Added transactional awareness to the tests to ensure they pass.

build.gradle

@@ -30,7 +30,7 @@ configure(subprojects) { subproject ->
     compile.extendsFrom providedCompile
   }
 
-  [compileJava, compileTestJava]*.options*.compilerArgs = ["-Xlint:serial", "-Xlint:unchecked", "-Xlint:rawtypes"]
+  [compileJava, compileTestJava]*.options*.compilerArgs = ["-Xlint:serial", "-Xlint:unchecked"]
 
   project.sourceCompatibility = 1.6
   project.targetCompatibility = 1.6

spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/RepositoryRestHandlerAdapter.java

@@ -3,8 +3,6 @@ package org.springframework.data.rest.webmvc;
 import java.util.Arrays;
 
 import org.springframework.core.Ordered;
-import org.springframework.http.MediaType;
-import org.springframework.http.converter.json.MappingJacksonHttpMessageConverter;
 import org.springframework.web.method.HandlerMethod;
 import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;
 
@@ -18,13 +16,6 @@ public class RepositoryRestHandlerAdapter extends RequestMappingHandlerAdapter {
         new ServerHttpRequestMethodArgumentResolver(),
         new PagingAndSortingMethodArgumentResolver(config)
     ));
-
-    // Add JSON converter for special Spring Data media type
-    MappingJacksonHttpMessageConverter json = new MappingJacksonHttpMessageConverter();
-    json.setSupportedMediaTypes(
-        Arrays.asList(MediaType.APPLICATION_JSON, MediaType.valueOf("application/x-spring-data+json"))
-    );
-    getMessageConverters().add(json);
   }
 
   @Override public int getOrder() {

spring-data-rest-webmvc/src/test/groovy/org/springframework/data/rest/webmvc/spec/BaseSpec.groovy

@@ -16,6 +16,7 @@ import org.springframework.http.server.ServletServerHttpRequest
 import org.springframework.mock.web.MockHttpServletRequest
 import org.springframework.orm.jpa.EntityManagerHolder
 import org.springframework.test.context.ContextConfiguration
+import org.springframework.transaction.annotation.Transactional
 import org.springframework.web.util.UriComponentsBuilder
 import spock.lang.Specification
 
@@ -38,6 +39,7 @@ abstract class BaseSpec extends Specification {
   UriComponentsBuilder baseUri
   ObjectMapper mapper = new ObjectMapper()
 
+  @Transactional
   def setup() {
     baseUri = UriComponentsBuilder.fromUriString("http://localhost:8080/data")
 

spring-data-rest-webmvc/src/test/groovy/org/springframework/data/rest/webmvc/spec/RelationshipsSpec.groovy

@@ -1,12 +1,14 @@
 package org.springframework.data.rest.webmvc.spec
 
 import org.springframework.http.HttpStatus
+import org.springframework.transaction.annotation.Transactional
 
 /**
  * @author Jon Brisbin
  */
 class RelationshipsSpec extends BaseSpec {
 
+  @Transactional
   def "saves entity relationship"() {
 
     given: