test/java/time/tck/java/time/TestIsoChronology.java

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  42  *    and/or other materials provided with the distribution.
  43  *
  44  *  * Neither the name of JSR-310 nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  49  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  50  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  51  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  52  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  53  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  54  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  55  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  56  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  57  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  58  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  59  */
  60 package tck.java.time;
  61 
  62 import static java.time.chrono.IsoChronology.ERA_BCE;
  63 import static java.time.chrono.IsoChronology.ERA_CE;
  64 import static java.time.temporal.ChronoField.ERA;
  65 import static java.time.temporal.ChronoField.YEAR;
  66 import static java.time.temporal.ChronoField.YEAR_OF_ERA;
  67 import static org.testng.Assert.assertEquals;
  68 import static org.testng.Assert.assertFalse;
  69 import static org.testng.Assert.assertNotNull;
  70 import static org.testng.Assert.assertTrue;
  71 
  72 import java.time.DateTimeException;
  73 import java.time.LocalDate;
  74 import java.time.LocalDateTime;
  75 import java.time.Month;
  76 import java.time.temporal.Adjusters;
  77 import java.time.temporal.ChronoField;
  78 import java.time.chrono.HijrahChronology;
  79 import java.time.chrono.Chronology;
  80 import java.time.chrono.ChronoLocalDate;
  81 import java.time.chrono.Era;


  82 import java.time.chrono.IsoChronology;



  83 
  84 import org.testng.Assert;
  85 import org.testng.annotations.DataProvider;
  86 import org.testng.annotations.Test;
  87 
  88 /**
  89  * Test.
  90  */
  91 @Test
  92 public class TestIsoChronology {
  93 
  94     //-----------------------------------------------------------------------
  95     // Chronology.ofName("ISO")  Lookup by name
  96     //-----------------------------------------------------------------------
  97     @Test(groups={"tck"})
  98     public void test_chrono_byName() {
  99         Chronology c = IsoChronology.INSTANCE;
 100         Chronology test = Chronology.of("ISO");
 101         Assert.assertNotNull(test, "The ISO calendar could not be found byName");
 102         Assert.assertEquals(test.getId(), "ISO", "ID mismatch");
 103         Assert.assertEquals(test.getCalendarType(), "iso8601", "Type mismatch");
 104         Assert.assertEquals(test, c);
 105     }
 106 
 107     //-----------------------------------------------------------------------
 108     // Lookup by Singleton
 109     //-----------------------------------------------------------------------
 110     @Test(groups="tck")
 111     public void instanceNotNull() {
 112         assertNotNull(IsoChronology.INSTANCE);
 113     }
 114 
 115     //-----------------------------------------------------------------------
 116     // Era creation
 117     //-----------------------------------------------------------------------
 118     @Test(groups="tck")
 119     public void test_eraOf() {
 120         assertEquals(IsoChronology.INSTANCE.eraOf(0), ERA_BCE);
 121         assertEquals(IsoChronology.INSTANCE.eraOf(1), ERA_CE);
 122     }
 123 
 124     //-----------------------------------------------------------------------
 125     // creation, toLocalDate()
 126     //-----------------------------------------------------------------------
 127     @DataProvider(name="samples")
 128     Object[][] data_samples() {
 129         return new Object[][] {
 130             {IsoChronology.INSTANCE.date(1, 7, 8), LocalDate.of(1, 7, 8)},
 131             {IsoChronology.INSTANCE.date(1, 7, 20), LocalDate.of(1, 7, 20)},
 132             {IsoChronology.INSTANCE.date(1, 7, 21), LocalDate.of(1, 7, 21)},
 133 
 134             {IsoChronology.INSTANCE.date(2, 7, 8), LocalDate.of(2, 7, 8)},
 135             {IsoChronology.INSTANCE.date(3, 6, 27), LocalDate.of(3, 6, 27)},
 136             {IsoChronology.INSTANCE.date(3, 5, 23), LocalDate.of(3, 5, 23)},
 137             {IsoChronology.INSTANCE.date(4, 6, 16), LocalDate.of(4, 6, 16)},
 138             {IsoChronology.INSTANCE.date(4, 7, 3), LocalDate.of(4, 7, 3)},
 139             {IsoChronology.INSTANCE.date(4, 7, 4), LocalDate.of(4, 7, 4)},
 140             {IsoChronology.INSTANCE.date(5, 1, 1), LocalDate.of(5, 1, 1)},
 141             {IsoChronology.INSTANCE.date(1727, 3, 3), LocalDate.of(1727, 3, 3)},
 142             {IsoChronology.INSTANCE.date(1728, 10, 28), LocalDate.of(1728, 10, 28)},
 143             {IsoChronology.INSTANCE.date(2012, 10, 29), LocalDate.of(2012, 10, 29)},
 144         };
 145     }
 146 
 147     @Test(dataProvider="samples", groups={"tck"})
 148     public void test_toLocalDate(LocalDate isoDate, LocalDate iso) {
 149         assertEquals(LocalDate.from(isoDate), iso);
 150     }
 151 
 152     @Test(dataProvider="samples", groups={"tck"})
 153     public void test_fromCalendrical(LocalDate isoDate, LocalDate iso) {
 154         assertEquals(IsoChronology.INSTANCE.date(iso), isoDate);
 155     }
 156 
 157     @DataProvider(name="badDates")
 158     Object[][] data_badDates() {
 159         return new Object[][] {
 160             {2012, 0, 0},
 161 
 162             {2012, -1, 1},
 163             {2012, 0, 1},
 164             {2012, 14, 1},
 165             {2012, 15, 1},
 166 
 167             {2012, 1, -1},
 168             {2012, 1, 0},
 169             {2012, 1, 32},
 170 
 171             {2012, 12, -1},
 172             {2012, 12, 0},
 173             {2012, 12, 32},
 174         };
 175     }
 176 
 177     @Test(dataProvider="badDates", groups={"tck"}, expectedExceptions=DateTimeException.class)
 178     public void test_badDates(int year, int month, int dom) {
 179         IsoChronology.INSTANCE.date(year, month, dom);
 180     }
 181 
 182     @Test(groups="tck")
 183     public void test_date_withEra() {
 184         int year = 5;
 185         int month = 5;
 186         int dayOfMonth = 5;
 187         LocalDate test = IsoChronology.INSTANCE.date(ERA_BCE, year, month, dayOfMonth);
 188         assertEquals(test.getEra(), ERA_BCE);
 189         assertEquals(test.get(ChronoField.YEAR_OF_ERA), year);
 190         assertEquals(test.get(ChronoField.MONTH_OF_YEAR), month);
 191         assertEquals(test.get(ChronoField.DAY_OF_MONTH), dayOfMonth);
 192 
 193         assertEquals(test.get(YEAR), 1 + (-1 * year));
 194         assertEquals(test.get(ERA), 0);
 195         assertEquals(test.get(YEAR_OF_ERA), year);
 196     }
 197 
 198     @SuppressWarnings({ "unchecked", "rawtypes" })
 199     @Test(expectedExceptions=DateTimeException.class, groups="tck")
 200     public void test_date_withEra_withWrongEra() {
 201         IsoChronology.INSTANCE.date((Era) HijrahChronology.ERA_AH, 1, 1, 1);
 202     }
 203 
 204     //-----------------------------------------------------------------------
 205     // with(DateTimeAdjuster)
 206     //-----------------------------------------------------------------------
 207     @Test(groups={"tck"})
 208     public void test_adjust1() {
 209         LocalDate base = IsoChronology.INSTANCE.date(1728, 10, 28);
 210         LocalDate test = base.with(Adjusters.lastDayOfMonth());
 211         assertEquals(test, IsoChronology.INSTANCE.date(1728, 10, 31));
 212     }
 213 
 214     @Test(groups={"tck"})
 215     public void test_adjust2() {
 216         LocalDate base = IsoChronology.INSTANCE.date(1728, 12, 2);
 217         LocalDate test = base.with(Adjusters.lastDayOfMonth());
 218         assertEquals(test, IsoChronology.INSTANCE.date(1728, 12, 31));
 219     }
 220 
 221     //-----------------------------------------------------------------------
 222     // ISODate.with(Local*)
 223     //-----------------------------------------------------------------------
 224     @Test(groups={"tck"})
 225     public void test_adjust_toLocalDate() {
 226         LocalDate isoDate = IsoChronology.INSTANCE.date(1726, 1, 4);
 227         LocalDate test = isoDate.with(LocalDate.of(2012, 7, 6));
 228         assertEquals(test, IsoChronology.INSTANCE.date(2012, 7, 6));
 229     }
 230 
 231     @Test(groups={"tck"})
 232     public void test_adjust_toMonth() {
 233         LocalDate isoDate = IsoChronology.INSTANCE.date(1726, 1, 4);
 234         assertEquals(IsoChronology.INSTANCE.date(1726, 4, 4), isoDate.with(Month.APRIL));
 235     }
 236 
 237     //-----------------------------------------------------------------------
 238     // LocalDate.with(ISODate)
 239     //-----------------------------------------------------------------------
 240     @Test(groups={"tck"})
 241     public void test_LocalDate_adjustToISODate() {
 242         LocalDate isoDate = IsoChronology.INSTANCE.date(1728, 10, 29);
 243         LocalDate test = LocalDate.MIN.with(isoDate);
 244         assertEquals(test, LocalDate.of(1728, 10, 29));
 245     }
 246 
 247     @Test(groups={"tck"})
 248     public void test_LocalDateTime_adjustToISODate() {
 249         LocalDate isoDate = IsoChronology.INSTANCE.date(1728, 10, 29);
 250         LocalDateTime test = LocalDateTime.MIN.with(isoDate);
 251         assertEquals(test, LocalDateTime.of(1728, 10, 29, 0, 0));
 252     }
 253 
 254     //-----------------------------------------------------------------------
 255     // isLeapYear()
 256     //-----------------------------------------------------------------------
 257     @DataProvider(name="leapYears")
 258     Object[][] leapYearInformation() {
 259         return new Object[][] {
 260                 {2000, true},
 261                 {1996, true},
 262                 {1600, true},
 263 
 264                 {1900, false},
 265                 {2100, false},
 266         };
 267     }
 268 
 269     @Test(dataProvider="leapYears", groups="tck")
 270     public void test_isLeapYear(int year, boolean isLeapYear) {
 271         assertEquals(IsoChronology.INSTANCE.isLeapYear(year), isLeapYear);
 272     }
 273 
 274     //-----------------------------------------------------------------------
 275     // toString()
 276     //-----------------------------------------------------------------------
 277     @Test(groups="tck")
 278     public void test_now() {
 279         assertEquals(LocalDate.from(IsoChronology.INSTANCE.dateNow()), LocalDate.now());
 280     }
 281 
 282     //-----------------------------------------------------------------------
 283     // toString()
 284     //-----------------------------------------------------------------------
 285     @DataProvider(name="toString")
 286     Object[][] data_toString() {
 287         return new Object[][] {
 288             {IsoChronology.INSTANCE.date(1, 1, 1), "0001-01-01"},
 289             {IsoChronology.INSTANCE.date(1728, 10, 28), "1728-10-28"},
 290             {IsoChronology.INSTANCE.date(1728, 10, 29), "1728-10-29"},
 291             {IsoChronology.INSTANCE.date(1727, 12, 5), "1727-12-05"},
 292             {IsoChronology.INSTANCE.date(1727, 12, 6), "1727-12-06"},
 293         };
 294     }
 295 
 296     @Test(dataProvider="toString", groups={"tck"})
 297     public void test_toString(LocalDate isoDate, String expected) {
 298         assertEquals(isoDate.toString(), expected);
 299     }
 300 
 301     //-----------------------------------------------------------------------
 302     // equals()
 303     //-----------------------------------------------------------------------
 304     @Test(groups="tck")
 305     public void test_equals_true() {
 306         assertTrue(IsoChronology.INSTANCE.equals(IsoChronology.INSTANCE));
 307     }
 308 
 309     @Test(groups="tck")
 310     public void test_equals_false() {
 311         assertFalse(IsoChronology.INSTANCE.equals(HijrahChronology.INSTANCE));
 312     }
 313 
 314 }


  42  *    and/or other materials provided with the distribution.
  43  *
  44  *  * Neither the name of JSR-310 nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  49  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  50  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  51  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  52  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  53  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  54  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  55  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  56  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  57  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  58  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  59  */
  60 package tck.java.time;
  61 
  62 import static java.time.chrono.IsoEra.BCE;
  63 import static java.time.chrono.IsoEra.CE;
  64 import static java.time.temporal.ChronoField.ERA;
  65 import static java.time.temporal.ChronoField.YEAR;
  66 import static java.time.temporal.ChronoField.YEAR_OF_ERA;
  67 import static org.testng.Assert.assertEquals;
  68 import static org.testng.Assert.assertFalse;
  69 import static org.testng.Assert.assertNotNull;
  70 import static org.testng.Assert.assertTrue;
  71 
  72 import java.time.DateTimeException;
  73 import java.time.LocalDate;
  74 import java.time.LocalDateTime;
  75 import java.time.Month;



  76 import java.time.chrono.Chronology;

  77 import java.time.chrono.Era;
  78 import java.time.chrono.HijrahChronology;
  79 import java.time.chrono.HijrahEra;
  80 import java.time.chrono.IsoChronology;
  81 import java.time.chrono.IsoEra;
  82 import java.time.temporal.ChronoField;
  83 import java.time.temporal.TemporalAdjuster;
  84 
  85 import org.testng.Assert;
  86 import org.testng.annotations.DataProvider;
  87 import org.testng.annotations.Test;
  88 
  89 /**
  90  * Test.
  91  */
  92 @Test
  93 public class TestIsoChronology {
  94 
  95     //-----------------------------------------------------------------------
  96     // Chronology.ofName("ISO")  Lookup by name
  97     //-----------------------------------------------------------------------
  98     @Test
  99     public void test_chrono_byName() {
 100         Chronology c = IsoChronology.INSTANCE;
 101         Chronology test = Chronology.of("ISO");
 102         Assert.assertNotNull(test, "The ISO calendar could not be found byName");
 103         Assert.assertEquals(test.getId(), "ISO", "ID mismatch");
 104         Assert.assertEquals(test.getCalendarType(), "iso8601", "Type mismatch");
 105         Assert.assertEquals(test, c);
 106     }
 107 
 108     //-----------------------------------------------------------------------
 109     // Lookup by Singleton
 110     //-----------------------------------------------------------------------
 111     @Test
 112     public void instanceNotNull() {
 113         assertNotNull(IsoChronology.INSTANCE);
 114     }
 115 
 116     //-----------------------------------------------------------------------
 117     // Era creation
 118     //-----------------------------------------------------------------------
 119     @Test
 120     public void test_eraOf() {
 121         assertEquals(IsoChronology.INSTANCE.eraOf(0), BCE);
 122         assertEquals(IsoChronology.INSTANCE.eraOf(1), CE);
 123     }
 124 
 125     //-----------------------------------------------------------------------
 126     // creation, toLocalDate()
 127     //-----------------------------------------------------------------------
 128     @DataProvider(name="samples")
 129     Object[][] data_samples() {
 130         return new Object[][] {
 131             {IsoChronology.INSTANCE.date(1, 7, 8), LocalDate.of(1, 7, 8)},
 132             {IsoChronology.INSTANCE.date(1, 7, 20), LocalDate.of(1, 7, 20)},
 133             {IsoChronology.INSTANCE.date(1, 7, 21), LocalDate.of(1, 7, 21)},
 134 
 135             {IsoChronology.INSTANCE.date(2, 7, 8), LocalDate.of(2, 7, 8)},
 136             {IsoChronology.INSTANCE.date(3, 6, 27), LocalDate.of(3, 6, 27)},
 137             {IsoChronology.INSTANCE.date(3, 5, 23), LocalDate.of(3, 5, 23)},
 138             {IsoChronology.INSTANCE.date(4, 6, 16), LocalDate.of(4, 6, 16)},
 139             {IsoChronology.INSTANCE.date(4, 7, 3), LocalDate.of(4, 7, 3)},
 140             {IsoChronology.INSTANCE.date(4, 7, 4), LocalDate.of(4, 7, 4)},
 141             {IsoChronology.INSTANCE.date(5, 1, 1), LocalDate.of(5, 1, 1)},
 142             {IsoChronology.INSTANCE.date(1727, 3, 3), LocalDate.of(1727, 3, 3)},
 143             {IsoChronology.INSTANCE.date(1728, 10, 28), LocalDate.of(1728, 10, 28)},
 144             {IsoChronology.INSTANCE.date(2012, 10, 29), LocalDate.of(2012, 10, 29)},
 145         };
 146     }
 147 
 148     @Test(dataProvider="samples")
 149     public void test_toLocalDate(LocalDate isoDate, LocalDate iso) {
 150         assertEquals(LocalDate.from(isoDate), iso);
 151     }
 152 
 153     @Test(dataProvider="samples")
 154     public void test_fromCalendrical(LocalDate isoDate, LocalDate iso) {
 155         assertEquals(IsoChronology.INSTANCE.date(iso), isoDate);
 156     }
 157 
 158     @DataProvider(name="badDates")
 159     Object[][] data_badDates() {
 160         return new Object[][] {
 161             {2012, 0, 0},
 162 
 163             {2012, -1, 1},
 164             {2012, 0, 1},
 165             {2012, 14, 1},
 166             {2012, 15, 1},
 167 
 168             {2012, 1, -1},
 169             {2012, 1, 0},
 170             {2012, 1, 32},
 171 
 172             {2012, 12, -1},
 173             {2012, 12, 0},
 174             {2012, 12, 32},
 175         };
 176     }
 177 
 178     @Test(dataProvider="badDates", expectedExceptions=DateTimeException.class)
 179     public void test_badDates(int year, int month, int dom) {
 180         IsoChronology.INSTANCE.date(year, month, dom);
 181     }
 182 
 183     @Test
 184     public void test_date_withEra() {
 185         int year = 5;
 186         int month = 5;
 187         int dayOfMonth = 5;
 188         LocalDate test = IsoChronology.INSTANCE.date(IsoEra.BCE, year, month, dayOfMonth);
 189         assertEquals(test.getEra(), IsoEra.BCE);
 190         assertEquals(test.get(ChronoField.YEAR_OF_ERA), year);
 191         assertEquals(test.get(ChronoField.MONTH_OF_YEAR), month);
 192         assertEquals(test.get(ChronoField.DAY_OF_MONTH), dayOfMonth);
 193 
 194         assertEquals(test.get(YEAR), 1 + (-1 * year));
 195         assertEquals(test.get(ERA), 0);
 196         assertEquals(test.get(YEAR_OF_ERA), year);
 197     }
 198 
 199     @SuppressWarnings({ "unchecked", "rawtypes" })
 200     @Test(expectedExceptions=ClassCastException.class)
 201     public void test_date_withEra_withWrongEra() {
 202         IsoChronology.INSTANCE.date((Era) HijrahEra.AH, 1, 1, 1);
 203     }
 204 
 205     //-----------------------------------------------------------------------
 206     // with(DateTimeAdjuster)
 207     //-----------------------------------------------------------------------
 208     @Test
 209     public void test_adjust1() {
 210         LocalDate base = IsoChronology.INSTANCE.date(1728, 10, 28);
 211         LocalDate test = base.with(TemporalAdjuster.lastDayOfMonth());
 212         assertEquals(test, IsoChronology.INSTANCE.date(1728, 10, 31));
 213     }
 214 
 215     @Test
 216     public void test_adjust2() {
 217         LocalDate base = IsoChronology.INSTANCE.date(1728, 12, 2);
 218         LocalDate test = base.with(TemporalAdjuster.lastDayOfMonth());
 219         assertEquals(test, IsoChronology.INSTANCE.date(1728, 12, 31));
 220     }
 221 
 222     //-----------------------------------------------------------------------
 223     // ISODate.with(Local*)
 224     //-----------------------------------------------------------------------
 225     @Test
 226     public void test_adjust_toLocalDate() {
 227         LocalDate isoDate = IsoChronology.INSTANCE.date(1726, 1, 4);
 228         LocalDate test = isoDate.with(LocalDate.of(2012, 7, 6));
 229         assertEquals(test, IsoChronology.INSTANCE.date(2012, 7, 6));
 230     }
 231 
 232     @Test
 233     public void test_adjust_toMonth() {
 234         LocalDate isoDate = IsoChronology.INSTANCE.date(1726, 1, 4);
 235         assertEquals(IsoChronology.INSTANCE.date(1726, 4, 4), isoDate.with(Month.APRIL));
 236     }
 237 
 238     //-----------------------------------------------------------------------
 239     // LocalDate.with(ISODate)
 240     //-----------------------------------------------------------------------
 241     @Test
 242     public void test_LocalDate_adjustToISODate() {
 243         LocalDate isoDate = IsoChronology.INSTANCE.date(1728, 10, 29);
 244         LocalDate test = LocalDate.MIN.with(isoDate);
 245         assertEquals(test, LocalDate.of(1728, 10, 29));
 246     }
 247 
 248     @Test
 249     public void test_LocalDateTime_adjustToISODate() {
 250         LocalDate isoDate = IsoChronology.INSTANCE.date(1728, 10, 29);
 251         LocalDateTime test = LocalDateTime.MIN.with(isoDate);
 252         assertEquals(test, LocalDateTime.of(1728, 10, 29, 0, 0));
 253     }
 254 
 255     //-----------------------------------------------------------------------
 256     // isLeapYear()
 257     //-----------------------------------------------------------------------
 258     @DataProvider(name="leapYears")
 259     Object[][] leapYearInformation() {
 260         return new Object[][] {
 261                 {2000, true},
 262                 {1996, true},
 263                 {1600, true},
 264 
 265                 {1900, false},
 266                 {2100, false},
 267         };
 268     }
 269 
 270     @Test(dataProvider="leapYears")
 271     public void test_isLeapYear(int year, boolean isLeapYear) {
 272         assertEquals(IsoChronology.INSTANCE.isLeapYear(year), isLeapYear);
 273     }
 274 
 275     //-----------------------------------------------------------------------
 276     // toString()
 277     //-----------------------------------------------------------------------
 278     @Test
 279     public void test_now() {
 280         assertEquals(LocalDate.from(IsoChronology.INSTANCE.dateNow()), LocalDate.now());
 281     }
 282 
 283     //-----------------------------------------------------------------------
 284     // toString()
 285     //-----------------------------------------------------------------------
 286     @DataProvider(name="toString")
 287     Object[][] data_toString() {
 288         return new Object[][] {
 289             {IsoChronology.INSTANCE.date(1, 1, 1), "0001-01-01"},
 290             {IsoChronology.INSTANCE.date(1728, 10, 28), "1728-10-28"},
 291             {IsoChronology.INSTANCE.date(1728, 10, 29), "1728-10-29"},
 292             {IsoChronology.INSTANCE.date(1727, 12, 5), "1727-12-05"},
 293             {IsoChronology.INSTANCE.date(1727, 12, 6), "1727-12-06"},
 294         };
 295     }
 296 
 297     @Test(dataProvider="toString")
 298     public void test_toString(LocalDate isoDate, String expected) {
 299         assertEquals(isoDate.toString(), expected);
 300     }
 301 
 302     //-----------------------------------------------------------------------
 303     // equals()
 304     //-----------------------------------------------------------------------
 305     @Test
 306     public void test_equals_true() {
 307         assertTrue(IsoChronology.INSTANCE.equals(IsoChronology.INSTANCE));
 308     }
 309 
 310     @Test
 311     public void test_equals_false() {
 312         assertFalse(IsoChronology.INSTANCE.equals(HijrahChronology.INSTANCE));
 313     }
 314 
 315 }