Simple test for OPENJPA-116. Just modified the simple TestPersistence testcase with a new variation for testing the exception on getDelegate() when the EM is closed.

git-svn-id: https://svn.apache.org/repos/asf/incubator/openjpa/trunk@501955 13f79535-47bb-0310-9956-ffa450edef68

openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/persistence/simple/TestPersistence.java

@@ -107,6 +107,26 @@ public class TestPersistence
         em.close();
     }
 
+    /**
+     * Ensures that an IllegalStateException is thrown if getDelegate is called
+     * after closing the EntityManager.
+     */
+    public void testGetDelegateAfterClose() {
+        EntityManager em = emf.createEntityManager();
+
+        em.close();
+
+        try {
+            Object o = em.getDelegate();
+            fail();
+        }
+        catch(IllegalStateException ise) {
+            /*
+             * An IllegalStateException is expected. Nothing to do here.
+             */
+        }
+    }
+
     public static void main(String[] args) {
         TestRunner.run(TestPersistence.class);
     }