/*

 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.

 * 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.

 */

/* @test

 * @bug 4640544

 * @summary Unit test to check SocketChannel setOption/getOption/options

 *          methods.

 */

import java.nio.*;

import java.nio.channels.*;

import java.net.*;

import java.io.IOException;

import java.util.*;

public class SocketOptionTests {

    static void checkOption(SocketChannel sc, SocketOption name, Object expectedValue)

        throws IOException

    {

        Object value = sc.getOption(name);

        if (!value.equals(expectedValue))

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

    }

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

        SocketChannel sc = SocketChannel.open();

        // check supported options

        Set<SocketOption<?>> options = sc.supportedOptions();

        List<? extends SocketOption> expected = Arrays.asList(SO_SNDBUF, SO_RCVBUF,

            SO_KEEPALIVE, SO_REUSEADDR, SO_LINGER, TCP_NODELAY);

        for (SocketOption opt: expected) {

            if (!options.contains(opt))

                throw new RuntimeException(opt.name() + " should be supported");

        }

        // check specified defaults

        int linger = sc.<Integer>getOption(SO_LINGER);

        if (linger >= 0)

            throw new RuntimeException("initial value of SO_LINGER should be < 0");

        checkOption(sc, SO_KEEPALIVE, false);

        checkOption(sc, TCP_NODELAY, false);

        // allowed to change when not bound

        sc.setOption(SO_KEEPALIVE, true);

        checkOption(sc, SO_KEEPALIVE, true);

        sc.setOption(SO_KEEPALIVE, false);

        checkOption(sc, SO_KEEPALIVE, false);

        sc.setOption(SO_SNDBUF, 128*1024);      // can't check

        sc.setOption(SO_RCVBUF, 256*1024);      // can't check

        int before, after;

        before = sc.getOption(SO_SNDBUF);

        after = sc.setOption(SO_SNDBUF, Integer.MAX_VALUE).getOption(SO_SNDBUF);

        if (after < before)

            throw new RuntimeException("setOption caused SO_SNDBUF to decrease");

        before = sc.getOption(SO_RCVBUF);

        after = sc.setOption(SO_RCVBUF, Integer.MAX_VALUE).getOption(SO_RCVBUF);

        if (after < before)

            throw new RuntimeException("setOption caused SO_RCVBUF to decrease");

        sc.setOption(SO_REUSEADDR, true);

        checkOption(sc, SO_REUSEADDR, true);

        sc.setOption(SO_REUSEADDR, false);

        checkOption(sc, SO_REUSEADDR, false);

        sc.setOption(SO_LINGER, 10);

        linger = sc.<Integer>getOption(SO_LINGER);

        if (linger < 1)

            throw new RuntimeException("expected linger to be enabled");

        sc.setOption(SO_LINGER, -1);

        linger = sc.<Integer>getOption(SO_LINGER);

        if (linger >= 0)

            throw new RuntimeException("expected linger to be disabled");

        sc.setOption(TCP_NODELAY, true);

        checkOption(sc, TCP_NODELAY, true);

        sc.setOption(TCP_NODELAY, false);       // can't check

        // bind socket

        sc.bind(new InetSocketAddress(0));

        // allow to change when bound

        sc.setOption(SO_KEEPALIVE, true);

        checkOption(sc, SO_KEEPALIVE, true);

        sc.setOption(SO_KEEPALIVE, false);

        checkOption(sc, SO_KEEPALIVE, false);

        sc.setOption(SO_LINGER, 10);

        linger = sc.<Integer>getOption(SO_LINGER);

        if (linger < 1)

            throw new RuntimeException("expected linger to be enabled");

        sc.setOption(SO_LINGER, -1);

        linger = sc.<Integer>getOption(SO_LINGER);

        if (linger >= 0)

            throw new RuntimeException("expected linger to be disabled");

        sc.setOption(TCP_NODELAY, true);        // can't check

        sc.setOption(TCP_NODELAY, false);       // can't check

        // NullPointerException

        try {

            sc.setOption(null, "value");

            throw new RuntimeException("NullPointerException not thrown");

        } catch (NullPointerException x) {

        }

        try {

            sc.getOption(null);

            throw new RuntimeException("NullPointerException not thrown");

        } catch (NullPointerException x) {

        }

        // ClosedChannelException

        sc.close();

        try {

            sc.setOption(TCP_NODELAY, true);

            throw new RuntimeException("ClosedChannelException not thrown");

        } catch (ClosedChannelException x) {

        }

    }

}