test/jdk/javax/swing/UIDefaults/8149879/InternalResourceBundle.java

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 * 2 along with this work; if not, write to the Free Software Foundation,
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import java.awt.EventQueue;

import javax.swing.UIDefaults;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.plaf.metal.MetalLookAndFeel;
import javax.swing.plaf.nimbus.NimbusLookAndFeel;

/**
 * @test
 * @bug 8149879
 * @summary The users should not register internal resource bundles.
 */
public class InternalResourceBundle {

    public static void main(final String[] args) throws Exception {
        EventQueue.invokeAndWait(() -> {
            // Indirectly register resource bundle from Nimbus, it will be used
            // by default
            try {
                UIManager.setLookAndFeel(new NimbusLookAndFeel());
            } catch (final UnsupportedLookAndFeelException e) {
                throw new RuntimeException(e);
            }
            UIDefaults defaults = UIManager.getDefaults();
            // Try to register resource bundle from Metal, which is
            // not enabled by default. This request should be skipped.
            defaults.addResourceBundle("com.sun.swing.internal.plaf.metal.resources.metal");

            Object value = getValue(defaults);
            if (value != null) {
                throw new RuntimeException("value is not null = " + value);
            }

            // Indirectly register resource bundle from Metal
            try {
                UIManager.setLookAndFeel(new MetalLookAndFeel());
            } catch (final UnsupportedLookAndFeelException e) {
                throw new RuntimeException(e);
            }
            value = getValue(defaults);
            if (value == null) {
                throw new RuntimeException("value is null");
            }
        });
    }

    private static Object getValue(UIDefaults defaults) {
        return defaults.get("MetalTitlePane.restore.titleAndMnemonic");
    }
}