Add Wiremock features (Tomcat only for now)

User can depend on spring-cloud-contract-wiremock and
spring-cloud-starter-web (or tomcat) to get tomcat to run
the wiremock server. The idea is that wiremock runs in the
"ambient" server from Sprign Boot. So far we only support
Tomcat (should be easy to extend).

See tests in spring-cloud-contract-wiremock for details.

spring-cloud-contract-wiremock/src/test/java/org/springframework/cloud/contract/wiremock/WiremockHttpsServerApplicationTests.java

@@ -0,0 +1,38 @@
+package org.springframework.cloud.contract.wiremock;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.github.tomakehurst.wiremock.junit.WireMockClassRule;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes=WiremockTestsApplication.class, properties="app.baseUrl=https://localhost:8443")
+@DirtiesContext
+public class WiremockHttpsServerApplicationTests {
+
+	@ClassRule
+	public static WireMockClassRule wiremock = new WireMockClassRule(
+			WireMockSpring.config().httpsPort(8443));
+
+	@Autowired
+	private Service service;
+
+	@Test
+	public void contextLoads() throws Exception {
+		stubFor(get(urlEqualTo("/resource"))
+				.willReturn(aResponse().withHeader("Content-Type", "text/plain").withBody("Hello World!")));
+		assertThat(this.service.go()).isEqualTo("Hello World!");
+	}
+
+}

spring-cloud-contract-wiremock/src/test/java/org/springframework/cloud/contract/wiremock/WiremockImportApplicationTests.java

@@ -0,0 +1,33 @@
+package org.springframework.cloud.contract.wiremock;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes=WiremockTestsApplication.class, properties="app.baseUrl=http://localhost:8080", webEnvironment=WebEnvironment.NONE)
+@DirtiesContext
+@WireMockTest
+public class WiremockImportApplicationTests {
+
+	@Autowired
+	private Service service;
+
+	@Test
+	public void contextLoads() throws Exception {
+		stubFor(get(urlEqualTo("/resource"))
+				.willReturn(aResponse().withHeader("Content-Type", "text/plain").withBody("Hello World!")));
+		assertThat(this.service.go()).isEqualTo("Hello World!");
+	}
+
+}

spring-cloud-contract-wiremock/src/test/java/org/springframework/cloud/contract/wiremock/WiremockMockServerApplicationTests.java

@@ -0,0 +1,35 @@
+package org.springframework.cloud.contract.wiremock;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.client.MockRestServiceServer;
+import org.springframework.web.client.RestTemplate;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes=WiremockTestsApplication.class, webEnvironment=WebEnvironment.NONE)
+@DirtiesContext
+public class WiremockMockServerApplicationTests {
+
+	@Autowired
+	private RestTemplate restTemplate;
+
+	@Autowired
+	private Service service;
+
+	@Test
+	public void contextLoads() throws Exception {
+		MockRestServiceServer server = WireMockExpectations.with(this.restTemplate) //
+				.baseUrl("http://example.org") //
+				.expect("resource");
+		assertThat(this.service.go()).isEqualTo("Hello World");
+		server.verify();
+	}
+
+}

spring-cloud-contract-wiremock/src/test/java/org/springframework/cloud/contract/wiremock/WiremockServerApplicationTests.java

@@ -0,0 +1,38 @@
+package org.springframework.cloud.contract.wiremock;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.github.tomakehurst.wiremock.junit.WireMockClassRule;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes=WiremockTestsApplication.class, properties="app.baseUrl=http://localhost:8080", webEnvironment=WebEnvironment.NONE)
+@DirtiesContext
+public class WiremockServerApplicationTests {
+
+	@ClassRule
+	public static WireMockClassRule wiremock = new WireMockClassRule(WireMockSpring.config());
+
+	@Autowired
+	private Service service;
+
+	@Test
+	public void contextLoads() throws Exception {
+		stubFor(get(urlEqualTo("/resource"))
+				.willReturn(aResponse().withHeader("Content-Type", "text/plain").withBody("Hello World!")));
+		assertThat(this.service.go()).isEqualTo("Hello World!");
+	}
+
+}

spring-cloud-contract-wiremock/src/test/java/org/springframework/cloud/contract/wiremock/WiremockTestsApplication.java

@@ -0,0 +1,59 @@
+package org.springframework.cloud.contract.wiremock;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+@EnableAutoConfiguration
+@Import({Service.class, Controller.class})
+public class WiremockTestsApplication {
+
+	@Bean
+	public RestTemplate restTemplate() {
+		return new RestTemplate();
+	}
+
+	public static void main(String[] args) {
+		SpringApplication.run(WiremockTestsApplication.class, args);
+	}
+}
+
+@RestController
+class Controller {
+
+	private final Service service;
+
+	public Controller(Service service) {
+		this.service = service;
+	}
+
+	@RequestMapping("/")
+	public String home() {
+		return this.service.go();
+	}
+}
+
+@Component
+class Service {
+
+	@Value("${app.baseUrl:http://example.org}")
+	private String base;
+
+	private RestTemplate restTemplate;
+
+	public Service(RestTemplate restTemplate) {
+		this.restTemplate = restTemplate;
+	}
+
+	public String go() {
+		return this.restTemplate.getForEntity(this.base + "/resource", String.class).getBody();
+	}
+}

spring-cloud-contract-wiremock/src/test/resources/stubs/resource.json

@@ -0,0 +1,10 @@
+{
+  "request" : {
+    "urlPath" : "/resource",
+    "method" : "GET"
+  },
+  "response" : {
+    "status" : 200,
+    "body" : "Hello World"
+  }
+}