`@DynamicPropertySource`

@DynamicPropertySource 是一个注释，可以应用于需要在集成测试类中注册 dynamic 属性以添加到 ApplicationContext 的 PropertySources 中的方法，后者是为集成测试加载的。当您不了解属性值时，动态属性非常有用 - 例如，如果属性是由外部资源（例如由 Testcontainers 项目管理的容器）管理的。

@DynamicPropertySource is an annotation that can be applied to methods in integration test classes that need to register dynamic properties to be added to the set of PropertySources in the Environment for an ApplicationContext loaded for an integration test. Dynamic properties are useful when you do not know the value of the properties upfront – for example, if the properties are managed by an external resource such as for a container managed by the Testcontainers project.

以下示例演示如何注册动态属性：

The following example demonstrates how to register a dynamic property:

Java

@ContextConfiguration
class MyIntegrationTests {

	static MyExternalServer server = // ...

	@DynamicPropertySource (1)
	static void dynamicProperties(DynamicPropertyRegistry registry) { (2)
		registry.add("server.port", server::getPort); (3)
	}

	// tests ...
}

1	Annotate a `static` method with `@DynamicPropertySource`.
2	Accept a `DynamicPropertyRegistry` as an argument.
3	Register a dynamic `server.port` property to be retrieved lazily from the server. Kotlin `@ContextConfiguration class MyIntegrationTests { companion object { @JvmStatic val server: MyExternalServer = // ... @DynamicPropertySource (1) @JvmStatic fun dynamicProperties(registry: DynamicPropertyRegistry) { (2) registry.add("server.port", server::getPort) (3) } } // tests ... }`
4	Annotate a `static` method with `@DynamicPropertySource`.
5	Accept a `DynamicPropertyRegistry` as an argument.
6	Register a dynamic `server.port` property to be retrieved lazily from the server.

有关进一步的详细信息，请参见 Context Configuration with Dynamic Property Sources 。

See Context Configuration with Dynamic Property Sources for further details.