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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/");
}
}
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