Java example source code file (TCKIsoFields.java)

This example Java source code file (TCKIsoFields.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

dataprovider, datetimeformatter, datetimeformatterbuilder, dayofweek, failed, localdate, monday, object, should, sunday, temporal, test, thursday, wednesday

The TCKIsoFields.java Java example source code

/*
 * Copyright (c) 2012, 2013, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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.
 */

/*
 * Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 *  * Neither the name of JSR-310 nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package tck.java.time.temporal;

import static java.time.DayOfWeek.FRIDAY;
import static java.time.DayOfWeek.MONDAY;
import static java.time.DayOfWeek.SATURDAY;
import static java.time.DayOfWeek.SUNDAY;
import static java.time.DayOfWeek.THURSDAY;
import static java.time.DayOfWeek.TUESDAY;
import static java.time.DayOfWeek.WEDNESDAY;
import static java.time.temporal.ChronoField.DAY_OF_WEEK;
import static java.time.temporal.ChronoField.YEAR;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.fail;

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.format.DateTimeParseException;
import java.time.format.ResolverStyle;
import java.time.temporal.IsoFields;
import java.time.temporal.Temporal;
import java.time.temporal.ValueRange;

import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

/**
 * Test.
 */
@Test
public class TCKIsoFields {

    @DataProvider(name="quarter")
    Object[][] data_quarter() {
        return new Object[][] {
                {LocalDate.of(1969, 12, 29), 90, 4},
                {LocalDate.of(1969, 12, 30), 91, 4},
                {LocalDate.of(1969, 12, 31), 92, 4},

                {LocalDate.of(1970, 1, 1), 1, 1},
                {LocalDate.of(1970, 1, 2), 2, 1},
                {LocalDate.of(1970, 2, 28), 59, 1},
                {LocalDate.of(1970, 3, 1), 60, 1},
                {LocalDate.of(1970, 3, 31), 90, 1},

                {LocalDate.of(1970, 4, 1), 1, 2},
                {LocalDate.of(1970, 6, 30), 91, 2},

                {LocalDate.of(1970, 7, 1), 1, 3},
                {LocalDate.of(1970, 9, 30), 92, 3},

                {LocalDate.of(1970, 10, 1), 1, 4},
                {LocalDate.of(1970, 12, 31), 92, 4},

                {LocalDate.of(1972, 2, 28), 59, 1},
                {LocalDate.of(1972, 2, 29), 60, 1},
                {LocalDate.of(1972, 3, 1), 61, 1},
                {LocalDate.of(1972, 3, 31), 91, 1},
        };
    }

    //-----------------------------------------------------------------------
    // DAY_OF_QUARTER
    //-----------------------------------------------------------------------
    @Test(dataProvider = "quarter")
    public void test_DOQ(LocalDate date, int doq, int qoy) {
        assertEquals(IsoFields.DAY_OF_QUARTER.getFrom(date), doq);
        assertEquals(date.get(IsoFields.DAY_OF_QUARTER), doq);
    }

    public void test_DOQ_basics() {
        assertEquals(IsoFields.DAY_OF_QUARTER.isDateBased(), true);
        assertEquals(IsoFields.DAY_OF_QUARTER.isTimeBased(), false);
    }

    //-----------------------------------------------------------------------
    // QUARTER_OF_YEAR
    //-----------------------------------------------------------------------
    @Test(dataProvider = "quarter")
    public void test_QOY(LocalDate date, int doq, int qoy) {
        assertEquals(IsoFields.QUARTER_OF_YEAR.getFrom(date), qoy);
        assertEquals(date.get(IsoFields.QUARTER_OF_YEAR), qoy);
    }

    public void test_QOY_basics() {
        assertEquals(IsoFields.QUARTER_OF_YEAR.isDateBased(), true);
        assertEquals(IsoFields.QUARTER_OF_YEAR.isTimeBased(), false);
    }

    //-----------------------------------------------------------------------
    // parse quarters
    //-----------------------------------------------------------------------
    @Test(dataProvider = "quarter")
    public void test_parse_quarters(LocalDate date, int doq, int qoy) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(YEAR).appendLiteral('-')
                .appendValue(IsoFields.QUARTER_OF_YEAR).appendLiteral('-')
                .appendValue(IsoFields.DAY_OF_QUARTER)
                .toFormatter().withResolverStyle(ResolverStyle.STRICT);
        LocalDate parsed = LocalDate.parse(date.getYear() + "-" + qoy + "-" + doq, f);
        assertEquals(parsed, date);
    }

    @Test(dataProvider = "quarter")
    public void test_parse_quarters_SMART(LocalDate date, int doq, int qoy) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(YEAR).appendLiteral('-')
                .appendValue(IsoFields.QUARTER_OF_YEAR).appendLiteral('-')
                .appendValue(IsoFields.DAY_OF_QUARTER)
                .toFormatter().withResolverStyle(ResolverStyle.SMART);
        LocalDate parsed = LocalDate.parse(date.getYear() + "-" + qoy + "-" + doq, f);
        assertEquals(parsed, date);
    }

    @Test(dataProvider = "quarter")
    public void test_parse_quarters_LENIENT(LocalDate date, int doq, int qoy) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(YEAR).appendLiteral('-')
                .appendValue(IsoFields.QUARTER_OF_YEAR).appendLiteral('-')
                .appendValue(IsoFields.DAY_OF_QUARTER)
                .toFormatter().withResolverStyle(ResolverStyle.LENIENT);
        LocalDate parsed = LocalDate.parse(date.getYear() + "-" + qoy + "-" + doq, f);
        assertEquals(parsed, date);
    }

    //-----------------------------------------------------------------------
    @DataProvider(name="parseLenientQuarter")
    Object[][] data_parseLenientQuarter() {
        return new Object[][] {
                {"2012:0:1", LocalDate.of(2011, 10, 1), false},
                {"2012:5:1", LocalDate.of(2013, 1, 1), false},

                {"2012:1:-1", LocalDate.of(2011, 12, 30), false},
                {"2012:1:0", LocalDate.of(2011, 12, 31), false},
                {"2012:0:0", LocalDate.of(2011, 9, 30), false},

                {"2012:1:92", LocalDate.of(2012, 4, 1), true},
                {"2012:2:92", LocalDate.of(2012, 7, 1), true},
                {"2012:2:93", LocalDate.of(2012, 7, 2), false},
                {"2012:3:93", LocalDate.of(2012, 10, 1), false},
                {"2012:4:93", LocalDate.of(2013, 1, 1), false},
                {"2012:4:182", LocalDate.of(2013, 3, 31), false},
                {"2012:4:183", LocalDate.of(2013, 4, 1), false},

                {"2011:1:91", LocalDate.of(2011, 4, 1), true},
                {"2011:1:92", LocalDate.of(2011, 4, 2), true},
        };
    }

    @Test(dataProvider = "parseLenientQuarter", expectedExceptions = DateTimeParseException.class)
    public void test_parse_parseLenientQuarter_STRICT(String str, LocalDate expected, boolean smart) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(YEAR).appendLiteral(':')
                .appendValue(IsoFields.QUARTER_OF_YEAR).appendLiteral(':')
                .appendValue(IsoFields.DAY_OF_QUARTER)
                .toFormatter().withResolverStyle(ResolverStyle.STRICT);
        LocalDate.parse(str, f);
    }

    @Test(dataProvider = "parseLenientQuarter")
    public void test_parse_parseLenientQuarter_SMART(String str, LocalDate expected, boolean smart) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(YEAR).appendLiteral(':')
                .appendValue(IsoFields.QUARTER_OF_YEAR).appendLiteral(':')
                .appendValue(IsoFields.DAY_OF_QUARTER)
                .toFormatter().withResolverStyle(ResolverStyle.SMART);
        if (smart) {
            LocalDate parsed = LocalDate.parse(str, f);
            assertEquals(parsed, expected);
        } else {
            try {
                LocalDate.parse(str, f);
                fail("Should have failed");
            } catch (DateTimeParseException ex) {
                // expected
            }
        }
    }

    @Test(dataProvider = "parseLenientQuarter")
    public void test_parse_parseLenientQuarter_LENIENT(String str, LocalDate expected, boolean smart) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(YEAR).appendLiteral(':')
                .appendValue(IsoFields.QUARTER_OF_YEAR).appendLiteral(':')
                .appendValue(IsoFields.DAY_OF_QUARTER)
                .toFormatter().withResolverStyle(ResolverStyle.LENIENT);
        LocalDate parsed = LocalDate.parse(str, f);
        assertEquals(parsed, expected);
    }

    //-----------------------------------------------------------------------
    // quarters between
    //-----------------------------------------------------------------------
    @DataProvider(name="quartersBetween")
    Object[][] data_quartersBetween() {
        return new Object[][] {
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 1, 1), 0},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 1, 2), 0},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 2, 1), 0},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 3, 1), 0},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 3, 31), 0},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 4, 1), 1},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 4, 2), 1},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 6, 30), 1},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 7, 1), 2},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 10, 1), 3},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2000, 12, 31), 3},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2001, 1, 1), 4},
                {LocalDate.of(2000, 1, 1), LocalDate.of(2002, 1, 1), 8},

                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 12, 31), 0},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 10, 2), 0},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 10, 1), -1},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 7, 2), -1},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 7, 1), -2},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 4, 2), -2},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 4, 1), -3},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 1, 2), -3},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1999, 1, 1), -4},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1998, 12, 31), -4},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1998, 10, 2), -4},
                {LocalDate.of(2000, 1, 1), LocalDate.of(1998, 10, 1), -5},

                {LocalDate.of(2000, 1, 1), LocalDateTime.of(2001, 4, 5, 0, 0), 5},
        };
    }

    @Test(dataProvider="quartersBetween")
    public void test_quarters_between(LocalDate start, Temporal end, long expected) {
        assertEquals(IsoFields.QUARTER_YEARS.between(start, end), expected);
    }

    @Test(dataProvider="quartersBetween")
    public void test_quarters_between_until(LocalDate start, Temporal end, long expected) {
        assertEquals(start.until(end, IsoFields.QUARTER_YEARS), expected);
    }

    //-----------------------------------------------------------------------
    //-----------------------------------------------------------------------
    //-----------------------------------------------------------------------
    @DataProvider(name="week")
    Object[][] data_week() {
        return new Object[][] {
                {LocalDate.of(1969, 12, 29), MONDAY, 1, 1970},
                {LocalDate.of(2012, 12, 23), SUNDAY, 51, 2012},
                {LocalDate.of(2012, 12, 24), MONDAY, 52, 2012},
                {LocalDate.of(2012, 12, 27), THURSDAY, 52, 2012},
                {LocalDate.of(2012, 12, 28), FRIDAY, 52, 2012},
                {LocalDate.of(2012, 12, 29), SATURDAY, 52, 2012},
                {LocalDate.of(2012, 12, 30), SUNDAY, 52, 2012},
                {LocalDate.of(2012, 12, 31), MONDAY, 1, 2013},
                {LocalDate.of(2013, 1, 1), TUESDAY, 1, 2013},
                {LocalDate.of(2013, 1, 2), WEDNESDAY, 1, 2013},
                {LocalDate.of(2013, 1, 6), SUNDAY, 1, 2013},
                {LocalDate.of(2013, 1, 7), MONDAY, 2, 2013},
        };
    }

    //-----------------------------------------------------------------------
    // WEEK_OF_WEEK_BASED_YEAR
    //-----------------------------------------------------------------------
    @Test(dataProvider="week")
    public void test_WOWBY(LocalDate date, DayOfWeek dow, int week, int wby) {
        assertEquals(date.getDayOfWeek(), dow);
        assertEquals(IsoFields.WEEK_OF_WEEK_BASED_YEAR.getFrom(date), week);
        assertEquals(date.get(IsoFields.WEEK_OF_WEEK_BASED_YEAR), week);
    }

    public void test_WOWBY_basics() {
        assertEquals(IsoFields.WEEK_OF_WEEK_BASED_YEAR.isDateBased(), true);
        assertEquals(IsoFields.WEEK_OF_WEEK_BASED_YEAR.isTimeBased(), false);
    }

    //-----------------------------------------------------------------------
    // WEEK_BASED_YEAR
    //-----------------------------------------------------------------------
    @Test(dataProvider="week")
    public void test_WBY(LocalDate date, DayOfWeek dow, int week, int wby) {
        assertEquals(date.getDayOfWeek(), dow);
        assertEquals(IsoFields.WEEK_BASED_YEAR.getFrom(date), wby);
        assertEquals(date.get(IsoFields.WEEK_BASED_YEAR), wby);
    }

    public void test_WBY_basics() {
        assertEquals(IsoFields.WEEK_BASED_YEAR.isDateBased(), true);
        assertEquals(IsoFields.WEEK_BASED_YEAR.isTimeBased(), false);
    }

    //-----------------------------------------------------------------------
    // parse weeks
    //-----------------------------------------------------------------------
    @Test(dataProvider="week")
    public void test_parse_weeks_STRICT(LocalDate date, DayOfWeek dow, int week, int wby) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(IsoFields.WEEK_BASED_YEAR).appendLiteral('-')
                .appendValue(IsoFields.WEEK_OF_WEEK_BASED_YEAR).appendLiteral('-')
                .appendValue(DAY_OF_WEEK)
                .toFormatter().withResolverStyle(ResolverStyle.STRICT);
        LocalDate parsed = LocalDate.parse(wby + "-" + week + "-" + dow.getValue(), f);
        assertEquals(parsed, date);
    }

    @Test(dataProvider="week")
    public void test_parse_weeks_SMART(LocalDate date, DayOfWeek dow, int week, int wby) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(IsoFields.WEEK_BASED_YEAR).appendLiteral('-')
                .appendValue(IsoFields.WEEK_OF_WEEK_BASED_YEAR).appendLiteral('-')
                .appendValue(DAY_OF_WEEK)
                .toFormatter().withResolverStyle(ResolverStyle.SMART);
        LocalDate parsed = LocalDate.parse(wby + "-" + week + "-" + dow.getValue(), f);
        assertEquals(parsed, date);
    }

    @Test(dataProvider="week")
    public void test_parse_weeks_LENIENT(LocalDate date, DayOfWeek dow, int week, int wby) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(IsoFields.WEEK_BASED_YEAR).appendLiteral('-')
                .appendValue(IsoFields.WEEK_OF_WEEK_BASED_YEAR).appendLiteral('-')
                .appendValue(DAY_OF_WEEK)
                .toFormatter().withResolverStyle(ResolverStyle.LENIENT);
        LocalDate parsed = LocalDate.parse(wby + "-" + week + "-" + dow.getValue(), f);
        assertEquals(parsed, date);
    }

    //-----------------------------------------------------------------------
    @DataProvider(name="parseLenientWeek")
    Object[][] data_parseLenientWeek() {
        return new Object[][] {
                {"2012:52:-1", LocalDate.of(2012, 12, 22), false},
                {"2012:52:0", LocalDate.of(2012, 12, 23), false},
                {"2012:52:8", LocalDate.of(2012, 12, 31), false},
                {"2012:52:9", LocalDate.of(2013, 1, 1), false},

                {"2012:53:1", LocalDate.of(2012, 12, 31), true},
                {"2012:54:1", LocalDate.of(2013, 1, 7), false},

                {"2013:0:1", LocalDate.of(2012, 12, 24), false},
                {"2013:0:0", LocalDate.of(2012, 12, 23), false},
        };
    }

    @Test(dataProvider = "parseLenientWeek", expectedExceptions = DateTimeParseException.class)
    public void test_parse_parseLenientWeek_STRICT(String str, LocalDate expected, boolean smart) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(IsoFields.WEEK_BASED_YEAR).appendLiteral(':')
                .appendValue(IsoFields.WEEK_OF_WEEK_BASED_YEAR).appendLiteral(':')
                .appendValue(DAY_OF_WEEK)
                .toFormatter().withResolverStyle(ResolverStyle.STRICT);
        LocalDate.parse(str, f);
    }

    @Test(dataProvider = "parseLenientWeek")
    public void test_parse_parseLenientWeek_SMART(String str, LocalDate expected, boolean smart) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(IsoFields.WEEK_BASED_YEAR).appendLiteral(':')
                .appendValue(IsoFields.WEEK_OF_WEEK_BASED_YEAR).appendLiteral(':')
                .appendValue(DAY_OF_WEEK)
                .toFormatter().withResolverStyle(ResolverStyle.SMART);
        if (smart) {
            LocalDate parsed = LocalDate.parse(str, f);
            assertEquals(parsed, expected);
        } else {
            try {
                LocalDate.parse(str, f);
                fail("Should have failed");
            } catch (DateTimeParseException ex) {
                // expected
            }
        }
    }

    @Test(dataProvider = "parseLenientWeek")
    public void test_parse_parseLenientWeek_LENIENT(String str, LocalDate expected, boolean smart) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(IsoFields.WEEK_BASED_YEAR).appendLiteral(':')
                .appendValue(IsoFields.WEEK_OF_WEEK_BASED_YEAR).appendLiteral(':')
                .appendValue(DAY_OF_WEEK)
                .toFormatter().withResolverStyle(ResolverStyle.LENIENT);
        LocalDate parsed = LocalDate.parse(str, f);
        assertEquals(parsed, expected);
    }

    //-----------------------------------------------------------------------
    public void test_loop() {
        // loop round at least one 400 year cycle, including before 1970
        LocalDate date = LocalDate.of(1960, 1, 5);  // Tuseday of week 1 1960
        int year = 1960;
        int wby = 1960;
        int weekLen = 52;
        int week = 1;
        while (date.getYear() < 2400) {
            DayOfWeek loopDow = date.getDayOfWeek();
            if (date.getYear() != year) {
                year = date.getYear();
            }
            if (loopDow == MONDAY) {
                week++;
                if ((week == 53 && weekLen == 52) || week == 54) {
                    week = 1;
                    LocalDate firstDayOfWeekBasedYear = date.plusDays(14).withDayOfYear(1);
                    DayOfWeek firstDay = firstDayOfWeekBasedYear.getDayOfWeek();
                    weekLen = (firstDay == THURSDAY || (firstDay == WEDNESDAY && firstDayOfWeekBasedYear.isLeapYear()) ? 53 : 52);
                    wby++;
                }
            }
            assertEquals(IsoFields.WEEK_OF_WEEK_BASED_YEAR.rangeRefinedBy(date), ValueRange.of(1, weekLen), "Failed on " + date + " " + date.getDayOfWeek());
            assertEquals(IsoFields.WEEK_OF_WEEK_BASED_YEAR.getFrom(date), week, "Failed on " + date + " " + date.getDayOfWeek());
            assertEquals(date.get(IsoFields.WEEK_OF_WEEK_BASED_YEAR), week, "Failed on " + date + " " + date.getDayOfWeek());
            assertEquals(IsoFields.WEEK_BASED_YEAR.getFrom(date), wby, "Failed on " + date + " " + date.getDayOfWeek());
            assertEquals(date.get(IsoFields.WEEK_BASED_YEAR), wby, "Failed on " + date + " " + date.getDayOfWeek());
            date = date.plusDays(1);
        }
    }

    // TODO: more tests
}