/*

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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.

 *

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 */

/* @test

 * @bug 8156121

 * @summary "Fail forward" fails for GTK3 if no GTK2 available

 * @modules java.desktop/sun.awt

 * @requires (os.family == "linux")

 * @run main GtkVersionTest

 */

import sun.awt.UNIXToolkit;

import java.awt.*;

import java.io.*;

public class GtkVersionTest {

    public static class LoadGtk {

        public static void main(String[] args) {

            ((UNIXToolkit)Toolkit.getDefaultToolkit()).loadGTK();

        }

    }

    public static void main(String[] args) throws Exception {

        test(null, "2");

        test("2", "2");

        test("2.2", "2");

        test("3", "3");

    }

    private static void test(String version, String expect) throws Exception {

        System.out.println( "Test " +

                (version == null ? "no" : " GTK" + version) + " preference.");

        Process p = Runtime.getRuntime().exec(System.getProperty("java.home") +

                "/bin/java " +

                (version == null ? "" : "-Djdk.gtk.version=" + version) +

                " -Djdk.gtk.verbose=true " +

                "--add-exports=java.desktop/sun.awt=ALL-UNNAMED " +

                "-cp " + System.getProperty("java.class.path", ".") +

                " GtkVersionTest$LoadGtk");

        p.waitFor();

        try (BufferedReader br = new BufferedReader(

                new InputStreamReader(p.getErrorStream()))) {

            String line;

            while ((line = br.readLine()) != null) {

                System.out.println(line);

                if (line.contains("Looking for GTK" + expect + " library")) {

                    return;

                } else if (line.contains("Looking for GTK")) {

                    break;

                }

            }

            throw new RuntimeException("Wrong GTK library version: \n" + line);

        }

    }

}