Spring-Boot 2.1.x和主要的bean定义

我最近将应用程序从Spring Boot 1.5.X迁移到Spring Boot 2.X ，发现覆盖Spring Bean定义存在问题。其中一种配置是在Kotlin中遵循的：

@Configuration
class DynamoConfig {@Beanfun dynamoDbAsyncClient(dynamoProperties: DynamoProperties): DynamoDbAsyncClient {...}@Beanfun dynampoDbSyncClient(dynamoProperties: DynamoProperties): DynamoDbClient {...}
}

现在，为了进行测试，我想覆盖这两个bean定义，并按照以下原则进行操作：

@SpringBootTest
class DynamoConfigTest {@Testfun saveHotel() {val hotelRepo = DynamoHotelRepo(localDynamoExtension.asyncClient!!)val hotel = Hotel(id = "1", name = "test hotel", address = "test address", state = "OR", zip = "zip")val resp = hotelRepo.saveHotel(hotel)StepVerifier.create(resp).expectNext(hotel).expectComplete().verify()}@TestConfigurationclass SpringConfig {@Beanfun dynamoDbAsyncClient(dynamoProperties: DynamoProperties): DynamoDbAsyncClient {...}@Beanfun dynamoDbSyncClient(dynamoProperties: DynamoProperties): DynamoDbClient {...}}
}

这种覆盖类型适用于Spring Boot 1.5.X，但不适用于Spring Boot 2.1.X，并显示以下错误：

Invalid bean definition with name 'dynamoDbAsyncClient' defined in sample.dyn.repo.DynamoConfigTest$SpringConfig:.. 
There is already .. defined in class path resource [sample/dyn/config/DynamoConfig.class]] bound

我认为这种行为是正确的，不允许以这种方式覆盖bean是应用程序的正确默认行为，但是我确实希望能够覆盖bean进行测试，这要归功于Stack Overflow答案和Spring Boot 2.1.X发行说明，解决方法是允许使用属性“ spring.main.allow-bean-definition-overriding = true”进行覆盖，因此，通过进行此更改，测试如下所示：

@SpringBootTest(properties = ["spring.main.allow-bean-definition-overriding=true"])
class DynamoConfigTest {@Testfun saveHotel() {val hotelRepo = DynamoHotelRepo(localDynamoExtension.asyncClient!!)val hotel = Hotel(id = "1", name = "test hotel", address = "test address", state = "OR", zip = "zip")val resp = hotelRepo.saveHotel(hotel)StepVerifier.create(resp).expectNext(hotel).expectComplete().verify()}@TestConfigurationclass SpringConfig {@Beanfun dynamoDbAsyncClient(dynamoProperties: DynamoProperties): DynamoDbAsyncClient {...}@Beanfun dynamoDbSyncClient(dynamoProperties: DynamoProperties): DynamoDbClient {...}}
}