PathableClassLoader parent = new PathableClassLoader(null);
parent.useExplicitLoader("junit.", Test.class.getClassLoader());
PathableClassLoader child = new PathableClassLoader(parent);
child.addLogicalLib("testclasses");
child.addLogicalLib("log4j12");
child.addLogicalLib("commons-logging");
Class testClass = child.loadClass(
"org.apache.commons.logging.log4j.log4j12.Log4j12StandardTests");
return new PathableTestSuite(testClass, child);