Styjun

i want to mock the request entity and response to test the method on the controller method, this code has been written by another developer and i am supposed to test it using mockito.i'm mocking the controller class

i am trying to mock the request entity value and the respionse entity value , but it's not working and i'm getting a reflection error when i'm trying to debug

 public class InquiryController {

private static final Logger log = 
 LoggerFactory.getLogger(InquiryController.class);

@Autowired
private InquiryProperties inquiryProperties;

@Autowired
private InquiryService inquiryService;


@Autowired
RestTemplate restTemplate;

public static int count = 0;


@Bean
private RestTemplate getRestTemplate() 
 return new RestTemplate();


 @PostMapping(value = "/endCustomer", produces = MediaType.APPLICATION_JSON_VALUE , consumes = 
 MediaType.APPLICATION_JSON_VALUE )
public ResponseEntity<List<EndCustomerDTO>> endCustomer(@RequestBody CustomerInfo customerInfo)
 throws IOException, JSONException URISyntaxException e) 
 log.error("InquiryController.endCustomer()" + e.getMessage());
 

 log.info("### END InquiryController.endCustomer() ===>");

 if (null == endCustomerDTOs) 
 return new ResponseEntity<List<EndCustomerDTO>>(new ArrayList<EndCustomerDTO>(), HttpStatus.OK);
 
 return new ResponseEntity<List<EndCustomerDTO>>(endCustomerDTOs, HttpStatus.OK);

It's because instance of RestTemplate is not injected through Spring IOC when you do the REST call. You need to declare the getRestTemplate method of in the component class which is scanned during application startup or in other words during component scan. Thus making restTemplate available for autowire.

Once you separate the config from the controller as @chrylis suggested, you proceed further like this.

You must be trying to mock the RequestEntity.post method. Note that it is a static method and is mocked a bit differently than the usual public instance methods. For this, you need to use PowerMockito as Mockito won't do.

add the dependency in pom like this:

<dependency>
 <groupId>org.powermock</groupId>
 <artifactId>powermock-module-junit4</artifactId>
 <version>1.6.5</version>
 <scope>test</scope>
</dependency>
<dependency>
 <groupId>org.powermock</groupId>
 <artifactId>powermock-api-mockito</artifactId>
 <version>1.6.5</version>
 <scope>test</scope>
</dependency>

then anotate the test class with @RunWith, and @PrepareForTest like so:

@RunWith(PowerMockRunner.class)
@PrepareForTest(RequestEntity.class)
public class TestClass 

and the mock the post method as so:

PowerMockito.mockStatic(RequestEntity.class); when(RequestEntity.post(any(URI.class))).thenReturn(getRequestEntityResponseBody());
private RequestEntity< CustomerInfo > getRequestEntityResponseBody()
 //code

UPDATE

CustomerInfo customerInfo = new CustomerInfo();
HttpHeaders responseHeaders = new HttpHeaders();
responseHeaders.set("MyResponseHeader", "MyValue");
RequestEntity<CustomerInfo> customerInfoRequestEntity = new ResponseEntity<CustomerInfo>(customerInfo, responseHeaders, HttpStatus.OK);
PowerMockito.mockStatic(RequestEntity.class);
when(RequestEntity.post(any(URI.class))).thenReturn(customerInfoRequestEntity);