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/*
* Copyright (c) 2002, 2023, 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 4514831
* @summary Confirm that GregorianCalendar.roll() works properly during
* transition from Daylight Saving Time to Standard Time.
* @run junit bug4514831
*/
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
import static java.util.GregorianCalendar.DAY_OF_MONTH;
import static java.util.GregorianCalendar.DAY_OF_WEEK;
import static java.util.GregorianCalendar.DAY_OF_WEEK_IN_MONTH;
import static java.util.GregorianCalendar.DAY_OF_YEAR;
import static java.util.GregorianCalendar.OCTOBER;
import static java.util.GregorianCalendar.THURSDAY;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class bug4514831 {
// Data of 7 rolls in the form of a string for the respective field
private static final String expectedDayOfYearData = "27-28 28-29 29-30 30-31 31-1 1-2 2-3 ";
private static final String expectedDayOfWeekData = "27-28 28-29 29-30 30-31 31-25 25-26 26-27 ";
private static final String expectedDayOfWeekInMonthData = "1-8 8-15 15-22 22-29 29-1 1-8 8-15 ";
private static final TimeZone savedTz = TimeZone.getDefault();
private static final Locale savedLocale = Locale.getDefault();
// Save JVM default Locale and TimeZone
@BeforeAll
void initAll() {
Locale.setDefault(Locale.US);
TimeZone.setDefault(TimeZone.getTimeZone("US/Pacific"));
}
// Restore JVM default Locale and TimeZone
@AfterAll
void tearDownAll() {
Locale.setDefault(savedLocale);
TimeZone.setDefault(savedTz);
}
/*
* Test some roll values during transition (DAY_OF_YEAR field). Uses
* the boolean roll method. Roll multiple times and attach the returned
* values to a long string which is then compared to the expected data.
*/
public void rollDayOfYearTest() {
StringBuilder actualRollData = new StringBuilder();
GregorianCalendar cal = new GregorianCalendar(2001, OCTOBER, 27);
for (int i = 0; i < 7; i++) {
actualRollData.append(cal.get(DAY_OF_MONTH)).append("-");
cal.roll(DAY_OF_YEAR, true);
actualRollData.append(cal.get(DAY_OF_MONTH)).append(" ");
}
assertEquals(expectedDayOfYearData, actualRollData.toString(),
"Wrong roll(DAY_OF_YEAR) transition");
}
/*
* Test some roll values during transition (DAY_OF_WEEK field). Uses
* the boolean roll method. Roll multiple times and attach the returned
* values to a long string which is then compared to the expected data.
*/
public void rollDayOfWeekTest() {
StringBuilder actualRollData = new StringBuilder();
GregorianCalendar cal = new GregorianCalendar(2001, OCTOBER, 27);
cal.setFirstDayOfWeek(THURSDAY);
for (int i = 0; i < 7; i++) {
actualRollData.append(cal.get(DAY_OF_MONTH)).append("-");
cal.roll(DAY_OF_WEEK, true);
actualRollData.append(cal.get(DAY_OF_MONTH)).append(" ");
}
assertEquals(expectedDayOfWeekData, actualRollData.toString(),
"Wrong roll(DAY_OF_WEEK) transition");
}
/*
* Test some roll values during transition (DAY_OF_WEEK_IN_MONTH field). Uses
* the boolean roll method. Roll multiple times and attach the returned
* values to a long string which is then compared to the expected data.
*/
public void rollDayOfWeekInMonthTest() {
StringBuilder actualRollData = new StringBuilder();
GregorianCalendar cal = new GregorianCalendar(2001, OCTOBER, 1);
for (int i = 0; i < 7; i++) {
actualRollData.append(cal.get(DAY_OF_MONTH)).append("-");
cal.roll(DAY_OF_WEEK_IN_MONTH, true);
actualRollData.append(cal.get(DAY_OF_MONTH)).append(" ");
}
assertEquals(expectedDayOfWeekInMonthData, actualRollData.toString(),
"Wrong roll(DAY_OF_WEEK_IN_MONTH) transition");
}
}
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