Fix content negotiation for /vets

See gh-326

src/main/java/org/springframework/samples/petclinic/vet/VetController.java

@@ -48,7 +48,7 @@ class VetController {
         return "vets/vetList";
     }
 
-    @GetMapping({ "/vets.json", "/vets.xml" })
+    @GetMapping({ "/vets" })
     public @ResponseBody Vets showResourcesVetList() {
         // Here we are returning an object of type 'Vets' rather than a collection of Vet
         // objects so it is simpler for JSon/Object mapping

src/main/resources/templates/vets/vetList.html

@@ -26,8 +26,7 @@
 
   <table class="table-buttons">
     <tr>
-      <td><a th:href="@{/vets.xml}">View as XML</a></td>
-      <td><a th:href="@{/vets.json}">View as JSON</a></td>
+      <td><a th:href="@{/vets}">View as XML</a></td>
     </tr>
   </table>
 

src/test/java/org/springframework/samples/petclinic/vet/VetControllerTests.java

@@ -65,7 +65,7 @@ public class VetControllerTests {
 
     @Test
     public void testShowResourcesVetList() throws Exception {
-        ResultActions actions = mockMvc.perform(get("/vets.json").accept(MediaType.APPLICATION_JSON))
+        ResultActions actions = mockMvc.perform(get("/vets").accept(MediaType.APPLICATION_JSON))
             .andExpect(status().isOk());
         actions.andExpect(content().contentType("application/json;charset=UTF-8"))
             .andExpect(jsonPath("$.vetList[0].id").value(1));
@@ -73,7 +73,7 @@ public class VetControllerTests {
 
     @Test
     public void testShowVetListXml() throws Exception {
-        mockMvc.perform(get("/vets.xml").accept(MediaType.APPLICATION_XML))
+        mockMvc.perform(get("/vets").accept(MediaType.APPLICATION_XML))
             .andExpect(status().isOk())
             .andExpect(content().contentType(MediaType.APPLICATION_XML_VALUE))
             .andExpect(content().node(hasXPath("/vets/vetList[id=1]/id")));