import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.lang.ref.WeakReference;

/**
 * @test
 * @summary AwtList not garbage collected
 * @run main AwtListGarbageCollectedTest
 */

public class AwtListGarbageCollectedTest {
    public static void main(String[] args) {
        Frame frame = new Frame("List leak test");
        try {
            test(frame);
        } catch (RuntimeException e) {
            frame.dispose();
            throw e;
        }
    }

    private static void test(Frame frame) {
        WeakReference<List> weakRef = null;
        try {
            frame.addWindowListener(new WindowAdapter() {
                @Override
                public void windowClosing(WindowEvent e) {
                    System.exit(0);
                }
            });
            frame.setSize(300, 200);
            Panel panel = new Panel();
            frame.add(panel);
            frame.setVisible(true);

            {
                List list = new List();
                frame.add(list);
                list.setMultipleMode(true);
                frame.remove(list);
                weakRef = new WeakReference<List>(list);
            }

            //make OutOfMemoryError to force gc
            String veryLongString = new String(new char[100]);
            while (true) {
                veryLongString += veryLongString;
            }
        } catch (OutOfMemoryError e) {
            if (weakRef == null)
                throw new RuntimeException("Weak ref wasn't created");
            if (weakRef.get() != null)
                throw new RuntimeException("List wasn't garbage collected");
        }
    }
}