Fix lazy loading issue in owner details

src/main/java/org/springframework/samples/petclinic/owner/OwnerController.java

@@ -18,6 +18,7 @@ package org.springframework.samples.petclinic.owner;
 import java.util.List;
 import java.util.Map;
 
+import javax.transaction.Transactional;
 import javax.validation.Valid;
 
 import org.springframework.data.domain.Page;
@@ -153,11 +154,12 @@ class OwnerController {
 	 * @return a ModelMap with the model attributes for the view
 	 */
 	@GetMapping("/owners/{ownerId}")
+	@Transactional
 	public ModelAndView showOwner(@PathVariable("ownerId") int ownerId) {
 		ModelAndView mav = new ModelAndView("owners/ownerDetails");
 		Owner owner = this.owners.findById(ownerId);
 		for (Pet pet : owner.getPets()) {
-			pet.getVisits();
+			pet.getVisits().size();
 		}
 		mav.addObject(owner);
 		return mav;

src/test/java/org/springframework/samples/petclinic/PetclinicIntegrationTests.java

@@ -16,21 +16,43 @@
 
 package org.springframework.samples.petclinic;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import org.junit.jupiter.api.Test;
 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.boot.web.client.RestTemplateBuilder;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.RequestEntity;
+import org.springframework.http.ResponseEntity;
 import org.springframework.samples.petclinic.vet.VetRepository;
+import org.springframework.web.client.RestTemplate;
 
-@SpringBootTest
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
 class PetclinicIntegrationTests {
 
+	@LocalServerPort
+	int port;
+
 	@Autowired
 	private VetRepository vets;
 
+	@Autowired
+	private RestTemplateBuilder builder;
+
 	@Test
 	void testFindAll() throws Exception {
 		vets.findAll();
 		vets.findAll(); // served from cache
 	}
 
+	@Test
+	void testOwnerDetails() {
+		RestTemplate template = builder.rootUri("http://localhost:" + port).build();
+		ResponseEntity<String> result = template.exchange(RequestEntity.get("/owners/1").build(), String.class);
+		assertThat(result.getStatusCode()).isEqualTo(HttpStatus.OK);
+	}
+
 }

src/test/java/org/springframework/samples/petclinic/owner/OwnerControllerTests.java

@@ -31,7 +31,6 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.view;
 
 import java.time.LocalDate;
-import java.util.Collections;
 import java.util.List;
 
 import org.assertj.core.util.Lists;