DATAREST-363 - Added test cases exposing legacy format issue.

Added integration test to show the "links" attribute rendered twice in the legacy JSON format.

spring-data-rest-webmvc/src/test/java/org/springframework/data/rest/webmvc/DuplicateLinkListingTests.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2015 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.data.rest.webmvc;
+
+import static org.hamcrest.Matchers.hasSize;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.rest.core.config.RepositoryRestConfiguration;
+import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;
+import org.springframework.data.rest.webmvc.jpa.JpaRepositoryConfig;
+import org.springframework.data.rest.webmvc.jpa.Person;
+import org.springframework.data.rest.webmvc.jpa.PersonRepository;
+import org.springframework.hateoas.LinkDiscoverer;
+import org.springframework.hateoas.LinkDiscoverers;
+import org.springframework.hateoas.core.JsonPathLinkDiscoverer;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.ResultActions;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+/**
+ * @author Greg Turnquist
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@WebAppConfiguration
+@ContextConfiguration(classes = {JpaRepositoryConfig.class, DuplicateLinkListingTests.ClassicConfiguration.class,
+		DuplicateLinkListingTests.Config.class })
+public class DuplicateLinkListingTests {
+
+	@Autowired WebApplicationContext context;
+	@Autowired LinkDiscoverers discoverers;
+	@Autowired PersonRepository personRepository;
+
+	private static MediaType MEDIA_TYPE = MediaType.APPLICATION_JSON;
+
+	protected TestMvcClient testMvcClient;
+	protected MockMvc mvc;
+
+	@Configuration
+	static class Config {
+
+		@Bean
+		public LinkDiscoverer classicLinkDiscover() {
+			return new JsonPathLinkDiscoverer("$.links[?(@.rel == '%s')].href", MEDIA_TYPE);
+		}
+	}
+
+	@Configuration
+	static class ClassicConfiguration extends RepositoryRestMvcConfiguration {
+
+		@Override
+		protected void configureRepositoryRestConfiguration(RepositoryRestConfiguration config) {
+			config.setDefaultMediaType(MEDIA_TYPE).useHalAsDefaultJsonMediaType(false);
+		}
+	}
+
+	@Before
+	public void setUp() {
+
+		mvc = MockMvcBuilders.webAppContextSetup(context).//
+				defaultRequest(get("/")).build();
+		testMvcClient = new TestMvcClient(mvc, discoverers);
+
+		personRepository.save(new Person("Frodo", "Baggins"));
+	}
+
+	@Test
+	public void testBasics() throws Exception {
+
+		ResultActions frodoActions = testMvcClient.follow("/people/1");
+
+		frodoActions.andExpect(jsonPath("$.links").value(hasSize(1)));
+	}
+}