTemplate;

    @Before
    public void setup() {

    }

    @Test
    public void test_forWARD_ok() {
        assertNotNull(restTemplatE);
        assertNotNull(emailForWARDController);
//        System.out.println(mockito.verify(restTemplatE).postForEntity(any(),any()));
        mockito.when(restTemplate.postForEntity(anyString(),httpStatus.OK));
        ResponseEntity<String> responseEntity = emailForWARDController.setupEmailForWARD("test","test","test");
        assertNotNull(responseEntity);
        assertNotNull(responseEntity.getStatusCode());
        assertNotNull(responseEntity.getBody());
        assertEquals(responseEntity.getBody(),"done");
        assertEquals(responseEntity.getStatusCode(),httpStatus.OK);
    }
}

    @mock
    RestTemplate restTemplate;

    @Injectmocks
    TESTController emailForWARDController;

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