test/jdk/javax/swing/JTextArea/6940863/bug6940863.java

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/**
 * @test
 * @key headful
 * @bug 6940863
 * @summary Textarea within scrollpane shows vertical scrollbar
 * @author Pavel Porvatov
 * @requires (os.family == "windows")
 * @library ../../../../lib/testlibrary
 * @build jdk.testlibrary.OSInfo
 * @run main bug6940863
 */

import jdk.testlibrary.OSInfo;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class bug6940863 {
    private static JFrame frame;

    private static JScrollPane scrollPane;

    private static final Timer timer = new Timer(1000, new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            boolean failed = scrollPane.getVerticalScrollBar().isShowing() ||
                    scrollPane.getHorizontalScrollBar().isShowing();

            frame.dispose();

            if (failed) {
                throw new RuntimeException("The test failed");
            }
        }
    });

    public static void main(String[] args) throws Exception {
        if (OSInfo.getOSType() != OSInfo.OSType.WINDOWS) {
            System.out.println("The test is suitable only for Windows OS. Skipped");
            return;
        }

        UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                JTextArea textArea = new JTextArea();

                textArea.setLineWrap(true);
                textArea.setWrapStyleWord(true);

                scrollPane = new JScrollPane(textArea);

                scrollPane.setMinimumSize(new Dimension(200, 100));
                scrollPane.setPreferredSize(new Dimension(300, 150));

                frame = new JFrame("Vertical scrollbar shown without text");

                frame.setContentPane(scrollPane);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.pack();
                frame.setVisible(true);

                timer.setRepeats(false);
                timer.start();
            }
        });
    }
}