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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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/*

 * @test

 * @bug 6902861

 * @summary Test for a workaround when WEEK_OF_YEAR and YEAR are out of sync.

 */

import java.util.*;

import static java.util.GregorianCalendar.*;

public class Bug6902861 {

    static int errors = 0;

    public static void main(String [] args) {

        Locale loc = Locale.getDefault();

        try {

            Locale.setDefault(Locale.GERMANY);

            test(2010, JANUARY, 1, +1, 1);

            test(2010, JANUARY, 1, +2, 2);

            test(2010, JANUARY, 1, -1, 52);

            test(2010, JANUARY, 1, -2, 51);

            test(2008, DECEMBER, 31, +1, 1);

            test(2008, DECEMBER, 31, +2, 2);

            test(2008, DECEMBER, 31, -1, 52);

            test(2008, DECEMBER, 31, -2, 51);

            if (errors > 0) {

                throw new RuntimeException("Failed");

            }

        } finally {

            Locale.setDefault(loc);

        }

    }

    static void test(int year, int month, int dayOfMonth, int amount, int expected) {

        Calendar calendar = new GregorianCalendar(year, month, dayOfMonth);

        int week = calendar.get(WEEK_OF_YEAR); // fix the date

        calendar.roll(WEEK_OF_YEAR, amount);

        int got = calendar.get(WEEK_OF_YEAR);

        int y = calendar.get(YEAR);

        if (got != expected || y != year) {

            String date = String.format("%04d-%02d-%02d", year, month+1, dayOfMonth);

            System.err.printf("%s: roll %+d: got: %d,%2d; expected: %d,%2d%n",

                              date, amount, y, got, year, expected);

            errors++;

        }

    }

}