test/jdk/java/util/concurrent/tck/LinkedBlockingQueue8Test.java

/*
 * 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
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 */

/*
 * 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.concurrent.LinkedBlockingQueue;
import java.util.Spliterator;

import junit.framework.Test;

public class LinkedBlockingQueue8Test extends JSR166TestCase {
    public static void main(String[] args) {
        main(suite(), args);
    }

    public static Test suite() {
        return newTestSuite(LinkedBlockingQueue8Test.class);
    }

    /**
     * Spliterator.getComparator always throws IllegalStateException
     */
    public void testSpliterator_getComparator() {
        assertThrows(IllegalStateException.class,
                     () -> new LinkedBlockingQueue<Item>().spliterator().getComparator());
    }

    /**
     * Spliterator characteristics are as advertised
     */
    public void testSpliterator_characteristics() {
        LinkedBlockingQueue<Item> q = new LinkedBlockingQueue<>();
        Spliterator<Item> s = q.spliterator();
        int characteristics = s.characteristics();
        int required = Spliterator.CONCURRENT
            | Spliterator.NONNULL
            | Spliterator.ORDERED;
        mustEqual(required, characteristics & required);
        assertTrue(s.hasCharacteristics(required));
        mustEqual(0, characteristics
                     & (Spliterator.DISTINCT
                        | Spliterator.IMMUTABLE
                        | Spliterator.SORTED));
    }

}