Update @WebMvcTest to auto-configure Spring HATEOAS

Closes gh-6043

spring-boot-test-autoconfigure/pom.xml

@@ -157,5 +157,10 @@
 			<artifactId>spring-hateoas</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.plugin</groupId>
+			<artifactId>spring-plugin-core</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 </project>

spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/AutoConfigureWebMvc.java

@@ -26,6 +26,7 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.autoconfigure.freemarker.FreeMarkerAutoConfiguration;
 import org.springframework.boot.autoconfigure.groovy.template.GroovyTemplateAutoConfiguration;
 import org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration;
+import org.springframework.boot.autoconfigure.hateoas.HypermediaAutoConfiguration;
 import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
 import org.springframework.boot.autoconfigure.mustache.MustacheAutoConfiguration;
 import org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration;
@@ -48,7 +49,8 @@ import org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration;
 @ImportAutoConfiguration({ WebMvcAutoConfiguration.class, GsonAutoConfiguration.class,
 		JacksonAutoConfiguration.class, HttpMessageConvertersAutoConfiguration.class,
 		FreeMarkerAutoConfiguration.class, GroovyTemplateAutoConfiguration.class,
-		MustacheAutoConfiguration.class, ThymeleafAutoConfiguration.class })
+		MustacheAutoConfiguration.class, ThymeleafAutoConfiguration.class,
+		HypermediaAutoConfiguration.class })
 public @interface AutoConfigureWebMvc {
 
 }

spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/servlet/HateoasController.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.test.autoconfigure.web.servlet;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.hateoas.Link;
+import org.springframework.hateoas.Resource;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * {@link RestController} used by {@link WebMvcTestHateoasIntegrationTests}.
+ *
+ * @author Andy Wilkinson
+ */
+@RestController
+@RequestMapping("/hateoas")
+class HateoasController {
+
+	@RequestMapping("/resource")
+	public Resource<Map<String, String>> resource() {
+		return new Resource<Map<String, String>>(new HashMap<>(),
+				new Link("self", "http://api.example.com"));
+	}
+
+	@RequestMapping("/plain")
+	public Map<String, String> plain() {
+		return new HashMap<>();
+	}
+
+}

spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/servlet/WebMvcTestHateoasIntegrationTests.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.test.autoconfigure.web.servlet;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.header;
+
+/**
+ * Integration tests for {@link WebMvcTest} and Spring HATEOAS.
+ *
+ * @author Andy Wilkinson
+ */
+@RunWith(SpringRunner.class)
+@WebMvcTest(secure = false)
+public class WebMvcTestHateoasIntegrationTests {
+
+	@Autowired
+	private MockMvc mockMvc;
+
+	@Test
+	public void plainResponse() throws Exception {
+		this.mockMvc.perform(get("/hateoas/plain")).andExpect(header()
+				.string(HttpHeaders.CONTENT_TYPE, "application/json;charset=UTF-8"));
+	}
+
+	@Test
+	public void hateoasResponse() throws Exception {
+		this.mockMvc.perform(get("/hateoas/resource")).andExpect(header()
+				.string(HttpHeaders.CONTENT_TYPE, "application/hal+json;charset=UTF-8"));
+	}
+
+}