1 /*
   2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24  /*
  25  * @test
  26  * @bug 8226783
  27  * @key headful
  28  * @summary Verify System L&F
  29  */
  30 
  31 /*
  32  * Verify the System LAF is what we expect based on platform and,
  33  * in at least one case, the desktop environment.
  34  * Since changes to the system LAF are a once in a blue moon event,
  35  * this test is useful to tell us of unexpected problems.
  36  * Note: this test must be run in a headful environment
  37  * since otherwise a system LAF may not be available.
  38  */
  39 
  40 public class SystemLookAndFeelTest {
  41 
  42     public static void main(String[] args) {
  43 
  44         String laf = javax.swing.UIManager.getSystemLookAndFeelClassName();
  45         String os = System.getProperty("os.name").toLowerCase();
  46         System.out.println("OS is " + os);
  47         System.out.println("Reported System LAF is " + laf);
  48 
  49         String expLAF = null;
  50         if (os.contains("windows")) {
  51             expLAF = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
  52         } else if (os.contains("macos")) {
  53             expLAF = "com.apple.laf.AquaLookAndFeel";
  54         } else if (os.contains("linux")) {
  55            /*
  56             * The implementation keys off the following desktop setting to
  57             * decide if GTK is an appropriate system L&F.
  58             * In its absence, there probably isn't support for the GTK L&F
  59             * anyway. It does not tell us if the GTK libraries are available
  60             * but they really should be if this is a gnome session.
  61             * If it proves necessary the test can perhaps be updated to see
  62             * if the GTK LAF is listed as installed and can be instantiated.
  63             */
  64            String gnome = System.getenv("GNOME_DESKTOP_SESSION_ID");
  65            System.out.println("Gnome desktop session ID is " + gnome);
  66            if (gnome != null) {
  67                expLAF = "com.sun.java.swing.plaf.gtk.GTKLookAndFeel";
  68            } else if (os.contains("linux")) {
  69                expLAF = "javax.swing.plaf.metal.MetalLookAndFeel";
  70            }
  71        }
  72         System.out.println("Expected System LAF is " + expLAF);
  73         if (expLAF == null) {
  74             System.out.println("No match for expected LAF, unknown OS ?");
  75             return;
  76         }
  77         if (!(laf.equals(expLAF))) {
  78             throw new RuntimeException("LAF not as expected");
  79         }
  80    }
  81 }