Spring Boot不会抛出HttpMessageNotReadableException

如何解决Spring Boot不会抛出HttpMessageNotReadableException

有一个简单的loginController，它的loginRequest带有@RequestBody注释

@RestController
public class LoginController{
    @PostMapping("/login")
    public ResponseEntity<?> doLogin(@Valid @RequestBody LoginRequest loginRequest,BindingResult bindingResult){
    }
}
// ...

public class LoginRequest {

    @NotBlank(message = "Email/Phone Can not be empty")
    private String emailAddressOrPhoneNumber;

    @NotBlank(message = "Password Can not be empty")
    private String password;

    public LoginRequest() {
    }
    // getters and setters
}

我正在像这样通过WebMvcTest测试此代码：

@WebMvcTest(controllers = LoginController.class)
public class LoginControllerMvcTest {
    @Test
    public void test(){
        NewCustomerRequest invalidRequestType = // assume that there is a valid new customer object.
        MvcResult mvcResultForInvalidRequestType = mockmvc.perform("/login")
                .content(objectMapper.writeValueAsstring(invalidRequestType))
                .contentType("application/json"))
                .andReturn();
    }
}
// ...
public class NewCustomerRequest {
    @NotBlank(message = "Email can not be empty")
    @EmailValueValidation
    private String emailAddress;

    @PhoneNumberRegexValidation
    private String phoneNumber;

    @NotBlank(message = "Password can not be empty")
    @InvalidPasswordCharacterValidation
    private String password;

    @NotBlank(message = "Password verify can not be empty")
    @InvalidPasswordCharacterValidation
    private String passwordVerify;

我想看到的是春天抛出了HttpMessageNotReadableException，因为我试图用不同的json类型发出Login请求。

但是，使用以下值向控制器发送请求：

loginRequest.emailAddressOrPhoneNumber = null
loginRequest.passsword = "passwordFromNewCustomerRequest"

在这种情况下，如何强制Spring引发异常？