Question

我有一个postgres生产数据库，我的单元测试使用H2。我刚刚添加了一些使用JPA findOne(Example example)的JPA存储库，现在我的单元测试出错，并显示消息“找不到类型的属性示例”。

我有一个这样的自定义存储库：

@NoRepositoryBean
public interface RefDataRepository<Model, Id> extends JpaRepository<Model, Id> {
    Model findOrCreateByExample(Example<Model> example);
}

public class RefDataRepositoryImpl<Model, Id> extends SimpleJpaRepository<Model, Id> implements RefDataRepository<Model, Id> {
    public RefDataRepositoryImpl(JpaEntityInformation<Model, ?> entityInformation, EntityManager entityManager) {
        super(entityInformation, entityManager);
    }

    @Override
    @Transactional
    public Model findOrCreateByExample(Example<Model> example) {
        Optional<Model> existing = findOne(example);
        return existing.orElseGet(() -> save(example.getProbe()));
    }
}

我的JPA存储库很简单：

public interface MyRefRepository extends RefDataRepository<MyRef, Integer> {}

在生产代码中，这可以按我期望的那样工作：用示例调用findOne方法，如果找不到该方法，它将获取探针并保存该实例。但是我的单元测试在设置测试应用程序上下文时完全消失了。

我所有的单元测试都具有与此类似的注释：

@ActiveProfiles("test")
@ExtendWith(SpringExtension.class)
@SpringBootTest
@ContextConfiguration( classes = { TestDataSourceConfiguration.class, MyApplication.class })

并且TestDataSourceConfiguration在功能上与生产代码中的等效功能相同，从而建立了数据源。（例如，在测试中，它正在配置内存中的H2数据库。）它确实包含以下注释：

@EnableJpaRepositories(
        entityManagerFactoryRef = "entityManagerFactory",
        transactionManagerRef = "transactionManager",
        basePackages = {"com.example.services"},
        repositoryBaseClass = RefDataRepositoryImpl.class
)

（我的生产代码类似地将RefDataRepositoryImpl声明为存储库基类。）

我什至不了解单元测试的实际内容，所以这无关紧要。但是，我在@SpringBootTest上使用@DataJpaTest注释的每个测试都有相同的问题。

Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.example.models.MyRef com.example.services.RefDataRepository.findOrCreateByExample(org.springframework.data.domain.Example)! No property example found for type MyRef !
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:769) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:127) ~[spring-boot-test-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) ~[spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117) ~[spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108) ~[spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190) ~[spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132) ~[spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246) ~[spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:97) ~[spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.lambda$invokeTestInstancePostProcessors$5(ClassTestDescriptor.java:349) ~[junit-jupiter-engine-5.3.2.jar:5.3.2]
    at org.junit.jupiter.engine.descriptor.JupiterTestDescriptor.executeAndMaskThrowable(JupiterTestDescriptor.java:215) ~[junit-jupiter-engine-5.3.2.jar:5.3.2]
    at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.lambda$invokeTestInstancePostProcessors$6(ClassTestDescriptor.java:349) ~[junit-jupiter-engine-5.3.2.jar:5.3.2]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_161]
    at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[?:1.8.0_161]

如何让我的单元测试识别出Example不是属性而是Spring Data JPA魔术的一部分？这是我使用Example的唯一地方。测试数据库是简单的h2内存。

在Spring Data JPA单元测试中无法使用findOne（示例）

0 个答案: