java - 轴突测试：缺少上下文

Question

在 Axon-SpringBoot 应用程序中，我有一个在其某些命令处理程序中使用注入 DAO 的聚合。

例如：

@Aggregate
class MyAggregate {

    @CommandHandler
    public MyAggregate (CreateMyAggregateCommand command, @Autowired MyAggregateDao dao) {

          final SomeProperty = command.getSomePoprtery();

          if (dao.findBySomeProperty(someProperty) == null) {
               AggregateLifeCycle.apply(
                     new MyAggregateCreatedEvent(command.getIdentifier(),
                                                 someProperty);
          } else {
               // Don't create, already exits with some property
               // report ...
          }
    }

}

像这样的标准测试

@Test
void creationSucceeds () {

    aggregateTestFixture = new AggregateTestFixture<>(MyAggregate.class);

    final CreateMyAggregateCommand command = new CreateMyAggregateCommand(...);
    final MyAggregateCreatedEvent = new MyAggregateCreatedEvent(...);

    aggregateTestFixture
            .givenNoPriorActivity()
            .when(command)
            .expectEvents(event);

}

失败：

org.axonframework.test.FixtureExecutionException: No resource of type 
[com.xmpl.MyAggregateDao] has been registered. It is required 
for one of the handlers being executed.

如何提供测试实现？

Answer 1

解决方案 1：模拟

由于这是关于单元测试并且我的问题涉及数据库调用（外部服务），因此只要测试仅涉及孤立的聚合行为，模拟似乎就适用。

@Test
void creationSucceeds () {

    aggregateTestFixture = new AggregateTestFixture<>(MyAggregate.class);
    aggregateTestFixture.registerInjectableResource(
          Mockito.mock(MyAggregateDao.class));

}

解决方案 2：真实注入 (jUnit 5)

这个对我有用：

1. 从这个 github repo获取 Spring jUnit5 测试支持的小型库

2. 注释测试类：

   @SpringBootTest(classes = {SpringTestConfig.class}) 
   @ExtendWith(SpringExtension.class)
   public class MyAggregateTest {
   
       // ...        
   
   }
   

3. 将 application.properties 放在 src/test/resources

4. 编写 Spring Test Configuration 来启动一个功能齐全的 Spring 容器：

   @EnableAutoConfiguration
   public class SpringTestConfig {
   
        // Set up whatever you need
   
        @Bean
        @Autowired
        MyAggregateDao myDao (DataSource dataSource) {
   
            // ...
        }
   
   
        @Bean
        @Autowired
        EventStorageEngine eventStorageEngine () {
   
            return new InMemoryEventStorageEngine();
   
        }
   
   }
   

5. 直接注入你的测试，配置AggregateTestFixture

   private AggregateTestFixture<MyAggregate> aggregateTestFixture;
   
   @Autowired
   private MyAggregateDao myDao;
   
   @BeforeEach
   void beforeEach () {
   
       aggregateTestFixture = new AggregateTestFixture<>(MyAggregate.class);
   
       // We still need to register resources manually
       aggregateTestFixture.registerInjectableResource(myDao);
   
   }
   

使用 jUnit 4

设置一个使用 jUnit 4 启动 Spring 容器的测试配置有点不同，但那里有足够的文档。从这里开始