test/jdk/sun/util/calendar/Bug8176160.java

/*
 * Copyright (c) 2017, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 *@test
 *@bug 8176160
 *@summary Make sure CalendarSystem.getEra(name) is consistent with getEras()
 *@modules java.base/sun.util.calendar
 *@run main/othervm Bug8176160
 */

import java.util.Arrays;
import java.util.List;
import sun.util.calendar.CalendarSystem;
import sun.util.calendar.Era;

public class Bug8176160 {

    public static void main(String[] args) throws Exception {
        List.of("gregorian", "japanese", "julian").stream()
            .map(CalendarSystem::forName)
            .forEach(cal -> {
                Era[] eras = cal.getEras();
                if (eras != null) {
                    Arrays.stream(eras)
                        .forEach(era -> {
                            System.out.printf("cal: %s, era: %s\n", cal, era);
                            if (cal.getEra(era.getName()) != era) {
                                throw new RuntimeException("no match");
                            }
                        });
                }
            });
    }
}