added more test cases

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/persistencecontext/service/ExtendedPersistenceContextUserService.java

@@ -15,10 +15,6 @@ public class ExtendedPersistenceContextUserService {
     @PersistenceContext(type = PersistenceContextType.EXTENDED)
     private EntityManager entityManager;
 
-    public EntityManager getEntityManager() {
-        return entityManager;
-    }
-    
     @Transactional
     public User insertWithTransaction(User user) {
         entityManager.persist(user);

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/persistencecontext/service/TransctionPersistenceContextUserService.java

@@ -15,10 +15,6 @@ public class TransctionPersistenceContextUserService {
     @PersistenceContext
     private EntityManager entityManager;
     
-    public EntityManager getEntityManager() {
-        return entityManager;
-    }
-
     @Transactional
     public User insertWithTransaction(User user) {
         entityManager.persist(user);

persistence-modules/spring-boot-persistence/src/test/java/com/baeldung/persistencecontext/PersistenceContextIntegrationTest.java

@@ -40,7 +40,7 @@ public class PersistenceContextIntegrationTest {
     }
 
     @Test(expected = HttpServerErrorException.class)
-    public void testThatWhenUserSaveWithOutTransactionInPersistenceContextTypeTransactionThenShouldFailOnPersist() {
+    public void testThatWhenUserSaveWithOutTransactionInPersistenceContextTypeTransactionThenShouldWhtowTransactionRequiredExceptionOnPersist() {
         User user = new User(122L, "Devender", "admin");
         restTemplate.postForEntity(buildRequestUrl("v4/user/"), user, User.class);
     }
@@ -55,6 +55,21 @@ public class PersistenceContextIntegrationTest {
         assertThat(userFromTransctionPersistenceContext, Is.is(IsNull.nullValue()));
     }
 
+    @Test(expected = HttpServerErrorException.class)
+    public void testThatWhenAddUserWithSameIdentifierInPersistenceContextThenShouldThrowException() {
+        User user = new User(126L, "Devender", "admin");
+        restTemplate.postForEntity(buildRequestUrl("v2/user/"), user, User.class);
+        restTemplate.postForEntity(buildRequestUrl("v2/user/"), user, User.class);
+    }
+
+    @Test
+    public void testThatWhenUserSavedWithExtendedPersistenceContextWithTransactionThenUserShouldSaveEntityIntoDB() {
+        User user = new User(127L, "Devender", "admin");
+        restTemplate.postForEntity(buildRequestUrl("v3/user/"), user, User.class);
+        User userFromDB = restTemplate.getForObject(buildRequestUrl("v1/user/127"), User.class);
+        assertThat(userFromDB, Is.is(IsNull.notNullValue()));
+    }
+
     @Test
     public void testThatWhenUserSavedWithExtendedPersistenceContextWithTransactionThenUserShouldFlushCachedEntityIntoDB() {
         User user = new User(124L, "Devender", "admin");