###40.3.9 自動配置的REST客戶端 你可以使用`@RestClientTest`測試REST客戶端，它默認會自動配置Jackson和GSON，配置`RestTemplateBuilder`，并添加`MockRestServiceServer`支持。你需要將`@RestClientTest`的`value`或`components`屬性值設置為待測試類： ```java @RunWith(SpringRunner.class) @RestClientTest(RemoteVehicleDetailsService.class) public class ExampleRestClientTest { @Autowired private RemoteVehicleDetailsService service; @Autowired private MockRestServiceServer server; @Test public void getVehicleDetailsWhenResultIsSuccessShouldReturnDetails() throws Exception { this.server.expect(requestTo("/greet/details")) .andRespond(withSuccess("hello", MediaType.TEXT_PLAIN)); String greeting = this.service.callRestService(); assertThat(greeting).isEqualTo("hello"); } } ``` 在[附錄](http://docs.spring.io/spring-boot/docs/1.4.1.RELEASE/reference/htmlsingle/#test-auto-configuration)中可以查看`@RestClientTest`啟用的自動配置列表。