* @param harness the test harness (<code>null</code> not permitted).
*/
public void test(TestHarness harness)
{
JFileChooser jfc = new JFileChooser();
jfc.addPropertyChangeListener(this);
harness.check(jfc.getControlButtonsAreShown(), true);
jfc.setControlButtonsAreShown(false);
harness.check(jfc.getControlButtonsAreShown(), false);
harness.check(event.getPropertyName(),