test/jdk/java/awt/Choice/ChoiceInLWTest/ChoiceInLWTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 4130788
 * @summary Choice components move unexpectedly when in lightweight containers
 * @library /java/awt/regtesthelpers
 * @build PassFailJFrame
 * @run main/manual ChoiceInLWTest
 */

import java.awt.BorderLayout;
import java.awt.Choice;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.lang.reflect.InvocationTargetException;

public class ChoiceInLWTest extends Frame implements Runnable {
    private final Choice choices;
    static final String INSTRUCTIONS = """
            After test starts wait for two seconds and open a choice.
            If choice's popup obscures the label above it press Fail.
            Otherwise press Pass.
            """;

    public ChoiceInLWTest() {
        setLayout(new BorderLayout());
        Container lwCont = new Container();
        lwCont.setLayout(new FlowLayout());
        choices = new Choice();
        choices.add("This is just a token item to get a nice width.");
        lwCont.add(choices);
        add("Center", lwCont);
        Label label = new Label("You should see an unobscured Choice below.");
        label.setAlignment(Label.CENTER);
        add("North", label);
        addChoiceItem();
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowOpened(WindowEvent e) {
                super.windowOpened(e);
                new Thread(ChoiceInLWTest.this).start();
            }
        });
        pack();
    }

    private void addChoiceItem() {
        choices.add("Adding an item used to move the Choice!");
    }

    public void run() {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException ignore) {
        }
        addChoiceItem();
    }

    public static void main(String[] args) throws InterruptedException,
            InvocationTargetException {
        PassFailJFrame.builder()
                .title("Choice in LW Container Test")
                .testUI(ChoiceInLWTest::new)
                .instructions(INSTRUCTIONS)
                .columns(40)
                .build()
                .awaitAndCheck();

    }
}