test/jdk/java/time/test/java/time/TestLocalDate.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2012, 2018, 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.
  */

 /*
  * This file is available under and governed by the GNU General Public
  * License version 2 only, as published by the Free Software Foundation.
  * However, the following notice accompanied the original version of this
  * file:
  *
  * Copyright (c) 2007-2012, 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 test.java.time;

 import static java.time.temporal.ChronoField.YEAR;
 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.assertSame;
 import static org.testng.Assert.assertTrue;

 import java.time.LocalDate;
 import java.time.Month;
 import java.time.temporal.ChronoUnit;
 import java.time.temporal.IsoFields;

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

 /**
  * Test LocalDate.
  */
 @Test
 public class TestLocalDate extends AbstractTest {

     private LocalDate TEST_2007_07_15;

     @BeforeMethod
     public void setUp() {
         TEST_2007_07_15 = LocalDate.of(2007, 7, 15);
     }

     //-----------------------------------------------------------------------
     @Test
     public void test_immutable() {
         assertImmutable(LocalDate.class);
     }

     //-----------------------------------------------------------------------
     // Since plusDays/minusDays actually depends on MJDays, it cannot be used for testing
     private LocalDate next(LocalDate date) {
         int newDayOfMonth = date.getDayOfMonth() + 1;
         if (newDayOfMonth <= date.getMonth().length(isIsoLeap(date.getYear()))) {
             return date.withDayOfMonth(newDayOfMonth);
         }
         date = date.withDayOfMonth(1);
         if (date.getMonth() == Month.DECEMBER) {
             date = date.withYear(date.getYear() + 1);
         }
         return date.with(date.getMonth().plus(1));
     }

     private LocalDate previous(LocalDate date) {
         int newDayOfMonth = date.getDayOfMonth() - 1;
         if (newDayOfMonth > 0) {
             return date.withDayOfMonth(newDayOfMonth);
         }
         date = date.with(date.getMonth().minus(1));
         if (date.getMonth() == Month.DECEMBER) {
             date = date.withYear(date.getYear() - 1);
         }
         return date.withDayOfMonth(date.getMonth().length(isIsoLeap(date.getYear())));
     }

     @Test
     public void test_with_DateTimeField_long_noChange_same() {
         LocalDate t = TEST_2007_07_15.with(YEAR, 2007);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_withYear_int_noChange_same() {
         LocalDate t = TEST_2007_07_15.withYear(2007);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_withMonth_int_noChange_same() {
         LocalDate t = TEST_2007_07_15.withMonth(7);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_withDayOfMonth_noChange_same() {
         LocalDate t = TEST_2007_07_15.withDayOfMonth(15);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_withDayOfYear_noChange_same() {
         LocalDate t = TEST_2007_07_15.withDayOfYear(31 + 28 + 31 + 30 + 31 + 30 + 15);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_plus_Period_zero() {
         LocalDate t = TEST_2007_07_15.plus(MockSimplePeriod.ZERO_DAYS);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_plus_longPeriodUnit_zero() {
         LocalDate t = TEST_2007_07_15.plus(0, ChronoUnit.DAYS);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_plusYears_long_noChange_same() {
         LocalDate t = TEST_2007_07_15.plusYears(0);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_plusMonths_long_noChange_same() {
         LocalDate t = TEST_2007_07_15.plusMonths(0);
         assertSame(t, TEST_2007_07_15);
     }

     //-----------------------------------------------------------------------
     // plusWeeks()
     //-----------------------------------------------------------------------
     @DataProvider(name="samplePlusWeeksSymmetry")
     Object[][] provider_samplePlusWeeksSymmetry() {
         return new Object[][] {
             {LocalDate.of(-1, 1, 1)},
             {LocalDate.of(-1, 2, 28)},
             {LocalDate.of(-1, 3, 1)},
             {LocalDate.of(-1, 12, 31)},
             {LocalDate.of(0, 1, 1)},
             {LocalDate.of(0, 2, 28)},
             {LocalDate.of(0, 2, 29)},
             {LocalDate.of(0, 3, 1)},
             {LocalDate.of(0, 12, 31)},
             {LocalDate.of(2007, 1, 1)},
             {LocalDate.of(2007, 2, 28)},
             {LocalDate.of(2007, 3, 1)},
             {LocalDate.of(2007, 12, 31)},
             {LocalDate.of(2008, 1, 1)},
             {LocalDate.of(2008, 2, 28)},
             {LocalDate.of(2008, 2, 29)},
             {LocalDate.of(2008, 3, 1)},
             {LocalDate.of(2008, 12, 31)},
             {LocalDate.of(2099, 1, 1)},
             {LocalDate.of(2099, 2, 28)},
             {LocalDate.of(2099, 3, 1)},
             {LocalDate.of(2099, 12, 31)},
             {LocalDate.of(2100, 1, 1)},
             {LocalDate.of(2100, 2, 28)},
             {LocalDate.of(2100, 3, 1)},
             {LocalDate.of(2100, 12, 31)},
         };
     }

     @Test(dataProvider="samplePlusWeeksSymmetry")
     public void test_plusWeeks_symmetry(LocalDate reference) {
         for (int weeks = 0; weeks < 365 * 8; weeks++) {
             LocalDate t = reference.plusWeeks(weeks).plusWeeks(-weeks);
             assertEquals(t, reference);

             t = reference.plusWeeks(-weeks).plusWeeks(weeks);
             assertEquals(t, reference);
         }
     }

     @Test
     public void test_plusWeeks_noChange_same() {
         LocalDate t = TEST_2007_07_15.plusWeeks(0);
         assertSame(t, TEST_2007_07_15);
     }

     //-----------------------------------------------------------------------
     // plusDays()
     //-----------------------------------------------------------------------
     @DataProvider(name="samplePlusDaysSymmetry")
     Object[][] provider_samplePlusDaysSymmetry() {
         return new Object[][] {
             {LocalDate.of(-1, 1, 1)},
             {LocalDate.of(-1, 2, 28)},
             {LocalDate.of(-1, 3, 1)},
             {LocalDate.of(-1, 12, 31)},
             {LocalDate.of(0, 1, 1)},
             {LocalDate.of(0, 2, 28)},
             {LocalDate.of(0, 2, 29)},
             {LocalDate.of(0, 3, 1)},
             {LocalDate.of(0, 12, 31)},
             {LocalDate.of(2007, 1, 1)},
             {LocalDate.of(2007, 2, 28)},
             {LocalDate.of(2007, 3, 1)},
             {LocalDate.of(2007, 12, 31)},
             {LocalDate.of(2008, 1, 1)},
             {LocalDate.of(2008, 2, 28)},
             {LocalDate.of(2008, 2, 29)},
             {LocalDate.of(2008, 3, 1)},
             {LocalDate.of(2008, 12, 31)},
             {LocalDate.of(2099, 1, 1)},
             {LocalDate.of(2099, 2, 28)},
             {LocalDate.of(2099, 3, 1)},
             {LocalDate.of(2099, 12, 31)},
             {LocalDate.of(2100, 1, 1)},
             {LocalDate.of(2100, 2, 28)},
             {LocalDate.of(2100, 3, 1)},
             {LocalDate.of(2100, 12, 31)},
         };
     }

     @Test(dataProvider="samplePlusDaysSymmetry")
     public void test_plusDays_symmetry(LocalDate reference) {
         for (int days = 0; days < 365 * 8; days++) {
             LocalDate t = reference.plusDays(days).plusDays(-days);
             assertEquals(t, reference);

             t = reference.plusDays(-days).plusDays(days);
             assertEquals(t, reference);
         }
     }

     @Test
     public void test_plusDays_noChange_same() {
         LocalDate t = TEST_2007_07_15.plusDays(0);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_minus_Period_zero() {
         LocalDate t = TEST_2007_07_15.minus(MockSimplePeriod.ZERO_DAYS);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_minus_longPeriodUnit_zero() {
         LocalDate t = TEST_2007_07_15.minus(0, ChronoUnit.DAYS);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_minusYears_long_noChange_same() {
         LocalDate t = TEST_2007_07_15.minusYears(0);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_minusMonths_long_noChange_same() {
         LocalDate t = TEST_2007_07_15.minusMonths(0);
         assertSame(t, TEST_2007_07_15);
     }

     //-----------------------------------------------------------------------
     // minusWeeks()
     //-----------------------------------------------------------------------
     @DataProvider(name="sampleMinusWeeksSymmetry")
     Object[][] provider_sampleMinusWeeksSymmetry() {
         return new Object[][] {
             {LocalDate.of(-1, 1, 1)},
             {LocalDate.of(-1, 2, 28)},
             {LocalDate.of(-1, 3, 1)},
             {LocalDate.of(-1, 12, 31)},
             {LocalDate.of(0, 1, 1)},
             {LocalDate.of(0, 2, 28)},
             {LocalDate.of(0, 2, 29)},
             {LocalDate.of(0, 3, 1)},
             {LocalDate.of(0, 12, 31)},
             {LocalDate.of(2007, 1, 1)},
             {LocalDate.of(2007, 2, 28)},
             {LocalDate.of(2007, 3, 1)},
             {LocalDate.of(2007, 12, 31)},
             {LocalDate.of(2008, 1, 1)},
             {LocalDate.of(2008, 2, 28)},
             {LocalDate.of(2008, 2, 29)},
             {LocalDate.of(2008, 3, 1)},
             {LocalDate.of(2008, 12, 31)},
             {LocalDate.of(2099, 1, 1)},
             {LocalDate.of(2099, 2, 28)},
             {LocalDate.of(2099, 3, 1)},
             {LocalDate.of(2099, 12, 31)},
             {LocalDate.of(2100, 1, 1)},
             {LocalDate.of(2100, 2, 28)},
             {LocalDate.of(2100, 3, 1)},
             {LocalDate.of(2100, 12, 31)},
         };
     }

     @Test(dataProvider="sampleMinusWeeksSymmetry")
     public void test_minusWeeks_symmetry(LocalDate reference) {
         for (int weeks = 0; weeks < 365 * 8; weeks++) {
             LocalDate t = reference.minusWeeks(weeks).minusWeeks(-weeks);
             assertEquals(t, reference);

             t = reference.minusWeeks(-weeks).minusWeeks(weeks);
             assertEquals(t, reference);
         }
     }

     @Test
     public void test_minusWeeks_noChange_same() {
         LocalDate t = TEST_2007_07_15.minusWeeks(0);
         assertSame(t, TEST_2007_07_15);
     }

     //-----------------------------------------------------------------------
     // minusDays()
     //-----------------------------------------------------------------------
     @DataProvider(name="sampleMinusDaysSymmetry")
     Object[][] provider_sampleMinusDaysSymmetry() {
         return new Object[][] {
             {LocalDate.of(-1, 1, 1)},
             {LocalDate.of(-1, 2, 28)},
             {LocalDate.of(-1, 3, 1)},
             {LocalDate.of(-1, 12, 31)},
             {LocalDate.of(0, 1, 1)},
             {LocalDate.of(0, 2, 28)},
             {LocalDate.of(0, 2, 29)},
             {LocalDate.of(0, 3, 1)},
             {LocalDate.of(0, 12, 31)},
             {LocalDate.of(2007, 1, 1)},
             {LocalDate.of(2007, 2, 28)},
             {LocalDate.of(2007, 3, 1)},
             {LocalDate.of(2007, 12, 31)},
             {LocalDate.of(2008, 1, 1)},
             {LocalDate.of(2008, 2, 28)},
             {LocalDate.of(2008, 2, 29)},
             {LocalDate.of(2008, 3, 1)},
             {LocalDate.of(2008, 12, 31)},
             {LocalDate.of(2099, 1, 1)},
             {LocalDate.of(2099, 2, 28)},
             {LocalDate.of(2099, 3, 1)},
             {LocalDate.of(2099, 12, 31)},
             {LocalDate.of(2100, 1, 1)},
             {LocalDate.of(2100, 2, 28)},
             {LocalDate.of(2100, 3, 1)},
             {LocalDate.of(2100, 12, 31)},
         };
     }

     @Test(dataProvider="sampleMinusDaysSymmetry")
     public void test_minusDays_symmetry(LocalDate reference) {
         for (int days = 0; days < 365 * 8; days++) {
             LocalDate t = reference.minusDays(days).minusDays(-days);
             assertEquals(t, reference);

             t = reference.minusDays(-days).minusDays(days);
             assertEquals(t, reference);
         }
     }

     @Test
     public void test_minusDays_noChange_same() {
         LocalDate t = TEST_2007_07_15.minusDays(0);
         assertSame(t, TEST_2007_07_15);
     }

     @Test
     public void test_toEpochDay_fromMJDays_symmetry() {
         long date_0000_01_01 = -678941 - 40587;

         LocalDate test = LocalDate.of(0, 1, 1);
         for (long i = date_0000_01_01; i < 700000; i++) {
             assertEquals(LocalDate.ofEpochDay(test.toEpochDay()), test);
             test = next(test);
         }
         test = LocalDate.of(0, 1, 1);
         for (long i = date_0000_01_01; i > -2000000; i--) {
             assertEquals(LocalDate.ofEpochDay(test.toEpochDay()), test);
             test = previous(test);
         }
     }

     void doTest_comparisons_LocalDate(LocalDate... localDates) {
         for (int i = 0; i < localDates.length; i++) {
             LocalDate a = localDates[i];
             for (int j = 0; j < localDates.length; j++) {
                 LocalDate b = localDates[j];
                 if (i < j) {
                     assertTrue(a.compareTo(b) < 0, a + " <=> " + b);
                     assertEquals(a.isBefore(b), true, a + " <=> " + b);
                     assertEquals(a.isAfter(b), false, a + " <=> " + b);
                     assertEquals(a.equals(b), false, a + " <=> " + b);
                 } else if (i > j) {
                     assertTrue(a.compareTo(b) > 0, a + " <=> " + b);
                     assertEquals(a.isBefore(b), false, a + " <=> " + b);
                     assertEquals(a.isAfter(b), true, a + " <=> " + b);
                     assertEquals(a.equals(b), false, a + " <=> " + b);
                 } else {
                     assertEquals(a.compareTo(b), 0, a + " <=> " + b);
                     assertEquals(a.isBefore(b), false, a + " <=> " + b);
                     assertEquals(a.isAfter(b), false, a + " <=> " + b);
                     assertEquals(a.equals(b), true, a + " <=> " + b);
                 }
             }
         }
     }

     @DataProvider(name="quarterYearsToAdd")
     Object[][] provider_quarterYearsToAdd() {
         return new Object[][] {
             {Long.valueOf(-1000000000)},
             {Long.valueOf(-256)},
             {Long.valueOf(-255)},
             {Long.valueOf(-1)},
             {Long.valueOf(0)},
             {Long.valueOf(1)},
             {Long.valueOf(255)},
             {Long.valueOf(256)},
             {Long.valueOf(1000000000)},
         };
     }

     @Test(dataProvider="quarterYearsToAdd")
     public void test_plus_QuarterYears(long quarterYears) {
         LocalDate t0 = TEST_2007_07_15
                 .plus(quarterYears, IsoFields.QUARTER_YEARS);
         LocalDate t1 = TEST_2007_07_15
                 .plus(quarterYears, ChronoUnit.MONTHS)
                 .plus(quarterYears, ChronoUnit.MONTHS)
                 .plus(quarterYears, ChronoUnit.MONTHS);
         assertEquals(t0, t1);
     }

     @Test(dataProvider="quarterYearsToAdd")
     public void test_minus_QuarterYears(long quarterYears) {
         LocalDate t0 = TEST_2007_07_15
                 .minus(quarterYears, IsoFields.QUARTER_YEARS);
         LocalDate t1 = TEST_2007_07_15
                 .minus(quarterYears, ChronoUnit.MONTHS)
                 .minus(quarterYears, ChronoUnit.MONTHS)
                 .minus(quarterYears, ChronoUnit.MONTHS);
         assertEquals(t0, t1);
     }
 }
	/*
	* Copyright (c) 2012, 2018, 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.
	*/

	/*
	* This file is available under and governed by the GNU General Public
	* License version 2 only, as published by the Free Software Foundation.
	* However, the following notice accompanied the original version of this
	* file:
	*
	* Copyright (c) 2007-2012, 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 test.java.time;

	import static java.time.temporal.ChronoField.YEAR;
	import static org.testng.Assert.assertEquals;
	import static org.testng.Assert.assertSame;
	import static org.testng.Assert.assertTrue;

	import java.time.LocalDate;
	import java.time.Month;
	import java.time.temporal.ChronoUnit;
	import java.time.temporal.IsoFields;

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

	/**
	* Test LocalDate.
	*/
	@Test
	public class TestLocalDate extends AbstractTest {

	private LocalDate TEST_2007_07_15;

	@BeforeMethod
	public void setUp() {
	TEST_2007_07_15 = LocalDate.of(2007, 7, 15);
	}

	//-----------------------------------------------------------------------
	@Test
	public void test_immutable() {
	assertImmutable(LocalDate.class);
	}

	//-----------------------------------------------------------------------
	// Since plusDays/minusDays actually depends on MJDays, it cannot be used for testing
	private LocalDate next(LocalDate date) {
	int newDayOfMonth = date.getDayOfMonth() + 1;
	if (newDayOfMonth <= date.getMonth().length(isIsoLeap(date.getYear()))) {
	return date.withDayOfMonth(newDayOfMonth);
	}
	date = date.withDayOfMonth(1);
	if (date.getMonth() == Month.DECEMBER) {
	date = date.withYear(date.getYear() + 1);
	}
	return date.with(date.getMonth().plus(1));
	}

	private LocalDate previous(LocalDate date) {
	int newDayOfMonth = date.getDayOfMonth() - 1;
	if (newDayOfMonth > 0) {
	return date.withDayOfMonth(newDayOfMonth);
	}
	date = date.with(date.getMonth().minus(1));
	if (date.getMonth() == Month.DECEMBER) {
	date = date.withYear(date.getYear() - 1);
	}
	return date.withDayOfMonth(date.getMonth().length(isIsoLeap(date.getYear())));
	}

	@Test
	public void test_with_DateTimeField_long_noChange_same() {
	LocalDate t = TEST_2007_07_15.with(YEAR, 2007);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_withYear_int_noChange_same() {
	LocalDate t = TEST_2007_07_15.withYear(2007);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_withMonth_int_noChange_same() {
	LocalDate t = TEST_2007_07_15.withMonth(7);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_withDayOfMonth_noChange_same() {
	LocalDate t = TEST_2007_07_15.withDayOfMonth(15);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_withDayOfYear_noChange_same() {
	LocalDate t = TEST_2007_07_15.withDayOfYear(31 + 28 + 31 + 30 + 31 + 30 + 15);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_plus_Period_zero() {
	LocalDate t = TEST_2007_07_15.plus(MockSimplePeriod.ZERO_DAYS);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_plus_longPeriodUnit_zero() {
	LocalDate t = TEST_2007_07_15.plus(0, ChronoUnit.DAYS);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_plusYears_long_noChange_same() {
	LocalDate t = TEST_2007_07_15.plusYears(0);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_plusMonths_long_noChange_same() {
	LocalDate t = TEST_2007_07_15.plusMonths(0);
	assertSame(t, TEST_2007_07_15);
	}

	//-----------------------------------------------------------------------
	// plusWeeks()
	//-----------------------------------------------------------------------
	@DataProvider(name="samplePlusWeeksSymmetry")
	Object[][] provider_samplePlusWeeksSymmetry() {
	return new Object[][] {
	{LocalDate.of(-1, 1, 1)},
	{LocalDate.of(-1, 2, 28)},
	{LocalDate.of(-1, 3, 1)},
	{LocalDate.of(-1, 12, 31)},
	{LocalDate.of(0, 1, 1)},
	{LocalDate.of(0, 2, 28)},
	{LocalDate.of(0, 2, 29)},
	{LocalDate.of(0, 3, 1)},
	{LocalDate.of(0, 12, 31)},
	{LocalDate.of(2007, 1, 1)},
	{LocalDate.of(2007, 2, 28)},
	{LocalDate.of(2007, 3, 1)},
	{LocalDate.of(2007, 12, 31)},
	{LocalDate.of(2008, 1, 1)},
	{LocalDate.of(2008, 2, 28)},
	{LocalDate.of(2008, 2, 29)},
	{LocalDate.of(2008, 3, 1)},
	{LocalDate.of(2008, 12, 31)},
	{LocalDate.of(2099, 1, 1)},
	{LocalDate.of(2099, 2, 28)},
	{LocalDate.of(2099, 3, 1)},
	{LocalDate.of(2099, 12, 31)},
	{LocalDate.of(2100, 1, 1)},
	{LocalDate.of(2100, 2, 28)},
	{LocalDate.of(2100, 3, 1)},
	{LocalDate.of(2100, 12, 31)},
	};
	}

	@Test(dataProvider="samplePlusWeeksSymmetry")
	public void test_plusWeeks_symmetry(LocalDate reference) {
	for (int weeks = 0; weeks < 365 * 8; weeks++) {
	LocalDate t = reference.plusWeeks(weeks).plusWeeks(-weeks);
	assertEquals(t, reference);

	t = reference.plusWeeks(-weeks).plusWeeks(weeks);
	assertEquals(t, reference);
	}
	}

	@Test
	public void test_plusWeeks_noChange_same() {
	LocalDate t = TEST_2007_07_15.plusWeeks(0);
	assertSame(t, TEST_2007_07_15);
	}

	//-----------------------------------------------------------------------
	// plusDays()
	//-----------------------------------------------------------------------
	@DataProvider(name="samplePlusDaysSymmetry")
	Object[][] provider_samplePlusDaysSymmetry() {
	return new Object[][] {
	{LocalDate.of(-1, 1, 1)},
	{LocalDate.of(-1, 2, 28)},
	{LocalDate.of(-1, 3, 1)},
	{LocalDate.of(-1, 12, 31)},
	{LocalDate.of(0, 1, 1)},
	{LocalDate.of(0, 2, 28)},
	{LocalDate.of(0, 2, 29)},
	{LocalDate.of(0, 3, 1)},
	{LocalDate.of(0, 12, 31)},
	{LocalDate.of(2007, 1, 1)},
	{LocalDate.of(2007, 2, 28)},
	{LocalDate.of(2007, 3, 1)},
	{LocalDate.of(2007, 12, 31)},
	{LocalDate.of(2008, 1, 1)},
	{LocalDate.of(2008, 2, 28)},
	{LocalDate.of(2008, 2, 29)},
	{LocalDate.of(2008, 3, 1)},
	{LocalDate.of(2008, 12, 31)},
	{LocalDate.of(2099, 1, 1)},
	{LocalDate.of(2099, 2, 28)},
	{LocalDate.of(2099, 3, 1)},
	{LocalDate.of(2099, 12, 31)},
	{LocalDate.of(2100, 1, 1)},
	{LocalDate.of(2100, 2, 28)},
	{LocalDate.of(2100, 3, 1)},
	{LocalDate.of(2100, 12, 31)},
	};
	}

	@Test(dataProvider="samplePlusDaysSymmetry")
	public void test_plusDays_symmetry(LocalDate reference) {
	for (int days = 0; days < 365 * 8; days++) {
	LocalDate t = reference.plusDays(days).plusDays(-days);
	assertEquals(t, reference);

	t = reference.plusDays(-days).plusDays(days);
	assertEquals(t, reference);
	}
	}

	@Test
	public void test_plusDays_noChange_same() {
	LocalDate t = TEST_2007_07_15.plusDays(0);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_minus_Period_zero() {
	LocalDate t = TEST_2007_07_15.minus(MockSimplePeriod.ZERO_DAYS);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_minus_longPeriodUnit_zero() {
	LocalDate t = TEST_2007_07_15.minus(0, ChronoUnit.DAYS);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_minusYears_long_noChange_same() {
	LocalDate t = TEST_2007_07_15.minusYears(0);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_minusMonths_long_noChange_same() {
	LocalDate t = TEST_2007_07_15.minusMonths(0);
	assertSame(t, TEST_2007_07_15);
	}

	//-----------------------------------------------------------------------
	// minusWeeks()
	//-----------------------------------------------------------------------
	@DataProvider(name="sampleMinusWeeksSymmetry")
	Object[][] provider_sampleMinusWeeksSymmetry() {
	return new Object[][] {
	{LocalDate.of(-1, 1, 1)},
	{LocalDate.of(-1, 2, 28)},
	{LocalDate.of(-1, 3, 1)},
	{LocalDate.of(-1, 12, 31)},
	{LocalDate.of(0, 1, 1)},
	{LocalDate.of(0, 2, 28)},
	{LocalDate.of(0, 2, 29)},
	{LocalDate.of(0, 3, 1)},
	{LocalDate.of(0, 12, 31)},
	{LocalDate.of(2007, 1, 1)},
	{LocalDate.of(2007, 2, 28)},
	{LocalDate.of(2007, 3, 1)},
	{LocalDate.of(2007, 12, 31)},
	{LocalDate.of(2008, 1, 1)},
	{LocalDate.of(2008, 2, 28)},
	{LocalDate.of(2008, 2, 29)},
	{LocalDate.of(2008, 3, 1)},
	{LocalDate.of(2008, 12, 31)},
	{LocalDate.of(2099, 1, 1)},
	{LocalDate.of(2099, 2, 28)},
	{LocalDate.of(2099, 3, 1)},
	{LocalDate.of(2099, 12, 31)},
	{LocalDate.of(2100, 1, 1)},
	{LocalDate.of(2100, 2, 28)},
	{LocalDate.of(2100, 3, 1)},
	{LocalDate.of(2100, 12, 31)},
	};
	}

	@Test(dataProvider="sampleMinusWeeksSymmetry")
	public void test_minusWeeks_symmetry(LocalDate reference) {
	for (int weeks = 0; weeks < 365 * 8; weeks++) {
	LocalDate t = reference.minusWeeks(weeks).minusWeeks(-weeks);
	assertEquals(t, reference);

	t = reference.minusWeeks(-weeks).minusWeeks(weeks);
	assertEquals(t, reference);
	}
	}

	@Test
	public void test_minusWeeks_noChange_same() {
	LocalDate t = TEST_2007_07_15.minusWeeks(0);
	assertSame(t, TEST_2007_07_15);
	}

	//-----------------------------------------------------------------------
	// minusDays()
	//-----------------------------------------------------------------------
	@DataProvider(name="sampleMinusDaysSymmetry")
	Object[][] provider_sampleMinusDaysSymmetry() {
	return new Object[][] {
	{LocalDate.of(-1, 1, 1)},
	{LocalDate.of(-1, 2, 28)},
	{LocalDate.of(-1, 3, 1)},
	{LocalDate.of(-1, 12, 31)},
	{LocalDate.of(0, 1, 1)},
	{LocalDate.of(0, 2, 28)},
	{LocalDate.of(0, 2, 29)},
	{LocalDate.of(0, 3, 1)},
	{LocalDate.of(0, 12, 31)},
	{LocalDate.of(2007, 1, 1)},
	{LocalDate.of(2007, 2, 28)},
	{LocalDate.of(2007, 3, 1)},
	{LocalDate.of(2007, 12, 31)},
	{LocalDate.of(2008, 1, 1)},
	{LocalDate.of(2008, 2, 28)},
	{LocalDate.of(2008, 2, 29)},
	{LocalDate.of(2008, 3, 1)},
	{LocalDate.of(2008, 12, 31)},
	{LocalDate.of(2099, 1, 1)},
	{LocalDate.of(2099, 2, 28)},
	{LocalDate.of(2099, 3, 1)},
	{LocalDate.of(2099, 12, 31)},
	{LocalDate.of(2100, 1, 1)},
	{LocalDate.of(2100, 2, 28)},
	{LocalDate.of(2100, 3, 1)},
	{LocalDate.of(2100, 12, 31)},
	};
	}

	@Test(dataProvider="sampleMinusDaysSymmetry")
	public void test_minusDays_symmetry(LocalDate reference) {
	for (int days = 0; days < 365 * 8; days++) {
	LocalDate t = reference.minusDays(days).minusDays(-days);
	assertEquals(t, reference);

	t = reference.minusDays(-days).minusDays(days);
	assertEquals(t, reference);
	}
	}

	@Test
	public void test_minusDays_noChange_same() {
	LocalDate t = TEST_2007_07_15.minusDays(0);
	assertSame(t, TEST_2007_07_15);
	}

	@Test
	public void test_toEpochDay_fromMJDays_symmetry() {
	long date_0000_01_01 = -678941 - 40587;

	LocalDate test = LocalDate.of(0, 1, 1);
	for (long i = date_0000_01_01; i < 700000; i++) {
	assertEquals(LocalDate.ofEpochDay(test.toEpochDay()), test);
	test = next(test);
	}
	test = LocalDate.of(0, 1, 1);
	for (long i = date_0000_01_01; i > -2000000; i--) {
	assertEquals(LocalDate.ofEpochDay(test.toEpochDay()), test);
	test = previous(test);
	}
	}

	void doTest_comparisons_LocalDate(LocalDate... localDates) {
	for (int i = 0; i < localDates.length; i++) {
	LocalDate a = localDates[i];
	for (int j = 0; j < localDates.length; j++) {
	LocalDate b = localDates[j];
	if (i < j) {
	assertTrue(a.compareTo(b) < 0, a + " <=> " + b);
	assertEquals(a.isBefore(b), true, a + " <=> " + b);
	assertEquals(a.isAfter(b), false, a + " <=> " + b);
	assertEquals(a.equals(b), false, a + " <=> " + b);
	} else if (i > j) {
	assertTrue(a.compareTo(b) > 0, a + " <=> " + b);
	assertEquals(a.isBefore(b), false, a + " <=> " + b);
	assertEquals(a.isAfter(b), true, a + " <=> " + b);
	assertEquals(a.equals(b), false, a + " <=> " + b);
	} else {
	assertEquals(a.compareTo(b), 0, a + " <=> " + b);
	assertEquals(a.isBefore(b), false, a + " <=> " + b);
	assertEquals(a.isAfter(b), false, a + " <=> " + b);
	assertEquals(a.equals(b), true, a + " <=> " + b);
	}
	}
	}
	}

	@DataProvider(name="quarterYearsToAdd")
	Object[][] provider_quarterYearsToAdd() {
	return new Object[][] {
	{Long.valueOf(-1000000000)},
	{Long.valueOf(-256)},
	{Long.valueOf(-255)},
	{Long.valueOf(-1)},
	{Long.valueOf(0)},
	{Long.valueOf(1)},
	{Long.valueOf(255)},
	{Long.valueOf(256)},
	{Long.valueOf(1000000000)},
	};
	}

	@Test(dataProvider="quarterYearsToAdd")
	public void test_plus_QuarterYears(long quarterYears) {
	LocalDate t0 = TEST_2007_07_15
	.plus(quarterYears, IsoFields.QUARTER_YEARS);
	LocalDate t1 = TEST_2007_07_15
	.plus(quarterYears, ChronoUnit.MONTHS)
	.plus(quarterYears, ChronoUnit.MONTHS)
	.plus(quarterYears, ChronoUnit.MONTHS);
	assertEquals(t0, t1);
	}

	@Test(dataProvider="quarterYearsToAdd")
	public void test_minus_QuarterYears(long quarterYears) {
	LocalDate t0 = TEST_2007_07_15
	.minus(quarterYears, IsoFields.QUARTER_YEARS);
	LocalDate t1 = TEST_2007_07_15
	.minus(quarterYears, ChronoUnit.MONTHS)
	.minus(quarterYears, ChronoUnit.MONTHS)
	.minus(quarterYears, ChronoUnit.MONTHS);
	assertEquals(t0, t1);
	}
	}