/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * This file is available under and governed by the GNU General Public

 * License version 2 only, as published by the Free Software Foundation.

 * However, the following notice accompanied the original version of this

 * file:

 *

 * Written by Doug Lea with assistance from members of JCP JSR-166

 * Expert Group and released to the public domain, as explained at

 * http://creativecommons.org/publicdomain/zero/1.0/

 * Other contributors include Andrew Wright, Jeffrey Hayes,

 * Pat Fisher, Mike Judd.

 */

import junit.framework.Test;

import junit.framework.TestSuite;

public class ThreadTest extends JSR166TestCase {

    public static void main(String[] args) {

        main(suite(), args);

    }

    public static Test suite() {

        return new TestSuite(ThreadTest.class);

    }

    static class MyHandler implements Thread.UncaughtExceptionHandler {

        public void uncaughtException(Thread t, Throwable e) {

            e.printStackTrace();

        }

    }

    /**

     * getUncaughtExceptionHandler returns ThreadGroup unless set,

     * otherwise returning value of last setUncaughtExceptionHandler.

     */

    public void testGetAndSetUncaughtExceptionHandler() {

        // these must be done all at once to avoid state

        // dependencies across tests

        Thread current = Thread.currentThread();

        ThreadGroup tg = current.getThreadGroup();

        MyHandler eh = new MyHandler();

        assertSame(tg, current.getUncaughtExceptionHandler());

        current.setUncaughtExceptionHandler(eh);

        try {

            assertSame(eh, current.getUncaughtExceptionHandler());

        } finally {

            current.setUncaughtExceptionHandler(null);

        }

        assertSame(tg, current.getUncaughtExceptionHandler());

    }

    /**

     * getDefaultUncaughtExceptionHandler returns value of last

     * setDefaultUncaughtExceptionHandler.

     */

    public void testGetAndSetDefaultUncaughtExceptionHandler() {

        assertNull(Thread.getDefaultUncaughtExceptionHandler());

        // failure due to SecurityException is OK.

        // Would be nice to explicitly test both ways, but cannot yet.

        Thread.UncaughtExceptionHandler defaultHandler

            = Thread.getDefaultUncaughtExceptionHandler();

        MyHandler eh = new MyHandler();

        try {

            Thread.setDefaultUncaughtExceptionHandler(eh);

            try {

                assertSame(eh, Thread.getDefaultUncaughtExceptionHandler());

            } finally {

                Thread.setDefaultUncaughtExceptionHandler(defaultHandler);

            }

        } catch (SecurityException ok) {

            assertNotNull(System.getSecurityManager());

        }

        assertSame(defaultHandler, Thread.getDefaultUncaughtExceptionHandler());

    }

    // How to test actually using UEH within junit?

}