/*

 * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/*

 * @test

 * @bug 6355327

 * @summary DelayQueue iterators should support concurrent modification

 * @author Martin Buchholz

 */

import java.io.*;

import java.util.*;

import java.util.concurrent.*;

public class Iterate {

    private static class Godot implements Delayed {

        public long getDelay(TimeUnit unit) {return Long.MAX_VALUE;}

        public int compareTo(Delayed other) {return 0;}

    }

    private static void realMain(String[] args) throws Throwable {

        Godot[] godots = new Godot[] { new Godot(), new Godot(), new Godot() };

        DelayQueue<Godot> q = new DelayQueue<Godot>(Arrays.asList(godots));

        Iterator<Godot> it = q.iterator();

        q.clear();

        check(it.hasNext());

        equal(it.next(), godots[0]);

        it.remove();

        check(q.isEmpty());

        q.addAll(Arrays.asList(godots));

        it = q.iterator();

        check(it.hasNext());

        it.next();

        equal(it.next(), godots[1]);

        it.remove();

        equal(q.size(), 2);

        check(q.contains(godots[0]));

        check(q.contains(godots[2]));

    }

    //--------------------- Infrastructure ---------------------------

    static volatile int passed = 0, failed = 0;

    static void pass() {passed++;}

    static void fail() {failed++; Thread.dumpStack();}

    static void fail(String msg) {System.out.println(msg); fail();}

    static void unexpected(Throwable t) {failed++; t.printStackTrace();}

    static void check(boolean cond) {if (cond) pass(); else fail();}

    static void equal(Object x, Object y) {

        if (x == null ? y == null : x.equals(y)) pass();

        else fail(x + " not equal to " + y);}

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

        try {realMain(args);} catch (Throwable t) {unexpected(t);}

        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);

        if (failed > 0) throw new AssertionError("Some tests failed");}

}