Quelle CustomTzIDCheckDST.java Sprache: JAVA

/*
* Copyright (c) 2022, 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 8285838
* @library /test/lib
* @summary This test will ensure that daylight savings rules are followed
* appropriately when setting a custom timezone ID via the TZ env variable.
* @requires os.family != "windows"
* @run main/othervm CustomTzIDCheckDST
*/
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.SimpleTimeZone;
import java.time.DayOfWeek;
import java.time.ZonedDateTime;
import java.time.temporal.TemporalAdjusters;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
public class CustomTzIDCheckDST {
    private static String CUSTOM_TZ = "MEZ-1MESZ,M3.5.0,M10.5.0";
    public static void main(String args[]) throws Throwable {
        if (args.length == 0) {
            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(List.of("CustomTzIDCheckDST", "runTZTest"));
            pb.environment().put("TZ", CUSTOM_TZ);
            OutputAnalyzer output = ProcessTools.executeProcess(pb);
            output.shouldHaveExitValue(0);
        } else {
            runTZTest();
        }
    }

    /* TZ code will always be set to "MEZ-1MESZ,M3.5.0,M10.5.0".
     * This ensures the transition periods for Daylights Savings should be at March's last
     * Sunday and October's last Sunday.
     */
    private static void runTZTest() {
        Date time = new Date();
        if (new SimpleTimeZone(3600000, "MEZ-1MESZ", Calendar.MARCH, -1, Calendar.SUNDAY, 0,
                Calendar.OCTOBER, -1, Calendar.SUNDAY, 0).inDaylightTime(time)) {
            // We are in Daylight savings period.
            if (time.toString().endsWith("GMT+02:00 " + Integer.toString(time.getYear() + 1900)))
                return;
        } else {
            if (time.toString().endsWith("GMT+01:00 " + Integer.toString(time.getYear() + 1900)))
                return;
        }

        // Reaching here means time zone did not match up as expected.
        throw new RuntimeException("Got unexpected timezone information: " + time);
    }

    private static ZonedDateTime getLastSundayOfMonth(ZonedDateTime date) {
        return date.with(TemporalAdjusters.lastInMonth(DayOfWeek.SUNDAY));
    }
}

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