Testing constraint violation

P/Sda1/Jpa/rdbms2catalog/solution/src/test/java/rdbms2catalog/TestSchemaConflict.java

+package rdbms2catalog;
+
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.EntityTransaction;
+import javax.persistence.Persistence;
+
+import org.junit.Test;
+
+import de.hdm_stuttgart.mi.sda1.sql2catalog.model.Description;
+import de.hdm_stuttgart.mi.sda1.sql2catalog.model.Product;
+
+public class TestSchemaConflict {
+	
+    static final EntityManager em;
+
+    static {
+	    final EntityManagerFactory emFactory =  Persistence.createEntityManagerFactory("create-drop");
+	    em = emFactory.createEntityManager();
+	}
+
+	@Test(expected=javax.persistence.PersistenceException.class)
+	public void insertData() {
+		{
+	          final EntityTransaction transaction = em.getTransaction();
+	          transaction.begin();
+	          
+	          final Product monkeyPickedTea = new Product(1, "Monkey Picked Tea", null);
+	          new Description(monkeyPickedTea, 0, "Picked only by specially trained monkeys");
+	          new Description(monkeyPickedTea, 0, "Rare wild Chinese tea"); // oops! Unique key violation
+	          
+	          em.persist(monkeyPickedTea);
+	          
+	          transaction.commit();
+	    }
+	}
+}
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