package rename for test libraries.

[utils] / test / enterprise / src / test / java / org / wamblee / test / persistence / MyEntityExampleTestBase.java

diff --git a/test/enterprise/src/test/java/org/wamblee/test/persistence/MyEntityExampleTestBase.java b/test/enterprise/src/test/java/org/wamblee/test/persistence/MyEntityExampleTestBase.java
new file mode 100644 (file)
index 0000000..737455c
--- /dev/null
+++ b/test/enterprise/src/test/java/org/wamblee/test/persistence/MyEntityExampleTestBase.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2005-2010 the original author or authors.
+ * 
+ * Licensed 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.wamblee.test.persistence;
+
+import static junit.framework.Assert.*;
+
+import javax.persistence.EntityManager;
+
+import org.dbunit.IDatabaseTester;
+import org.dbunit.dataset.ITable;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.wamblee.test.persistence.DatabaseUtils;
+import org.wamblee.test.persistence.JpaBuilder;
+import org.wamblee.test.persistence.JpaTester;
+import org.wamblee.test.persistence.JpaBuilder.JpaUnitOfWork;
+
+/**
+ * This class shows an example of how to test an entity using jpa.
+ */
+public class MyEntityExampleTestBase {
+
+    // This is the magical object that does all the test setup.
+    private JpaTester jpaTester;
+
+    // The jpa tester initializes a lot for us....
+
+    // A JPA builder that provides a transaction scoped entity manager for us.
+    private JpaBuilder builder;
+
+    // The database tester for dbunit which is appropriately configured for our
+    // persistence unit.
+    private IDatabaseTester dbtester;
+
+    // Database utilities with some additional functionality for working with
+    // the databse
+    // such as dropping tables, cleaning tables, etc.
+    private DatabaseUtils dbutils;
+
+    @Before
+    public void setUp() throws Exception {
+
+        // First we create the JpaTester by telling us which persistence unit we
+        // are going to test
+        jpaTester = new JpaTester(new MyPersistenceUnit());
+        jpaTester.start();
+
+        // Retrieve some useful objects fromt he jpa tester. It also provides
+        // direct access to the datasource
+        // but we don't need it. We can use datbase utils if we want to execute
+        // straight JDBC calls.
+        builder = jpaTester.getJpaBuilder();
+        dbtester = jpaTester.getDbUtils().createDbTester(new MyTables());
+        dbutils = jpaTester.getDbUtils();
+    }
+
+    @After
+    public void tearDown() {
+        dbutils.stop();
+        jpaTester.stop();
+    }
+
+    @Test
+    public void testEntityPersistence() throws Exception {
+
+        // Use the JPA builder to create a transaction scoped entity manager for
+        // as and execute the
+        // unit of work.
+        builder.execute(new JpaUnitOfWork<Void>() {
+            public Void execute(EntityManager aEm) {
+                MyEntity entity = new MyEntity("a", "b");
+                aEm.persist(entity);
+                return null;
+            }
+        });
+
+        // Verify one row is written (using Db unit)
+        ITable table = dbtester.getDataSet().getTable("XYZ_MYENTITY");
+        assertEquals(1, table.getRowCount());
+
+        assertEquals("a", table.getValue(0, "SLEUTELTJE"));
+        assertEquals("b", table.getValue(0, "VALUE"));
+
+        // For this simple test, it can also be done through DatabaseUtils
+        assertEquals(1, dbutils.getTableSize("XYZ_MYENTITY"));
+
+    }
+
+}