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/*

 * @test

 * @bug 6282072

 * @summary Make sure that "UTC" is an alias of "Etc/UTC" as defined in the tzdata backward.

 * @modules java.base/sun.util.calendar

 * @compile -XDignore.symbol.file UTCAliasTest.java

 */

import java.util.*;

import sun.util.calendar.ZoneInfo;

public class UTCAliasTest {

    public static void main(String[] args) {

        Map<String,String> map = ZoneInfo.getAliasTable();

        String alias = map.get("UTC");

        if (!alias.equals("Etc/UTC")) {

            throw new RuntimeException("got " + alias + ", expected Etc/UTC");

        }

        TimeZone GMT = TimeZone.getTimeZone("GMT");

        TimeZone UTC = TimeZone.getTimeZone("UTC");

        if (!GMT.hasSameRules(UTC)) {

            throw new RuntimeException("GMT and UTC have different rules");

        }

        TimeZone EtcUTC = TimeZone.getTimeZone("Etc/UTC");

        if (!UTC.hasSameRules(EtcUTC)) {

            throw new RuntimeException("UTC and Etc/UTC have different rules");

        }

    }

}