OPENJPA-1912 add missing test for enhancer fix

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@1221801 13f79535-47bb-0310-9956-ffa450edef68

openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/enhance/TestClassHierarchyEnhancement.java

@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.openjpa.enhance;
+
+
+import org.apache.openjpa.persistence.test.SingleEMFTestCase;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+
+/**
+ * This unit test checks the enhancement of a superclass/subclass
+ * constellation.
+ *
+ * @author <a href="mailto:struberg@apache.org>Mark Struberg</a>
+ */
+public class TestClassHierarchyEnhancement extends SingleEMFTestCase {
+
+    /**
+     * This tests OPENJPA-1912.
+     */
+    public void testSerialize() throws Exception {
+        // we don't even need an EntityManager for that ;)
+
+        EnhancedSubClass entity = new EnhancedSubClass();
+        entity.setValueInSubclass("sub");
+        entity.setValueInSuperclass("super");
+
+        byte[] serializedForm = serializeObject(entity);
+        EnhancedSubClass newEntity = (EnhancedSubClass) deSerializeObject(serializedForm);
+    }
+
+    private byte[] serializeObject(Object o) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ObjectOutputStream oos = new ObjectOutputStream(baos);
+        oos.writeObject(o);
+        return baos.toByteArray();
+    }
+
+    private Object deSerializeObject(byte[] serial)
+            throws IOException, ClassNotFoundException {
+        ByteArrayInputStream bais = new ByteArrayInputStream(serial);
+        ObjectInputStream ois = new ObjectInputStream(bais);
+        return ois.readObject();
+    }
+
+}