Added test showing misbehaviour of AbstractPathImpl.get(String), whic…

…h throws a NullPointerException while preparing an IllegalArgumentException that should be thrown here.

Signed-off-by: Michael Rudolf <javaprog@gmx.de>

hibernate-entitymanager/src/test/java/org/hibernate/ejb/criteria/paths/AbstractPathImplTest.java

@@ -0,0 +1,57 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2010, Red Hat Inc. or third-party contributors as
+ * indicated by the @author tags or express copyright attribution
+ * statements applied by the authors.  All third-party contributions are
+ * distributed under license by Red Hat Inc.
+ *
+ * This copyrighted material is made available to anyone wishing to use, modify,
+ * copy, or redistribute it subject to the terms and conditions of the GNU
+ * Lesser General Public License, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this distribution; if not, write to:
+ * Free Software Foundation, Inc.
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA  02110-1301  USA
+ */
+package org.hibernate.ejb.criteria.paths;
+
+import javax.persistence.EntityManager;
+import javax.persistence.TypedQuery;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.Join;
+import javax.persistence.criteria.Root;
+
+import org.hibernate.ejb.metamodel.AbstractMetamodelSpecificTest;
+import org.hibernate.ejb.metamodel.LineItem;
+import org.hibernate.ejb.metamodel.LineItem_;
+import org.hibernate.ejb.metamodel.Order;
+import org.hibernate.ejb.metamodel.Order_;
+
+import org.junit.Test;
+
+/**
+ * @author Michael Rudolf
+ */
+public class AbstractPathImplTest extends AbstractMetamodelSpecificTest {
+	@Test(expected=IllegalArgumentException.class)
+	public void testGetNonExistingAttributeViaName() {
+		EntityManager em = getOrCreateEntityManager();
+		try {
+			CriteriaBuilder criteriaBuilder = em.getCriteriaBuilder();
+			CriteriaQuery<Order> criteria = criteriaBuilder.createQuery( Order.class );
+			Root<Order> orderRoot = criteria.from( Order.class );
+			orderRoot.get( "nonExistingAttribute" );
+		} finally {
+			em.close();
+		}
+	}
+}