This is the first time I'm trying to write Integration Tests with the spring framework test. The controller returns a proper response in Postman but MvcResult returns "application/json;charset=UTF-8" as a response. I tried different solutions present on Internet but nothing seems to work. Please, help me with this.
I want to extract the key-value pair from the JSON response.
spring test = 5.1.8.RELEASE
Controller
#RestController
public class CustAuController {
#RequestMapping(value = "/retrieve_something", method = RequestMethod.GET)
retrieveSomething(){
}
}
Postman Response
{
"total_count" : 3,
"data" : {
"list" : [
{
...
}
]
}
}
Test Class
#SpringBootApplication
#SpringBootTest(classes = ServiceApplication.class)
#TestInstance(TestInstance.Lifecycle.PER_CLASS)
#TestMethodOrder(MethodOrderer.OrderAnnotation.class)
class ControllerTest {
#Autowired
WebApplicationContext webApplicationContext;
MockMvc mockMvc;
public static String asJsonString(final Object obj) {
try {
final ObjectMapper mapper = new ObjectMapper();
return mapper.writeValueAsString(obj);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
#BeforeAll
void setMockMvc() {
mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
}
#Test
#DisplayName("Retrieve Something")
#Order(1)
void testRetrieveSomething() throws Exception{
MvcResult result = mockMvc.perform(MockMvcRequestBuilders.get(
"/retrieve_something"))
.andExpect(status().isOk()).andReturn();
System.out.println(
result.getResponse().getContentType()); // returns application/json;charset=UTF-8
}
}
Change in the last line getContentType() to getContentAsString()
Related
I am new to JUnit and Mockito. Here I am trying to mock the rest template call and return a response entity. But it throws me a Null pointer Exception. I am not able to figure out what's wrong with the mocking. Can anyone guide me where I am doing wrong?
JUnit5 Unit test cases
class MyTest {
#InjectMocks
private MyService service;
#Mock
private RestTemplate template;
#BeforeEach
void setUp(){
MockitoAnnotations.initMocks(this);
}
private ResponseEntity<String> generateResponse(String body, HttpStatus http) {
return new ResponseEntity<>(body, http);
}
#Test
public void publishEventsuccessResponseTest() {
when(template.postForEntity(ArgumentMatchers.anyString(), ArgumentMatchers.any(),
ArgumentMatchers.<Class<String>>any())).thenReturn(generateResponse("uuid",
HttpStatus.OK));
String result = service.sentData("data");
Assertions.assertTrue("uuid".equals(result));
}
}
Service
class MyService {
public String sentData(String data) {
String jsonResp = "";
ResponseEntity<String> response;
try {
HttpEntity<String> requestBody = new HttpEntity<String>(data, headers);
response = restTemplate.postForEntity("url", requestBody, String.class);
} catch (Exception ex) {}
System.out.println(response); //value : Null
if (response.getStatusCodeValue() == 200) { // Null pointer exception
jsonResp = response.getBody();
}
return jsonResp;
}
}
Change the #BeforeEach to #Before of jUnit4 and add public void setUp()
Your test should be green!
So, I have this unit test that I need to run.
#MockBean
private AppServiceImpl appService;
#Test
public void shouldThrowExceptionWhenAppIdIsNull() throws Exception {
File inputFile = this.getJsonFile();
RequestDto requestDto = objectMapper.readValue(inputFile.getAbsoluteFile(),
RequestDto.class);
AppData appData = requestDto.getAppData();
appData.setAppId(null);
requestDto.setAppData(appData);
when(appService.getUrl(requestDto, "header")).thenThrow(new RequestNotValidException());
String payload = objectMapper.writeValueAsString(requestDto);
this.mockMvc.perform(post(Base_URL + "app/requesturl")
.contentType(contentType).content(payload).header(this.Header, "header"))
.andExpect(status().is4xxClientError());
}
Interface for service:
SO when I run this test, it throws an exception and doesn't actually assert the test here.
I have added #ResponseStatus(HttpStatus.BAD_REQUEST) on top of RequestNotValidException and it extends RunTimeException
And in the second test case, I get empty response. I tried this API vis Postman and I get the response. Everything works fine there.
#Test
public void getCardRegistration() throws Exception {
File inputFile = this.getJsonFile();
RequestDto requestDto = objectMapper.readValue(inputFile.getAbsoluteFile(), RequestDto.class);
ResponseDto responseDto = new ResponseDto();
responseDto.setURL(AuthUtils.randomStringToken(35));
given(appService.getRegistrationUrl(requestDto, "header")).willReturn(responseDto);
String payload = objectMapper.writeValueAsString(requestDto);
MvcResult mvcResult = this.mockMvc.perform(post(Base_URL + "app/requesturl")
.contentType(contentType).content(payload).header(this.Header, "header"))
.andReturn();
String contentAsString = mvcResult.getResponse().getContentAsString();
}
Controller content:
#Autowired
IAppService appService;
#RequestMapping(value = "/app/requesturl", method = RequestMethod.POST)
public ResponseDto getCardsRegistration(#RequestBody #Valid RequestDto requestDto, #RequestHeader(value="X-App-Name", required = true) String header) throws RequestNotValidException, JsonProcessingException {
log.info("Request received in controller: "+ mapper.writeValueAsString(cardRegistrationRequestDto));
log.info("Header value: "+ header);
return this.appService.getRegistrationUrl(requestDto, header);
}
Test Class:
#RunWith(SpringRunner.class)
#SpringBootTest
#AutoConfigureMockMvc
public class AppRestControllerTest {
protected String Base_URL = "/app";
protected String Header = "X-App-Name";
protected MediaType contentType = new MediaType(MediaType.APPLICATION_JSON.getType(),
MediaType.APPLICATION_JSON.getSubtype(),
Charset.forName("utf8"));
#Autowired
protected MockMvc mockMvc;
protected ObjectMapper objectMapper = new ObjectMapper();
#MockBean
private AppServiceImpl appService;
#Mock
private AppRegistrationRepository appRegistrationRepository;
#Before
public void setUp() throws Exception {
MapperFacade mapperFacade = new DefaultMapperFactory.Builder().build().getMapperFacade();
appService = new AppServiceImpl(appRegistrationRepository, mapperFacade);
}
What did I miss here?
Try to use
#RunWith(SpringRunner.class)
#WebMvcTest(YourController.class)
public class AppRestControllerTest {
Or
#RunWith(SpringRunner.class)
#SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK)
#AutoConfigureMockMvc
public class AppRestControllerTest {
In your tests
I am trying to test a basic controller:
#Autowired
DAOInterface db;
#RequestMapping(value = "/postdb", method = RequestMethod.GET)
#ResponseBody
public String postdb(
#RequestParam(value = "id", required = true) String id
) {
db.addEntry(id);
return "Added " + id + ".";
}
This url works as when I access it, it adds it to a db and I get the string output as a response.
I am trying to create a simple unit test for it:
#Autowired
MockMvc mockMvc;
#MockBean
DAOInterface daoInterface;
#Test
public void shouldReturnA200() throws Exception {
mockMvc.perform(get("/postdb?id=3"))
.andExpect(status().isOk());
}
But instead I get the following
MockHttpServletRequest:
HTTP Method = GET
Request URI = /postdb
Parameters = {id=[3]}
Headers = {}
Handler:
Type = org.springframework.web.servlet.resource.ResourceHttpRequestHandler
Async:
Async started = false
Async result = null
Resolved Exception:
Type = null
ModelAndView:
View name = null
View = null
Model = null
FlashMap:
Attributes = null
MockHttpServletResponse:
Status = 404
Error message = null
Headers = {}
Content type = null
Body =
Forwarded URL = null
Redirected URL = null
Cookies = []
java.lang.AssertionError: Status
Expected :200
Actual :404
Not sure why I it's working whenever I try and access it but fails when running this test. I don't see any issues. Might it be because I'm not using any headers or a formal response body/view and rather just outputting a String?
EDIT = It works when I add
.contextPath("/postdb")).. not sure if that's the correct way but when I write another test and dont include any request paramters, that test gives a 200 instead of a 400 or 404....
#Autowired
DAOInterface db;
#RequestMapping(value = "/postdb", method = RequestMethod.GET)
public ResponseEntity<String> postdb(#RequestParam(required = true) String id) {
db.addEntry(id);
return new ResponseEntity<>("Added " + id + ".", HttpStatus.OK);
}
Test:
#Test
public void shouldReturnA200() throws Exception {
mockMvc.perform(get("/postdb?id=3")
.contentType(MediaType.APPLICATION_JSON)
.accept(MediaType.APPLICATION_JSON))
.andExpect(status().isOk());
}
Below is working fine for me
public class FirstWebController {
#RequestMapping(value = "/postdb", method = RequestMethod.GET)
#ResponseBody
public String postdb(#RequestParam(value = "id", required = true) String id) {
System.out.println("idddddddddddd "+id);
return "Added " + id + ".";
}
}
Test class is
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration
public class FirstWebControllerTest {
#Configuration
static class FirstWebControllerTestConfiguration {
#Bean
public FirstWebController firstWebController() {
return new FirstWebController();
}
}
#Autowired
private FirstWebController firstWebController;
private MockMvc mockMvc;
#Before
public void setup() {
mockMvc = standaloneSetup(firstWebController).build();
}
#Test
public void shouldReturnA200() throws Exception {
mockMvc.perform(get("/postdb?id=3")).andExpect(status().isOk());
}
}
Try adding query parameter as below:
#Test
public void shouldReturnA200() throws Exception {
mockMvc.perform(get("/postdb).param("id", "3"))
.andExpect(status().isOk());
}
Working on a spring boot based Rest project I have a controller like this
which calls service and service layer call dao layer. Now I am writing unit test code for controllers. when I run this the error says
java.lang.AssertionError: expected:<201> but was:<415>
I don't know where I am doing wrong:
public class CustomerController {
private static final Logger LOGGER = LogManager.getLogger(CustomerController.class);
#Autowired
private CustomerServices customerServices;
#Autowired
private Messages MESSAGES;
#Autowired
private LMSAuthenticationService authServices;
#RequestMapping(value = "/CreateCustomer", method = RequestMethod.POST)
public Status createCustomer(#RequestBody #Valid Customer customer, BindingResult bindingResult) {
LOGGER.info("createCustomer call is initiated");
if (bindingResult.hasErrors()) {
throw new BusinessException(bindingResult);
}
Status status = new Status();
try {
int rows = customerServices.create(customer);
if (rows > 0) {
status.setCode(ErrorCodeConstant.ERROR_CODE_SUCCESS);
status.setMessage(MESSAGES.CUSTOMER_CREATED_SUCCESSFULLY);
} else {
status.setCode(ErrorCodeConstant.ERROR_CODE_FAILED);
status.setMessage(MESSAGES.CUSTOMER_CREATION_FAILED);
}
} catch (Exception e) {
LOGGER.info("Cannot Create the Customer:", e);
status.setCode(ErrorCodeConstant.ERROR_CODE_FAILED);
status.setMessage(MESSAGES.CUSTOMER_CREATION_FAILED);
}
return status;
}
}
The test for the CustomerController.
public class CustomerControllerTest extends ApplicationTest {
private static final Logger LOGGER = LogManager.getLogger(CustomerControllerTest.class);
#Autowired
private WebApplicationContext webApplicationContext;
private MockMvc mockMvc;
#MockBean
private CustomerController customerController;
#Before
public void setup() {
this.mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
}
Status status = new Status(200,"customer created successfully","success");
String customer = "{\"customerFullName\":\"trial8900\",\"customerPhoneNumber\": \"trial8900\", \"customerEmailID\": \"trial8900#g.com\",\"alternateNumber\": \"trial8900\",\"city\": \"trial8900\",\"address\":\"hsr\"}";
#Test
public void testCreateCustomer() throws Exception {
String URL = "http://localhost:8080/lms/customer/CreateCustomer";
Mockito.when(customerController.createCustomer(Mockito.any(Customer.class),(BindingResult) Mockito.any(Object.class))).thenReturn(status);
// execute
MvcResult result = mockMvc.perform(MockMvcRequestBuilders.post(URL)
.contentType(MediaType.APPLICATION_JSON_UTF8)
.accept(MediaType.APPLICATION_JSON_UTF8)
.content(TestUtils.convertObjectToJsonBytes(customer))).andReturn();
LOGGER.info(TestUtils.convertObjectToJsonBytes(customer));
// verify
MockHttpServletResponse response = result.getResponse();
LOGGER.info(response);
int status = result.getResponse().getStatus();
LOGGER.info(status);
assertEquals(HttpStatus.CREATED.value(), status);
}
}
HTTP status 415 is "Unsupported Media Type". Your endpoint should be marked with an #Consumes (and possibly also #Produces) annotation specifying what kinds of media types it expects from the client, and what kind of media type it returns to the client.
Since I see your test code exercising your production code with MediaType.APPLICATION_JSON_UTF8, you should probably mark your endpoint as consuming and producing APPLICATION_JSON_UTF8.
Then you also need to make sure that there is nothing terribly wrong going on in your error handling, because in the process of catching the exceptions generated by your production code and generating HTTP responses, your error handling code may be generating something different, e.g. generating an error status response with a payload containing an HTML-formatted error message, which would have a content-type of "text/html", which would not be understood by your test code which expects json.
Use the below base test class for your setUp and converting json to string and string to json
#RunWith(SpringJUnit4ClassRunner.class)
#SpringBootTest(classes = Main.class)
#WebAppConfiguration
public abstract class BaseTest {
protected MockMvc mvc;
#Autowired
WebApplicationContext webApplicationContext;
protected void setUp() {
mvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
}
protected String mapToJson(Object obj) throws JsonProcessingException {
ObjectMapper objectMapper = new ObjectMapper();
return objectMapper.writeValueAsString(obj);
}
protected <T> T mapFromJson(String json, Class<T> clazz)
throws JsonParseException, JsonMappingException, IOException {
ObjectMapper objectMapper = new ObjectMapper();
return objectMapper.readValue(json, clazz);
}
}
Also verify that your post call has happened or not check the below sample
Mockito.doNothing().when(customerServices).create(Mockito.any(Customer.class));
customerServices.create(customer);
Mockito.verify(customerServices, Mockito.times(1)).create(customer);
RequestBuilder requestBuilder = MockMvcRequestBuilders.post(URI)
.accept(MediaType.APPLICATION_JSON).content(inputInJson)
.contentType(MediaType.APPLICATION_JSON);
MvcResult mvcResult = mvc.perform(requestBuilder).andReturn();
MockHttpServletResponse response = mvcResult.getResponse();
assertEquals(HttpStatus.OK.value(), response.getStatus());
I have a controller:
#Controller
#RequestMapping(value = "/bookForm")
public class BookFormController {
#Autowired
private BookHttpRequestParser parser;
#Autowired
private BooksService booksService;
#RequestMapping(params = "add", method = RequestMethod.POST)
public String addBook(HttpServletRequest request) {
try {
Book newBook = parser.createBookFromRequest(request);
booksService.addBook(newBook);
} catch (InvalidTypedParametersException e) {
}
return "redirect:index.html";
}
This Controller has a method for adding book to DB. Method has #RequestMapping annotation with params = "add" value.
Im trying to set this params criteria to controller unit test method:
#Test
public void addBook() throws Exception{
HttpServletRequest request = mock(HttpServletRequest.class);
Book book = new Book();
when(parser.createBookFromRequest(request)).thenReturn(book);
mockMvc.perform(post("/bookForm", "add"))
.andExpect(status().isOk())
.andExpect(view().name("redirect:index.html"));
}
Where to specify this #ResuetsMapping params value?
This:
mockMvc.perform(post("/bookForm", "add"))
doesn't work at all.
The following should work.
mockMvc.perform(post("/bookForm?add="))
use RequestBuilder requestBuilders;
object to build your request
requestBuilders = MockMvcRequestBuilders.get("URL/{Pathvariable}","PathvariableValue")
.contentType(MediaType.APPLICATION_JSON)
.header("HeaderName", HeaderValue)
.param("ParameterName", "Value")
.param("ParameterName", "Value")
.accept(MediaType.APPLICATION_JSON);
and the perfrom
mockMvc.perform(requestBuilders)
.andDo(print())
.andExpect(status().isOk())
.andReturn();