我正在尝试测试验证，我有一个控制器

@RestController
@RequestMapping("/product")
@RequiredArgsConstructor
@CrossOrigin
public class ProductController {

private final ProductService productService;

@PreAuthorize("hasRole('ROLE_ADMIN')")
@PostMapping
public ProductResponse createProduct(@RequestBody @Valid ProductRequest request) {
    return productService.createProduct(request);
 }
}

服务

@Slf4j
@Service
@RequiredArgsConstructor
public class ProductServiceImpl implements ProductService {

private final ProductMapper productMapper;
private final ProductRepository productRepository;

@Override
@Transactional
public ProductResponse createProduct(ProductRequest productRequest) {
    Product product = productMapper.mapToEntity(productRequest);
    Product savedProduct = productRepository.save(product);
    log.info("New product saved. Id = {}", savedProduct.getId());
    return productMapper.mapToResponse(savedProduct);
}

}

带有控制器和服务的Spring验证注解的DTO

@Getter
@Setter
public class ProductRequest {

    @NotBlank(message = "{name.not-blank}")
    private String name;

    @Positive(message = "{amount.positive}")
    private Integer amount;

    @Positive(message = "{price.positive}")
    private Double price;
}

www.example.com文件中的消息message.properties：

name.not-blank=Name field is required

在RestExceptionHandler中处理异常：

@ExceptionHandler(MethodArgumentNotValidException.class)
protected ResponseEntity<ExceptionResponse> handleMethodArgumentNotValidException(MethodArgumentNotValidException ex) {
    String message = ex.getAllErrors().stream()
            .map(DefaultMessageSourceResolvable::getDefaultMessage)
            .collect(Collectors.joining(", "));
    ExceptionResponse response = new ExceptionResponse(message);
    log.error(message);
    return new ResponseEntity<>(response, HttpStatus.BAD_REQUEST);
}

如果我启动应用程序，但没有填写ProductRequest的name字段，则会根据我的www.example.com文件收到消息messages.properties：“Name field is required”enter image description here
但是，如果我创建测试，并且在创建ProductRequest时没有填充相同的字段：

public class ProductServiceTest {

private final ProductRepository productRepository = mock(ProductRepository.class);
private final ProductMapper productMapper = new ProductMapperImpl();
private final ProductServiceImpl productService =
        new ProductServiceImpl(
                productMapper,
                productRepository);

@Test
void whenEmptyNameProduct() {
    var productRequest = buildProduct();
    var product = productMapper.mapToEntity(productRequest);
    when(productRepository.save(any())).thenReturn(product);
    var productResponse = productMapper.mapToResponse(product);
    MethodArgumentNotValidException thrown = assertThrows(
            MethodArgumentNotValidException.class,
            () -> productService.createProduct(productRequest));
    assertTrue(thrown.getMessage().contentEquals("Name field is required"));
}

private ProductRequest buildProduct() {
    ProductRequest request = new ProductRequest();
//        request.setName("");
    request.setAmount(0);
    request.setPrice(500.0);
    return request;
}

}

我从控制台收到消息：
org.opentest4j.AssertionFailedError:应引发org.springframework.web.bind.MethodArgumentNotValidException异常，但未引发任何异常。
enter image description here
我也尝试过从RestExceptionHandler中删除异常处理，然后启动应用程序，但在这种情况下，我得到了这样的消息：
已解决[org.springframework.web.bind.方法参数无效异常：验证公共com.guavapay.delivery.dto.response.ProductResponse com.guavapay.delivery.controller.ProductController.createProduct（com.guavapay.delivery.dto.request.ProductRequest）中的参数[0]失败：[对象'productRequest'中字段'name'上的字段错误：拒绝值[];代码[NotBlank.productRequest.name，NotBlank.name，非空白.java.lang.字符串，非空白];参数[org.springframework.context.support.默认消息源可解析：代码[productRequest.name，名称];参数[];默认消息[名称]];默认消息[名称字段为必填字段]] ]
enter image description here，其中包含方法参数无效异常。
我很困惑，我需要做什么来正确测试@NotBlank注解并获得MethodArgumentNotValidException以便在测试中Assert？
你能给我点建议吗？