/*

 * 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 and Martin Buchholz 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/

 */

import java.util.ArrayDeque;

import java.util.Collections;

import java.util.Spliterator;

import junit.framework.Test;

public class ArrayDeque8Test extends JSR166TestCase {

    public static void main(String[] args) {

        main(suite(), args);

    }

    public static Test suite() {

        return newTestSuite(ArrayDeque8Test.class);

    }

    /**

     * Spliterator.getComparator always throws IllegalStateException

     */

    public void testSpliterator_getComparator() {

        assertThrows(IllegalStateException.class,

                     () -> new ArrayDeque().spliterator().getComparator());

    }

    /**

     * Spliterator characteristics are as advertised

     */

    public void testSpliterator_characteristics() {

        ArrayDeque q = new ArrayDeque();

        Spliterator s = q.spliterator();

        int characteristics = s.characteristics();

        int required = Spliterator.NONNULL

            | Spliterator.ORDERED

            | Spliterator.SIZED

            | Spliterator.SUBSIZED;

        assertEquals(required, characteristics & required);

        assertTrue(s.hasCharacteristics(required));

        assertEquals(0, characteristics

                     & (Spliterator.CONCURRENT

                        | Spliterator.DISTINCT

                        | Spliterator.IMMUTABLE

                        | Spliterator.SORTED));

    }

    /**

     * Handle capacities near Integer.MAX_VALUE.

     * ant -Dvmoptions='-Xms28g -Xmx28g' -Djsr166.expensiveTests=true -Djsr166.tckTestClass=ArrayDeque8Test -Djsr166.methodFilter=testHugeCapacity tck

     */

    public void testHugeCapacity() {

        if (! (testImplementationDetails

               && expensiveTests

               && Runtime.getRuntime().maxMemory() > 24L * (1 << 30)))

            return;

        final Integer e = 42;

        final int maxArraySize = Integer.MAX_VALUE - 8;

        assertThrows(OutOfMemoryError.class,

                     () -> new ArrayDeque(Integer.MAX_VALUE));

        {

            ArrayDeque q = new ArrayDeque(maxArraySize - 1);

            assertEquals(0, q.size());

            assertTrue(q.isEmpty());

            q = null;

        }

        {

            ArrayDeque q = new ArrayDeque();

            assertTrue(q.addAll(Collections.nCopies(maxArraySize - 3, e)));

            assertEquals(e, q.peekFirst());

            assertEquals(e, q.peekLast());

            assertEquals(maxArraySize - 3, q.size());

            q.addFirst((Integer) 0);

            q.addLast((Integer) 1);

            assertEquals((Integer) 0, q.peekFirst());

            assertEquals((Integer) 1, q.peekLast());

            assertEquals(maxArraySize - 1, q.size());

            ArrayDeque qq = q;

            ArrayDeque smallish = new ArrayDeque(

                Collections.nCopies(Integer.MAX_VALUE - q.size() + 1, e));

            assertThrows(

                IllegalStateException.class,

                () -> qq.addAll(qq),

                () -> qq.addAll(smallish),

                () -> smallish.addAll(qq));

        }

    }

}