Spring Cloud 替代：使用JUnit规则

要获得更常规的WireMock体验，可以使用JUnit @Rules启动和停止服务器。为此，请使用方便类WireMockSpring获得一个Options实例，如以下示例所示：

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
public class WiremockForDocsClassRuleTests {

	// Start WireMock on some dynamic port
	// for some reason `dynamicPort()` is not working properly
	@ClassRule
	public static WireMockClassRule wiremock = new WireMockClassRule(
			WireMockSpring.options().dynamicPort());

	// A service that calls out over HTTP to wiremock's port
	@Autowired
	private Service service;

	@Before
	public void setup() {
		this.service.setBase("http://localhost:" + wiremock.port());
	}

	// Using the WireMock APIs in the normal way:
	@Test
	public void contextLoads() throws Exception {
		// Stubbing WireMock
		wiremock.stubFor(get(urlEqualTo("/resource")).willReturn(aResponse()
				.withHeader("Content-Type", "text/plain").withBody("Hello World!")));
		// We're asserting if WireMock responded properly
		assertThat(this.service.go()).isEqualTo("Hello World!");
	}

}

@ClassRule表示在运行了此类中的所有方法之后，服务器将关闭。