COWSubList.java

/*
 * Copyright (c) 2014, 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
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 * questions.
 */

/*
 * @test
 * @bug 8011645
 * @summary CopyOnWriteArrayList.COWSubList.subList does not validate range properly
 */

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

public class COWSubList {
    public static void main(String[] args) {
        List<String> list = new CopyOnWriteArrayList<>();
        list.add("A");
        list.add("B");
        list.add("C");
        list.add("D");
        list.add("E");

        expectThrow(() -> list.subList(-1, 5));
        expectThrow(() -> list.subList(0, 6));
        expectThrow(() -> list.subList(4, 3));
        expectThrow(() -> list.subList(0, 5).subList(-1, 5));
        expectThrow(() -> list.subList(0, 5).subList(0, 6));
        expectThrow(() -> list.subList(0, 5).subList(4, 3));
    }

    static void expectThrow(Runnable r) {
        try {
            r.run();
            throw new RuntimeException("Failed: expected IOOBE to be thrown");
        } catch (IndexOutOfBoundsException x) {
            // ok, expected
        }
    }
}