1 /* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 */ 22 23 /* 24 * This file is available under and governed by the GNU General Public 25 * License version 2 only, as published by the Free Software Foundation. 26 * However, the following notice accompanied the original version of this 27 * file: 28 * 29 * Written by Doug Lea and Martin Buchholz with assistance from 30 * members of JCP JSR-166 Expert Group and released to the public 31 * domain, as explained at 32 * http://creativecommons.org/publicdomain/zero/1.0/ 33 */ 34 35 import static java.util.concurrent.TimeUnit.DAYS; 36 import static java.util.concurrent.TimeUnit.HOURS; 37 import static java.util.concurrent.TimeUnit.MICROSECONDS; 38 import static java.util.concurrent.TimeUnit.MILLISECONDS; 39 import static java.util.concurrent.TimeUnit.MINUTES; 40 import static java.util.concurrent.TimeUnit.NANOSECONDS; 41 import static java.util.concurrent.TimeUnit.SECONDS; 42 43 import java.time.Duration; 44 import java.time.temporal.ChronoUnit; 45 import java.util.Arrays; 46 import java.util.concurrent.ThreadLocalRandom; 47 import java.util.concurrent.TimeUnit; 48 import java.util.stream.LongStream; 49 50 import junit.framework.Test; 51 import junit.framework.TestSuite; 52 53 public class TimeUnit8Test extends JSR166TestCase { main(String[] args)54 public static void main(String[] args) { 55 main(suite(), args); 56 } 57 suite()58 public static Test suite() { 59 return new TestSuite(TimeUnit8Test.class); 60 } 61 62 /** 63 * tests for toChronoUnit. 64 */ testToChronoUnit()65 public void testToChronoUnit() throws Exception { 66 assertSame(ChronoUnit.NANOS, NANOSECONDS.toChronoUnit()); 67 assertSame(ChronoUnit.MICROS, MICROSECONDS.toChronoUnit()); 68 assertSame(ChronoUnit.MILLIS, MILLISECONDS.toChronoUnit()); 69 assertSame(ChronoUnit.SECONDS, SECONDS.toChronoUnit()); 70 assertSame(ChronoUnit.MINUTES, MINUTES.toChronoUnit()); 71 assertSame(ChronoUnit.HOURS, HOURS.toChronoUnit()); 72 assertSame(ChronoUnit.DAYS, DAYS.toChronoUnit()); 73 74 // Every TimeUnit has a defined ChronoUnit equivalent 75 for (TimeUnit x : TimeUnit.values()) 76 assertSame(x, TimeUnit.of(x.toChronoUnit())); 77 } 78 79 /** 80 * tests for TimeUnit.of(ChronoUnit). 81 */ testTimeUnitOf()82 public void testTimeUnitOf() throws Exception { 83 assertSame(NANOSECONDS, TimeUnit.of(ChronoUnit.NANOS)); 84 assertSame(MICROSECONDS, TimeUnit.of(ChronoUnit.MICROS)); 85 assertSame(MILLISECONDS, TimeUnit.of(ChronoUnit.MILLIS)); 86 assertSame(SECONDS, TimeUnit.of(ChronoUnit.SECONDS)); 87 assertSame(MINUTES, TimeUnit.of(ChronoUnit.MINUTES)); 88 assertSame(HOURS, TimeUnit.of(ChronoUnit.HOURS)); 89 assertSame(DAYS, TimeUnit.of(ChronoUnit.DAYS)); 90 91 assertThrows(NullPointerException.class, 92 () -> TimeUnit.of((ChronoUnit)null)); 93 94 // ChronoUnits either round trip to their TimeUnit 95 // equivalents, or throw IllegalArgumentException. 96 for (ChronoUnit cu : ChronoUnit.values()) { 97 final TimeUnit tu; 98 try { 99 tu = TimeUnit.of(cu); 100 } catch (IllegalArgumentException acceptable) { 101 continue; 102 } 103 assertSame(cu, tu.toChronoUnit()); 104 } 105 } 106 107 /** 108 * convert(Duration) roundtrips with Duration.ofXXXX and Duration.of(long, ChronoUnit) 109 */ testConvertDuration_roundtripDurationOf()110 public void testConvertDuration_roundtripDurationOf() { 111 long n = ThreadLocalRandom.current().nextLong(); 112 113 assertEquals(n, NANOSECONDS.convert(Duration.ofNanos(n))); 114 assertEquals(n, NANOSECONDS.convert(Duration.of(n, ChronoUnit.NANOS))); 115 assertEquals(n, MILLISECONDS.convert(Duration.ofMillis(n))); 116 assertEquals(n, MILLISECONDS.convert(Duration.of(n, ChronoUnit.MILLIS))); 117 assertEquals(n, SECONDS.convert(Duration.ofSeconds(n))); 118 assertEquals(n, SECONDS.convert(Duration.of(n, ChronoUnit.SECONDS))); 119 n /= 60; 120 assertEquals(n, MINUTES.convert(Duration.ofMinutes(n))); 121 assertEquals(n, MINUTES.convert(Duration.of(n, ChronoUnit.MINUTES))); 122 n /= 60; 123 assertEquals(n, HOURS.convert(Duration.ofHours(n))); 124 assertEquals(n, HOURS.convert(Duration.of(n, ChronoUnit.HOURS))); 125 n /= 24; 126 assertEquals(n, DAYS.convert(Duration.ofDays(n))); 127 assertEquals(n, DAYS.convert(Duration.of(n, ChronoUnit.DAYS))); 128 } 129 130 /** 131 * convert(Duration.ofNanos(n)) agrees with convert(n, NANOSECONDS) 132 */ testConvertDuration_roundtripDurationOfNanos()133 public void testConvertDuration_roundtripDurationOfNanos() { 134 // Test values near unit transitions and near overflow. 135 LongStream.concat( 136 Arrays.stream(TimeUnit.values()).mapToLong(u -> u.toNanos(1)), 137 LongStream.of(Long.MAX_VALUE, Long.MIN_VALUE)) 138 .flatMap(n -> LongStream.of(n, n + 1, n - 1)) 139 .flatMap(n -> LongStream.of(n, n + 1_000_000_000, n - 1_000_000_000)) 140 .flatMap(n -> LongStream.of(n, -n)) 141 // .peek(System.err::println) 142 .forEach(n -> Arrays.stream(TimeUnit.values()).forEach( 143 u -> assertEquals(u.convert(n, NANOSECONDS), 144 u.convert(Duration.ofNanos(n))))); 145 } 146 147 /** 148 * convert(Duration) doesn't misbehave near Long.MAX_VALUE and Long.MIN_VALUE. 149 */ testConvertDuration_nearOverflow()150 public void testConvertDuration_nearOverflow() { 151 ChronoUnit NANOS = ChronoUnit.NANOS; 152 Duration maxDuration = Duration.ofSeconds(Long.MAX_VALUE, 999_999_999); 153 Duration minDuration = Duration.ofSeconds(Long.MIN_VALUE, 0); 154 155 for (TimeUnit u : TimeUnit.values()) { 156 ChronoUnit cu = u.toChronoUnit(); 157 long r; 158 if (u.toNanos(1) > SECONDS.toNanos(1)) { 159 r = u.toNanos(1) / SECONDS.toNanos(1); 160 161 assertThrows(ArithmeticException.class, 162 () -> Duration.of(Long.MAX_VALUE, cu), 163 () -> Duration.of(Long.MIN_VALUE, cu)); 164 } else { 165 r = 1; 166 167 Duration max = Duration.of(Long.MAX_VALUE, cu); 168 Duration min = Duration.of(Long.MIN_VALUE, cu); 169 assertEquals(Long.MAX_VALUE, u.convert(max)); 170 assertEquals(Long.MAX_VALUE - 1, u.convert(max.minus(1, NANOS))); 171 assertEquals(Long.MAX_VALUE - 1, u.convert(max.minus(1, cu))); 172 assertEquals(Long.MIN_VALUE, u.convert(min)); 173 assertEquals(Long.MIN_VALUE + 1, u.convert(min.plus(1, NANOS))); 174 assertEquals(Long.MIN_VALUE + 1, u.convert(min.plus(1, cu))); 175 assertEquals(Long.MAX_VALUE, u.convert(max.plus(1, NANOS))); 176 if (u != SECONDS) { 177 assertEquals(Long.MAX_VALUE, u.convert(max.plus(1, cu))); 178 assertEquals(Long.MIN_VALUE, u.convert(min.minus(1, NANOS))); 179 assertEquals(Long.MIN_VALUE, u.convert(min.minus(1, cu))); 180 } 181 } 182 183 assertEquals(Long.MAX_VALUE / r, u.convert(maxDuration)); 184 assertEquals(Long.MIN_VALUE / r, u.convert(minDuration)); 185 } 186 } 187 188 } 189