quarkus-tdd

Quarkus TDD 工作流程

面向 Quarkus 3.x 服务的 TDD 指导，覆盖率达 80% 以上（单元测试 + 集成测试）。专为使用 Apache Camel 的事件驱动架构优化。

使用时机

• 新功能或 REST 端点
• Bug 修复或重构
• 添加数据访问逻辑、安全规则或响应式流
• 测试 Apache Camel 路由和事件处理器
• 使用 RabbitMQ 测试事件驱动服务
• 测试条件流逻辑
• 验证 CompletableFuture 异步操作
• 测试 LogContext 传播

工作流程

1. 先编写测试（它们应该失败）
2. 实现最小化代码以通过测试
3. 在测试通过后重构
4. 使用 JaCoCo 强制执行覆盖率（80% 以上目标）

使用 @Nested 组织进行单元测试

遵循以下结构化的方法，编写全面且可读的测试：

@ExtendWith(MockitoExtension.class)
@DisplayName("OrderService 单元测试")
class OrderServiceTest {

  @Mock
  private OrderRepository orderRepository;

  @Mock
  private EventService eventService;

  @Mock
  private FulfillmentPublisher fulfillmentPublisher;

  @InjectMocks
  private OrderService orderService;

  private CreateOrderCommand validCommand;

  @BeforeEach
  void setUp() {
    validCommand = new CreateOrderCommand(
        "customer-123",
        List.of(new OrderLine("sku-123", 2))
    );
  }

  @Nested
  @DisplayName("createOrder 测试")
  class CreateOrder {

    @Test
    @DisplayName("应持久化订单并发布履约事件")
    void givenValidCommand_whenCreateOrder_thenPersistsAndPublishes() {
      // 准备
      doNothing().when(orderRepository).persist(any(Order.class));

      // 执行
      OrderReceipt receipt = orderService.createOrder(validCommand);

      // 断言
      assertThat(receipt).isNotNull();
      assertThat(receipt.customerId()).isEqualTo("customer-123");
      verify(orderRepository).persist(any(Order.class));
      verify(fulfillmentPublisher).publishAsync(receipt);
      verify(eventService).createSuccessEvent(receipt, "ORDER_CREATED");
    }

    @Test
    @DisplayName("应拒绝缺少客户 ID 的请求")
    void givenMissingCustomerId_whenCreateOrder_thenThrowsBadRequest() {
      // 准备
      CreateOrderCommand invalid = new CreateOrderCommand("", validCommand.lines());

      // 执行与断言
      WebApplicationException exception = assertThrows(
          WebApplicationException.class,
          () -> orderService.createOrder(invalid)
      );

      assertThat(exception.getResponse().getStatus()).isEqualTo(400);
      verify(orderRepository, never()).persist(any(Order.class));
      verify(fulfillmentPublisher, never()).publishAsync(any());
    }

    @Test
    @DisplayName("持久化失败时应记录错误事件")
    void givenPersistenceFailure_whenCreateOrder_thenRecordsErrorEvent() {
      // 准备
      doThrow(new PersistenceException("database unavailable"))
          .when(orderRepository).persist(any(Order.class));

      // 执行与断言
      PersistenceException exception = assertThrows(
          PersistenceException.class,
          () -> orderService.createOrder(validCommand)
      );

      assertThat(exception.getMessage()).contains("database unavailable");
      verify(eventService).createErrorEvent(
          eq(validCommand),
          eq("ORDER_CREATE_FAILED"),
          contains("database unavailable")
      );
      verify(fulfillmentPublisher, never()).publishAsync(any());
    }

    @Test
    @DisplayName("应拒绝空命令")
    void givenNullCommand_whenCreateOrder_thenThrowsNullPointerException() {
      // 执行与断言
      assertThrows(
          NullPointerException.class,
          () -> orderService.createOrder(null)
      );

      verify(orderRepository, never()).persist(any(Order.class));
    }
  }
}

关键测试模式

1. @Nested 类：按测试方法分组
2. @DisplayName：为测试报告提供可读的测试描述
3. 命名约定：givenX_whenY_thenZ 确保清晰
4. AAA 模式：显式的 // 准备、// 执行、// 断言 注释
5. @BeforeEach：设置通用测试数据以减少重复
6. assertDoesNotThrow：测试成功场景，无需捕获异常
7. assertThrows：使用 AssertJ 测试异常场景并验证消息
8. 全面覆盖：测试快乐路径、空输入、边界情况、异常
9. 验证交互：使用 Mockito verify() 确保方法被正确调用
10. 绝不验证：使用 never() 确保在错误场景中方法未被调用

测试 Camel 路由

@QuarkusTest
@DisplayName("业务规则 Camel 路由测试")
class BusinessRulesRouteTest {

  @Inject
  CamelContext camelContext;

  @Inject
  ProducerTemplate producerTemplate;

  @InjectMock
  EventService eventService;

  @InjectMock
  DocumentValidator documentValidator;

  private BusinessRulesPayload testPayload;

  @BeforeEach
  void setUp() {
    // 准备 - 测试数据
    testPayload = new BusinessRulesPayload();
    testPayload.setDocumentId(1L);
    testPayload.setFlowProfile(FlowProfile.BASIC);
  }

  @Nested
  @DisplayName("business-rules-publisher 路由测试")
  class BusinessRulesPublisher {

    @Test
    @DisplayName("应成功将消息发布到 RabbitMQ")
    void givenValidPayload_whenPublish_thenMessageSentToQueue() throws Exception {
      // 准备
      MockEndpoint mockRabbitMQ = camelContext.getEndpoint("mock:rabbitmq", MockEndpoint.class);
      mockRabbitMQ.expectedMessageCount(1);

      // 为测试替换真实端点
      camelContext.getRouteController().stopRoute("business-rules-publisher");
      AdviceWith.adviceWith(camelContext, "business-rules-publisher", advice -> {
        advice.replaceFromWith("direct:business-rules-publisher");
        advice.weaveByToString(".*spring-rabbitmq.*").replace().to("mock:rabbitmq");
      });
      camelContext.getRouteController().startRoute("business-rules-publisher");

      // 执行
      producerTemplate.sendBody("direct:business-rules-publisher", testPayload);

      // 断言 — body 是 .marshal().json(JsonLibrary.Jackson) 后的 JSON 字符串
      mockRabbitMQ.assertIsSatisfied(5000);

      assertThat(mockRabbitMQ.getExchanges()).hasSize(1);
      String body = mockRabbitMQ.getExchanges().get(0).getIn().getBody(String.class);
      assertThat(body).contains("\"documentId\":1");
    }

    @Test
    @DisplayName("应处理 JSON 序列化")
    void givenPayload_whenPublish_thenMarshalledToJson() throws Exception {
      // 准备
      MockEndpoint mockMarshal = new MockEndpoint("mock:marshal");
      camelContext.addEndpoint("mock:marshal", mockMarshal);
      mockMarshal.expectedMessageCount(1);

      camelContext.getRouteController().stopRoute("business-rules-publisher");
      AdviceWith.adviceWith(camelContext, "business-rules-publisher", advice -> {
        advice.weaveAddLast().to("mock:marshal");
      });
      camelContext.getRouteController().startRoute("business-rules-publisher");

      // 执行
      producerTemplate.sendBody("direct:business-rules-publisher", testPayload);

      // 断言
      mockMarshal.assertIsSatisfied(5000);

      String body = mockMarshal.getExchanges().get(0).getIn().getBody(String.class);
      assertThat(body).contains("\"documentId\":1");
      assertThat(body).contains("\"flowProfile\":\"BASIC\"");
    }
  }

  @Nested
  @DisplayName("document-processing 路由测试")
  class DocumentProcessing {

    @Test
    @DisplayName("应路由发票到正确的处理器")
    void givenInvoiceType_whenProcess_thenRoutesToInvoiceProcessor() throws Exception {
      // 准备
      MockEndpoint mockInvoice = camelContext.getEndpoint("mock:invoice", MockEndpoint.class);
      mockInvoice.expectedMessageCount(1);

      camelContext.getRouteController().stopRoute("document-processing");
      AdviceWith.adviceWith(camelContext, "document-processing", advice -> {
        advice.weaveByToString(".*direct:process-invoice.*").replace().to("mock:invoice");
      });
      camelContext.getRouteController().startRoute("document-processing");

      // 执行
      producerTemplate.sendBodyAndHeader("direct:process-document",
          testPayload, "documentType", "INVOICE");

      // 断言
      mockInvoice.assertIsSatisfied(5000);
    }

    @Test
    @DisplayName("应优雅处理验证错误")
    void givenValidationError_whenProcess_thenRoutesToErrorHandler() throws Exception {
      // 准备
      MockEndpoint mockError = camelContext.getEndpoint("mock:error", MockEndpoint.class);
      mockError.expectedMessageCount(1);

      camelContext.getRouteController().stopRoute("document-processing");
      AdviceWith.adviceWith(camelContext, "document-processing", advice -> {
        advice.weaveByToString(".*direct:validation-error-handler.*")
            .replace().to("mock:error");
      });
      camelContext.getRouteController().startRoute("document-processing");

      // Mock 验证器 bean 抛出异常
      when(documentValidator.validate(any())).thenThrow(new ValidationException("Invalid document"));

      // 执行
      producerTemplate.sendBody("direct:process-document", testPayload);

      // 断言
      mockError.assertIsSatisfied(5000);

      Exception exception = mockError.getExchanges().get(0).getException();
      assertThat(exception).isInstanceOf(ValidationException.class);
      assertThat(exception.getMessage()).contains("Invalid document");
    }
  }
}

测试事件服务

@ExtendWith(MockitoExtension.class)
@DisplayName("EventService 单元测试")
class EventServiceTest {

  @Mock
  private EventRepository eventRepository;

  @Mock
  private ObjectMapper objectMapper;

  @InjectMocks
  private EventService eventService;

  private BusinessRulesPayload testPayload;

  @BeforeEach
  void setUp() {
    // 准备
    testPayload = new BusinessRulesPayload();
    testPayload.setDocumentId(1L);
  }

  @Nested
  @DisplayName("createSuccessEvent 测试")
  class CreateSuccessEvent {

    @Test
    @DisplayName("应使用正确属性创建成功事件")
    void givenValidPayload_whenCreateSuccessEvent_thenEventPersisted() throws Exception {
      // 准备
      when(objectMapper.writeValueAsString(testPayload)).thenReturn("{\"documentId\":1}");

      // 执行
      assertDoesNotThrow(() ->
          eventService.createSuccessEvent(testPayload, "DOCUMENT_PROCESSED"));

      // 断言
      verify(eventRepository).persist(argThat(event ->
          event.getType().equals("DOCUMENT_PROCESSED") &&
          event.getStatus() == EventStatus.SUCCESS &&
          event.getPayload().equals("{\"documentId\":1}") &&
          event.getTimestamp() != null
      ));
    }

    @Test
    @DisplayName("当 payload 为空时应抛出异常")
    void givenNullPayload_whenCreateSuccessEvent_thenThrowsException() {
      // 准备
      Object nullPayload = null;

      // 执行与断言
      NullPointerException exception = assertThrows(
          NullPointerException.class,
          () -> eventService.createSuccessEvent(nullPayload, "EVENT_TYPE")
      );

      assertThat(exception.getMessage()).isEqualTo("Payload cannot be null");
      verify(eventRepository, never()).persist(any());
    }
  }

  @Nested
  @DisplayName("createErrorEvent 测试")
  class CreateErrorEvent {

    @Test
    @DisplayName("应创建包含错误消息的错误事件")
    void givenError_whenCreateErrorEvent_thenEventPersistedWithMessage() throws Exception {
      // 准备
      String errorMessage = "Processing failed";
      when(objectMapper.writeValueAsString(testPayload)).thenReturn("{\"documentId\":1}");

      // 执行
      assertDoesNotThrow(() ->
          eventService.createErrorEvent(testPayload, "PROCESSING_ERROR", errorMessage));

      // 断言
      verify(eventRepository).persist(argThat(event ->
          event.getType().equals("PROCESSING_ERROR") &&
          event.getStatus() == EventStatus.ERROR &&
          event.getErrorMessage().equals(errorMessage) &&
          event.getPayload().equals("{\"documentId\":1}")
      ));
    }

    @ParameterizedTest
    @DisplayName("应拒绝无效的错误消息")
    @ValueSource(strings = {"", " "})
    void givenBlankErrorMessage_whenCreateErrorEvent_thenThrowsException(String blankMessage) {
      // 执行与断言
      IllegalArgumentException exception = assertThrows(
          IllegalArgumentException.class,
          () -> eventService.createErrorEvent(testPayload, "ERROR", blankMessage)
      );

      assertThat(exception.getMessage()).contains("Error message cannot be blank");
    }
  }
}

测试 CompletableFuture

@ExtendWith(MockitoExtension.class)
@DisplayName("FileStorageService 单元测试")
class FileStorageServiceTest {

  @Mock
  private S3Client s3Client;

  @Mock
  private ExecutorService executorService;

  @InjectMocks
  private FileStorageService fileStorageService;

  private InputStream testInputStream;
  private LogContext testLogContext;

  @BeforeEach
  void setUp() {
    // 准备
    testInputStream = new ByteArrayInputStream("test content".getBytes());
    testLogContext = new LogContext();
    testLogContext.put("traceId", "trace-123");
  }

  @Nested
  @DisplayName("uploadOriginalFile 测试")
  class UploadOriginalFile {

    @Test
    @DisplayName("应成功上传文件并返回文档信息")
    void givenValidFile_whenUpload_thenReturnsDocumentInfo() throws Exception {
      // 准备
      doAnswer(invocation -> {
        ((Runnable) invocation.getArgument(0)).run();
        return null;
      }).when(executorService).execute(any(Runnable.class));

      when(s3Client.putObject(any(PutObjectRequest.class), any(RequestBody.class)))
          .thenReturn(PutObjectResponse.builder().build());

      // 执行
      CompletableFuture<StoredDocumentInfo> future

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