/*

 * Copyright 2005 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     6301085 6192552 6365601

 * @summary Basic tests for asLifoQueue

 * @author  Martin Buchholz

 */

import java.util.*;

import java.util.concurrent.*;

public class AsLifoQueue {

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

        try {

            Deque<String> deq = new ArrayDeque<String>();

            check(deq.addAll(Arrays.asList("b", "a", "c")));

            equal(deq.toString(), "[b, a, c]");

            check(deq.add("d"));

            equal(deq.toString(), "[b, a, c, d]");

            Queue<String> q = Collections.asLifoQueue(deq);

            check(q.add("e"));

            equal(deq.toString(),"[e, b, a, c, d]");

        } catch (Throwable t) { unexpected(t); }

        // Inspired by an excellent bug report by Jason Mehrens

        try {

            final Queue<String> q =

                Collections.asLifoQueue(new LinkedBlockingDeque<String>(3));

            check(q.isEmpty()); equal(q.size(), 0);

            check(q.add("a")); check(! q.isEmpty()); equal(q.size(), 1);

            check(q.offer("b"));

            check(q.add("c"));

            equal(q.size(), 3);

            check(! q.offer("d"));

            equal(q.size(), 3);

            THROWS(IllegalStateException.class,

                   new Fun(){void f(){ q.add("d"); }});

            equal(q.size(), 3);

            equal(q.toString(), "[c, b, a]");

            equal(q.peek(), "c");

            equal(q.element(), "c");

            equal(q.remove(), "c");

            equal(q.poll(), "b");

            equal(q.peek(), "a");

            equal(q.remove(), "a");

            THROWS(NoSuchElementException.class,

                   new Fun(){void f(){ q.remove(); }});

            equal(q.poll(), null);

            check(q.isEmpty());

            equal(q.size(), 0);

        } catch (Throwable t) { unexpected(t); }

    }

    //--------------------- 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");}

    static abstract class Fun { abstract void f() throws Throwable; }

    private static void THROWS(Class<? extends Throwable> k, Fun... fs) {

        for (Fun f : fs)

            try { f.f(); fail("Expected " + k.getName() + " not thrown"); }

            catch (Throwable t) {

                if (k.isAssignableFrom(t.getClass())) pass();

                else unexpected(t);}}

}