@RequestParam javax 验证 junit REST 控制器测试

Question

有没有办法在@RequestParams 上对 javax 验证进行 spring 控制器单元测试。

我在控制器中有一个 get 方法，它使用 @Size 验证请求参数的大小。

@RequestMapping(value = "/getData", method = RequestMethod.GET)
    public ResultgetData(

            @Size(min=2, max=3)
             @RequestParam String number)

有没有办法模拟 junit 测试大小验证器？我想验证大小为 <2 或 > 3 时返回的错误。

样本测试：

@RunWith(MockitoJUnitRunner.class) public class MyControllerTest {

private MockMvc mockMvc;

@InjectMocks
private MyController myControllerMock;


@Before
public void initTest() {
    mockMvc = MockMvcBuilders.standaloneSetup(customerInsuranceControllerMock).setControllerAdvice(exceptionHandler).build();
}

@Test
public void getEmptyData() throws Exception{



    mockMvc.perform(MockMvcRequestBuilders.get(
        "/getData?number={number}"
        , "")
        .andExpect(MockMvcResultMatchers.status().isBadRequest());  // This is failing. It returns a success as javax @Size is not triggered.When a empty string is passed , it should be bad request

}

我也试过 spring 跑步者，但似乎还是失败了。

谢谢

Answer 1

如果我对您的问题的理解正确，您可以将 @RunWith with SpringRunner and @WebMvcTest 与您的控制器和异常处理程序一起使用类。

由于您的问题没有显示您的控制器的外观，让我们考虑以下控制器，returns 给定名称的问候语：

@Data
public class Greeting {
    private String content;
}

@Validated
@RestController
public class GreetingController {

    @GetMapping(path = "/greeting", produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Greeting> getGreeting(
                @RequestParam @Size(min = 2, max = 10) String name) {

        Greeting greeting = new Greeting();
        greeting.setContent("Hello " + name + "!");

        return ResponseEntity.ok(greeting);
    }
}

现在让我们考虑 ConstraintViolationException 的异常处理程序，当某些验证失败时将抛出该异常处理程序：

@Data
public class ApiError {
    private String message;
    private HttpStatus status;
    private Object details;
}

@Data
public class InvalidValue {
    private String name;
    private Object value;
    private String message;
}

@ControllerAdvice
public class WebApiExceptionHandler {

    @ExceptionHandler({ConstraintViolationException.class})
    public ResponseEntity<Object> handleConstraintViolation(ConstraintViolationException ex,
                                                            WebRequest request) {

        List<InvalidValue> invalidValues = ex.getConstraintViolations()
                .stream()
                .map(this::toInvalidValue)
                .collect(toList());

        ApiError apiError = new ApiError();
        apiError.setMessage("Validation error");
        apiError.setStatus(HttpStatus.BAD_REQUEST);
        apiError.setDetails(invalidValues);

        return new ResponseEntity<>(apiError, new HttpHeaders(), apiError.getStatus());
    }

    private InvalidValue toInvalidValue(ConstraintViolation violation) {
        InvalidValue invalidValue = new InvalidValue();
        invalidValue.setName(violation.getPropertyPath().toString());
        invalidValue.setValue(violation.getInvalidValue());
        invalidValue.setMessage(violation.getMessage());
        return invalidValue;
    }
}

有了这个，您可以编写如下所示的测试和期望：

@RunWith(SpringRunner.class)
@WebMvcTest({GreetingController.class, WebApiExceptionHandler.class})
public class GreetingControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @Test
    @SneakyThrows
    public void getGreeting_shouldReturn200_whenNameIsValid() {

        mockMvc.perform(
                get("/greeting")
                        .param("name", "foo")
                        .accept(MediaType.APPLICATION_JSON))
                .andDo(print())
                .andExpect(status().isOk())
                .andExpect(content().contentTypeCompatibleWith(MediaType.APPLICATION_JSON))

                .andExpect(jsonPath("$.*", hasSize(1)))
                .andExpect(jsonPath("$.content").value("Hello foo!"));
    }

    @Test
    @SneakyThrows
    public void getGreeting_shouldReturn400_whenNameIsInvalid() {

        mockMvc.perform(get("/greeting").param("name", "_"))
                .andDo(print())
                .andExpect(status().isBadRequest())
                .andExpect(content().contentTypeCompatibleWith(MediaType.APPLICATION_JSON))

                .andExpect(jsonPath("$.*", hasSize(3)))
                .andExpect(jsonPath("$.message").value("Validation error"))
                .andExpect(jsonPath("$.status").value("BAD_REQUEST"))
                .andExpect(jsonPath("$.details", hasSize(1)))

                .andExpect(jsonPath("$.details[0].*", hasSize(3)))
                .andExpect(jsonPath("$.details[0].name", is("getGreeting.name")))
                .andExpect(jsonPath("$.details[0].value", is("_")))
                .andExpect(jsonPath("$.details[0].message", is("size must be between 2 and 10")));
    }
}

Answer 2

你有2个问题， 1、需要用@Length来验证String的长度，@Size是验证集合中的项数，比如List。如果您说它必须是 2 或 3 的整数，那么您需要 @Min(2) @Max(3)。 2. 你的controller必须注解@Validated.

@RequestParam javax 验证 junit REST 控制器测试

@RequestParam javax validation junit REST controller testing

rest

junit4

mockito