test/jdk/java/awt/Dialog/ValidateOnShow/ValidateOnShow.java

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/*
  @test
  @key headful
  @bug 7027013
  @summary Dialog.show() should validate the window unconditionally
  @author anthony.petrov@oracle.com: area=awt.toplevel
  @run main ValidateOnShow
*/

import java.awt.*;

public class ValidateOnShow {
    private static Dialog dialog = new Dialog((Frame)null);
    private static Panel panel = new Panel() {
        @Override
        public boolean isValidateRoot() {
            return true;
        }
    };
    private static Button button = new Button("Test");

    private static void sleep() {
        try { Thread.sleep(500); } catch (Exception e) {}
    }

    private static void test() {
        System.out.println("Before showing: panel.isValid=" + panel.isValid() + "      dialog.isValid=" + dialog.isValid());
        dialog.setVisible(true);
        sleep();
        System.out.println("After showing:  panel.isValid=" + panel.isValid() + "      dialog.isValid=" + dialog.isValid());

        if (!panel.isValid()) {
            dialog.dispose();
            throw new RuntimeException("The panel hasn't been validated upon showing the dialog");
        }

        dialog.setVisible(false);
        sleep();
    }

    public static void main(String[] args) {
        // setup
        dialog.add(panel);
        panel.add(button);

        dialog.setBounds(200, 200, 300, 200);

        // The first test should always succeed since the dialog is invalid initially
        test();

        // now invalidate the button and the panel
        button.setBounds(1, 1, 30, 30);
        sleep();
        // since the panel is a validate root, the dialog is still valid

        // w/o a fix this would fail
        test();

        // cleanup
        dialog.dispose();
    }
}