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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 * questions.

 */

 /*

 * @test

 * @bug 8226783

 * @key headful

 * @summary Verify System L&F

 */

/*

 * Verify the System LAF is what we expect based on platform and,

 * in at least one case, the desktop environment.

 * Since changes to the system LAF are a once in a blue moon event,

 * this test is useful to tell us of unexpected problems.

 * Note: this test must be run in a headful environment

 * since otherwise a system LAF may not be available.

 */

public class SystemLookAndFeelTest {

    public static void main(String[] args) {

        String laf = javax.swing.UIManager.getSystemLookAndFeelClassName();

        String os = System.getProperty("os.name").toLowerCase();

        System.out.println("OS is " + os);

        System.out.println("Reported System LAF is " + laf);

        String expLAF = null;

        if (os.contains("windows")) {

            expLAF = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";

        } else if (os.contains("macos")) {

            expLAF = "com.apple.laf.AquaLookAndFeel";

        } else if (os.contains("linux") || os.contains("sunos")) {

           /*

            * The implementation keys off the following desktop setting to

            * decide if GTK is an appropriate system L&F.

            * In its absence, there probably isn't support for the GTK L&F

            * anyway. It does not tell us if the GTK libraries are available

            * but they really should be if this is a gnome session.

            * If it proves necessary the test can perhaps be updated to see

            * if the GTK LAF is listed as installed and can be instantiated.

            */

           String gnome = System.getenv("GNOME_DESKTOP_SESSION_ID");

           System.out.println("Gnome desktop session ID is " + gnome);

           if (gnome != null) {

               expLAF = "com.sun.java.swing.plaf.gtk.GTKLookAndFeel";

           } else if (os.contains("linux")) {

               expLAF = "javax.swing.plaf.metal.MetalLookAndFeel";

           } else if (os.contains("sunos")) {

               expLAF = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";

           }

       }

        System.out.println("Expected System LAF is " + expLAF);

        if (expLAF == null) {

            System.out.println("No match for expected LAF, unknown OS ?");

            return;

        }

        if (!(laf.equals(expLAF))) {

            throw new RuntimeException("LAF not as expected");

        }

   }

}