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diff --git a/sdo-java/branches/sdo-java-M2/sdo-api/src/test/java/commonj/sdo/impl/HelperProviderTestCase.java b/sdo-java/branches/sdo-java-M2/sdo-api/src/test/java/commonj/sdo/impl/HelperProviderTestCase.java
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+++ b/sdo-java/branches/sdo-java-M2/sdo-api/src/test/java/commonj/sdo/impl/HelperProviderTestCase.java
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+/**
+ *
+ * Copyright 2005 International Business Machines Corporation
+ *
+ *  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 commonj.sdo.impl;
+
+import java.net.URL;
+import java.net.URLClassLoader;
+
+import junit.framework.TestCase;
+import test.DefaultHelperProvider;
+import test.TCCL1HelperProvider;
+
+/**
+ * @version $Revision$ $Date$
+ */
+public class HelperProviderTestCase extends TestCase {
+    private URL classes;
+    private URL testClasses;
+    private URL def;
+    private URL tccl1;
+
+    public void testInstanceIsNullWithNoImplementation() throws Exception {
+        assertNull(HelperProvider.INSTANCE);
+    }
+
+    public void testDefaultInstance() throws Exception {
+        ClassLoader cl = new URLClassLoader(new URL[]{classes, def, testClasses}, null);
+        Class providerClass = cl.loadClass(HelperProvider.class.getName());
+        Class implClass = cl.loadClass(DefaultHelperProvider.class.getName());
+        Object instance = providerClass.getField("INSTANCE").get(null);
+        assertNotNull(instance);
+        assertEquals(implClass, instance.getClass());
+    }
+
+    public void testLocateFromClassLoader() throws Exception {
+        ClassLoader cl = new URLClassLoader(new URL[]{classes, tccl1, testClasses}, null);
+        Class providerClass = cl.loadClass(HelperProvider.class.getName());
+        Object provider = providerClass.getMethod("getInstance", new Class[] {ClassLoader.class})
+            .invoke(null, new Object[] {cl});
+        assertNotNull(provider);
+        assertEquals(TCCL1HelperProvider.class.getName(), provider.getClass().getName());
+    }
+
+    public void testThreadContextInstance() throws Exception {
+        ClassLoader cl = new URLClassLoader(new URL[]{classes, tccl1, testClasses}, null);
+        ClassLoader tccl = Thread.currentThread().getContextClassLoader();
+        try {
+            Thread.currentThread().setContextClassLoader(cl);
+            Class providerClass = cl.loadClass(HelperProvider.class.getName());
+            Object provider = providerClass.getMethod("getInstance", new Class[0]).invoke(null, new Object[0]);
+            assertNotNull(provider);
+            assertEquals(TCCL1HelperProvider.class.getName(), provider.getClass().getName());
+        } finally {
+            Thread.currentThread().setContextClassLoader(tccl);
+        }
+
+    }
+
+    public void testSystemProperty() {
+        System.setProperty("commonj.sdo.impl.HelperProvider", "test.TCCL1HelperProvider");
+        try {
+            HelperProvider provider = HelperProvider.getInstance();
+            assertNotNull(provider);
+            assertEquals(TCCL1HelperProvider.class, provider.getClass());
+        } finally {
+            System.getProperties().remove("commonj.sdo.impl.HelperProvider");
+        }
+    }
+
+    protected void setUp() throws Exception {
+        super.setUp();
+        classes = new URL(HelperProvider.class.getResource("HelperProvider.class"), "../../..");
+        testClasses = new URL(HelperProviderTestCase.class.getResource("HelperProviderTestCase.class"), "../../..");
+        tccl1 = new URL(testClasses, "tccl1/");
+        def = new URL(testClasses, "default/");
+    }
+}