HHH-6697 Added test case.

hibernate-entitymanager/src/test/java/org/hibernate/ejb/test/EntityManagerTest.java

@@ -32,9 +32,11 @@ import java.io.ObjectOutputStream;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
+import javax.persistence.EntityExistsException;
 import javax.persistence.EntityManager;
 import javax.persistence.EntityNotFoundException;
 import javax.persistence.FlushModeType;
+import javax.persistence.PersistenceException;
 import javax.persistence.Query;
 
 import org.hibernate.FlushMode;
@@ -234,6 +236,39 @@ public class EntityManagerTest extends TestCase {
 		em.close();
 	}
 
+	public void testPersistExisting() throws Exception {
+		EntityManager em = getOrCreateEntityManager();
+		em.getTransaction().begin();
+		Wallet w = new Wallet();
+		w.setBrand( "Lacoste" );
+		w.setModel( "Minimic" );
+		w.setSerial( "0100202002" );
+		em.persist( w );
+		w = new Wallet();
+		w.setBrand( "Lacoste" );
+		w.setModel( "Minimic" );
+		w.setSerial( "0100202002" );
+		try {
+		    em.persist( w );
+		}
+		catch ( EntityExistsException eee ) {
+			//success
+			if ( em.getTransaction() != null ) {
+				em.getTransaction().rollback();
+			}
+			em.close();
+			return;
+		}
+		try {
+	        em.getTransaction().commit();
+		    fail( "Should have raised an exception" );
+		}
+		catch (PersistenceException pe) {}
+		finally {
+			em.close();
+		}
+	}
+
 	public void testSerializableException() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();