OPENJPA-919 Committing test code contributed by Donald Woods

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@743473 13f79535-47bb-0310-9956-ffa450edef68

openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/persistence/relations/TestOneOneNulls.java

@@ -0,0 +1,147 @@
+/*
+ * 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.persistence.relations;
+
+import java.util.List;
+import javax.persistence.EntityManager;
+
+import junit.textui.TestRunner;
+import org.apache.openjpa.persistence.OpenJPAEntityManager;
+import org.apache.openjpa.persistence.OpenJPAQuery;
+import org.apache.openjpa.persistence.test.SingleEMFTestCase;
+
+/**
+ * Test that both sides of a mapped-by relation are null when not set
+ * or when explicitly set to null.
+ *
+ */
+public class TestOneOneNulls extends SingleEMFTestCase {
+
+    private long pid1;
+    private long pid2;
+    private long cid1;
+    private long cid2;
+
+    public void setUp() {
+        setUp(BidiParent.class, BidiChild.class, CLEAR_TABLES);
+        
+        EntityManager em = emf.createEntityManager();
+        em.getTransaction().begin();
+
+        for (int i = 1; i <= 2; i++) {
+            BidiParent parent = new BidiParent();
+            parent.setName("parent" + i);
+            em.persist(parent);
+
+            BidiChild child = new BidiChild();
+            child.setName("child" + i);
+            // for first set, don't set the relationship
+            // but explicitly set to null for the second set
+            if (i == 2) {
+                child.setOneToOneParent(null);
+                parent.setOneToOneChild(null);
+            }
+            em.persist(child);
+
+            if (i == 1) {
+                pid1 = parent.getId();
+                cid1 = child.getId();
+            } else {
+                pid2 = parent.getId();
+                cid2 = child.getId();
+            }
+        }
+
+        em.getTransaction().commit();
+        em.close();
+    }
+
+    public void testFindOneToOneNullDefaults() {
+        BidiParent parent;
+        BidiChild child;
+
+        OpenJPAEntityManager em = emf.createEntityManager();
+        em.getFetchPlan().addField(BidiParent.class, "oneToOneChild");
+        em.getFetchPlan().addField(BidiChild.class, "oneToOneParent");
+
+        // test first set w/o explicit nulls
+        parent = em.find(BidiParent.class, pid1);
+        assertEquals("parent1", parent.getName());
+        assertNull(parent.getOneToOneChild());
+        child = em.find(BidiChild.class, cid1);
+        assertEquals("child1", child.getName());
+        assertNull(child.getOneToOneParent());
+
+        em.close();
+    }
+
+    public void testFindOneToOneNullExplicit() {
+        BidiParent parent;
+        BidiChild child;
+
+        OpenJPAEntityManager em = emf.createEntityManager();
+        em.getFetchPlan().addField(BidiParent.class, "oneToOneChild");
+        em.getFetchPlan().addField(BidiChild.class, "oneToOneParent");
+
+        // test second set with explicit nulls
+        parent = em.find(BidiParent.class, pid2);
+        assertEquals("parent2", parent.getName());
+        assertNull(parent.getOneToOneChild());
+        child = em.find(BidiChild.class, cid2);
+        assertEquals("child2", child.getName());
+        assertNull(child.getOneToOneParent());
+
+        em.close();
+    }
+
+    public void testQueryOneToOneNullChild() {
+        OpenJPAEntityManager em = emf.createEntityManager();
+        OpenJPAQuery q = em.createQuery("SELECT o FROM BidiParent o "
+            + "ORDER BY o.name ASC");
+        q.getFetchPlan().addField(BidiParent.class, "oneToOneChild");
+        q.getFetchPlan().addField(BidiChild.class, "oneToOneParent");
+        List<BidiParent> res = (List<BidiParent>) q.getResultList(); 
+        assertEquals(2, res.size());
+        for (int i = 0; i < res.size(); i++) {
+            assertEquals("parent" + (i + 1), res.get(i).getName());
+            assertNull(res.get(i).getOneToOneChild());
+        }
+        em.close();
+    }
+
+    public void testQueryOneToOneNullParent() {
+        OpenJPAEntityManager em = emf.createEntityManager();
+        OpenJPAQuery q = em.createQuery("SELECT o FROM BidiChild o "
+            + "ORDER BY o.name ASC");
+        q.getFetchPlan().addField(BidiParent.class, "oneToOneChild");
+        q.getFetchPlan().addField(BidiChild.class, "oneToOneParent");
+        List<BidiChild> res = (List<BidiChild>) q.getResultList(); 
+        assertEquals(2, res.size());
+        for (int i = 0; i < res.size(); i++) {
+            assertEquals("child" + (i + 1), res.get(i).getName());
+            assertNull(res.get(i).getOneToOneParent());
+        }
+        em.close();
+    }
+
+    public static void main(String[] args) {
+        TestRunner.run(TestOneOneNulls.class);
+    }
+}
+