Micronaut Test 模拟 bean 未能注入值

Question

我正在尝试测试一个依赖 bean 工作的类，我想模拟它。该 bean 需要一个字符串值，该值是使用 @ConfigurationProperties 从我的 application.yml 文件中接收的，这可能是问题所在，因为在同一测试类中模拟的其他 bean 工作得很好。正常运行应用程序也可以正常运行，因此该错误似乎与@MockBean 在某种程度上有关。

我有这个配置类，它从application.yml 获取值：

@Data
@ConfigurationProperties("some_api")
public class SomeApiDaoConfig {
    private String url;
}

此外，该值在 integrationTest application.yml 文件中设置：

some_api:
  url: http://localhost:8082

还有这个创建 bean 的工厂：

@Factory
public class SomeApiDaoFactory {

  @Singleton
  public SomeApiDao someApiDao(SomeApiDaoConfig someApiDaoConfig) {
    return new SomeApiDao(someApiDaoConfig.getUrl());
  }
}

测试类基本是：

@MicronautTest(packages = {"<<path to someApiDao>>"})
public class ServiceTest {
  @Inject private BlockingStub blockingStub;
  @Inject private AnotherDao anotherDao;
  @Inject private SomeApiDao someApiDao;

@BeforeEach
  void setUp() {
    MockitoAnnotations.initMocks(this);
  }

... (tests)

@MockBean(AnotherDao.class)
  AnotherDao anotherDao() {
    return mock(AnotherDao.class);
  }

@MockBean(SomeApiDao.class)
  SomeApiDao someApiDao() {
    return mock(SomeApiDao.class);
  }

但是，当我运行测试时，它会在尝试初始化 SomeApiDao bean 时弹出此错误：

Failed to inject value for parameter [url] of class: <path to test>.$ServiceTest$SomeApiDao3Definition$Intercepted

Message: No bean of type [java.lang.String] exists. Make sure the bean is not disabled by bean requirements (enable trace logging for 'io.micronaut.context.condition' to check) and if the bean is enabled then ensure the class is declared a bean and annotation processing is enabled (for Java and Kotlin the 'micronaut-inject-java' dependency should be configured as an annotation processor).
Path Taken: new GrpcEmbeddedServer(ApplicationContext applicationContext,ApplicationConfiguration applicationConfiguration,GrpcServerConfiguration grpcServerConfiguration,[ServerBuilder serverBuilder],ApplicationEventPublisher eventPublisher,ComputeInstanceMetadataResolver computeInstanceMetadataResolver,List metadataContributors) --> ServerBuilder.serverBuilder(GrpcServerConfiguration configuration,[List serviceList],List interceptors,List serverTransportFilters) --> new Service([SomeApiDao someApiDao]) --> new $ServiceTest$SomeApiDao3Definition$Intercepted([String url],BeanContext beanContext,Qualifier qualifier,Interceptor[] interceptors)
io.micronaut.context.exceptions.DependencyInjectionException: Failed to inject value for parameter [url] of class: <path to test>.$ServiceTest$SomeApiDao3Definition$Intercepted

Answer 1

@Data
@ConfigurationProperties("some_api")
public class SomeApiDaoConfig {
    private String url;
}

我假设@Data 是Lombok 注释，因此它为url 创建了一个构造函数参数。 Micronaut 直到 1.3 才支持将配置键注入构造函数参数，它要求构造函数使用 ConfigurationInject 注释