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 package test.java.util.concurrent.tck; 36 import static java.util.concurrent.TimeUnit.DAYS; 37 import static java.util.concurrent.TimeUnit.HOURS; 38 import static java.util.concurrent.TimeUnit.MICROSECONDS; 39 import static java.util.concurrent.TimeUnit.MILLISECONDS; 40 import static java.util.concurrent.TimeUnit.MINUTES; 41 import static java.util.concurrent.TimeUnit.NANOSECONDS; 42 import static java.util.concurrent.TimeUnit.SECONDS; 43 import static org.junit.Assert.assertEquals; 44 import static org.junit.Assert.assertFalse; 45 import static org.junit.Assert.assertNull; 46 import static org.junit.Assert.assertNotNull; 47 import static org.junit.Assert.assertSame; 48 import static org.junit.Assert.assertNotSame; 49 import static org.junit.Assert.assertTrue; 50 import static org.junit.Assert.fail; 51 52 import java.time.Duration; 53 import java.time.temporal.ChronoUnit; 54 import java.util.Arrays; 55 import java.util.concurrent.ThreadLocalRandom; 56 import java.util.concurrent.TimeUnit; 57 import java.util.stream.LongStream; 58 59 import org.junit.Test; 60 import org.junit.runner.RunWith; 61 import org.junit.runners.JUnit4; 62 63 // Android-changed: Use JUnit4. 64 @RunWith(JUnit4.class) 65 public class TimeUnit8Test extends JSR166TestCase { 66 67 // Android-changed: Use JUnitCore.main. main(String[] args)68 public static void main(String[] args) { 69 // main(suite(), args); 70 org.junit.runner.JUnitCore.main("test.java.util.concurrent.tck.TimeUnit8Test"); 71 } 72 // public static Test suite() { 73 // return new TestSuite(TimeUnit8Test.class); 74 // } 75 76 /** 77 * tests for toChronoUnit. 78 */ 79 @Test testToChronoUnit()80 public void testToChronoUnit() throws Exception { 81 assertSame(ChronoUnit.NANOS, NANOSECONDS.toChronoUnit()); 82 assertSame(ChronoUnit.MICROS, MICROSECONDS.toChronoUnit()); 83 assertSame(ChronoUnit.MILLIS, MILLISECONDS.toChronoUnit()); 84 assertSame(ChronoUnit.SECONDS, SECONDS.toChronoUnit()); 85 assertSame(ChronoUnit.MINUTES, MINUTES.toChronoUnit()); 86 assertSame(ChronoUnit.HOURS, HOURS.toChronoUnit()); 87 assertSame(ChronoUnit.DAYS, DAYS.toChronoUnit()); 88 89 // Every TimeUnit has a defined ChronoUnit equivalent 90 for (TimeUnit x : TimeUnit.values()) 91 assertSame(x, TimeUnit.of(x.toChronoUnit())); 92 } 93 94 /** 95 * tests for TimeUnit.of(ChronoUnit). 96 */ 97 @Test testTimeUnitOf()98 public void testTimeUnitOf() throws Exception { 99 assertSame(NANOSECONDS, TimeUnit.of(ChronoUnit.NANOS)); 100 assertSame(MICROSECONDS, TimeUnit.of(ChronoUnit.MICROS)); 101 assertSame(MILLISECONDS, TimeUnit.of(ChronoUnit.MILLIS)); 102 assertSame(SECONDS, TimeUnit.of(ChronoUnit.SECONDS)); 103 assertSame(MINUTES, TimeUnit.of(ChronoUnit.MINUTES)); 104 assertSame(HOURS, TimeUnit.of(ChronoUnit.HOURS)); 105 assertSame(DAYS, TimeUnit.of(ChronoUnit.DAYS)); 106 107 assertThrows(NullPointerException.class, 108 () -> TimeUnit.of((ChronoUnit)null)); 109 110 // ChronoUnits either round trip to their TimeUnit 111 // equivalents, or throw IllegalArgumentException. 112 for (ChronoUnit cu : ChronoUnit.values()) { 113 final TimeUnit tu; 114 try { 115 tu = TimeUnit.of(cu); 116 } catch (IllegalArgumentException acceptable) { 117 continue; 118 } 119 assertSame(cu, tu.toChronoUnit()); 120 } 121 } 122 123 /** 124 * convert(Duration) roundtrips with Duration.ofXXXX and Duration.of(long, ChronoUnit) 125 */ 126 @Test testConvertDuration_roundtripDurationOf()127 public void testConvertDuration_roundtripDurationOf() { 128 long n = ThreadLocalRandom.current().nextLong(); 129 130 assertEquals(n, NANOSECONDS.convert(Duration.ofNanos(n))); 131 assertEquals(n, NANOSECONDS.convert(Duration.of(n, ChronoUnit.NANOS))); 132 assertEquals(n, MILLISECONDS.convert(Duration.ofMillis(n))); 133 assertEquals(n, MILLISECONDS.convert(Duration.of(n, ChronoUnit.MILLIS))); 134 assertEquals(n, SECONDS.convert(Duration.ofSeconds(n))); 135 assertEquals(n, SECONDS.convert(Duration.of(n, ChronoUnit.SECONDS))); 136 n /= 60; 137 assertEquals(n, MINUTES.convert(Duration.ofMinutes(n))); 138 assertEquals(n, MINUTES.convert(Duration.of(n, ChronoUnit.MINUTES))); 139 n /= 60; 140 assertEquals(n, HOURS.convert(Duration.ofHours(n))); 141 assertEquals(n, HOURS.convert(Duration.of(n, ChronoUnit.HOURS))); 142 n /= 24; 143 assertEquals(n, DAYS.convert(Duration.ofDays(n))); 144 assertEquals(n, DAYS.convert(Duration.of(n, ChronoUnit.DAYS))); 145 } 146 147 /** 148 * convert(Duration.ofNanos(n)) agrees with convert(n, NANOSECONDS) 149 */ 150 @Test testConvertDuration_roundtripDurationOfNanos()151 public void testConvertDuration_roundtripDurationOfNanos() { 152 // Test values near unit transitions and near overflow. 153 LongStream.concat( 154 Arrays.stream(TimeUnit.values()).mapToLong(u -> u.toNanos(1)), 155 LongStream.of(Long.MAX_VALUE, Long.MIN_VALUE)) 156 .flatMap(n -> LongStream.of(n, n + 1, n - 1)) 157 .flatMap(n -> LongStream.of(n, n + 1_000_000_000, n - 1_000_000_000)) 158 .flatMap(n -> LongStream.of(n, -n)) 159 // .peek(System.err::println) 160 .forEach(n -> Arrays.stream(TimeUnit.values()).forEach( 161 u -> assertEquals(u.convert(n, NANOSECONDS), 162 u.convert(Duration.ofNanos(n))))); 163 } 164 165 /** 166 * convert(Duration) doesn't misbehave near Long.MAX_VALUE and Long.MIN_VALUE. 167 */ 168 @Test testConvertDuration_nearOverflow()169 public void testConvertDuration_nearOverflow() { 170 ChronoUnit NANOS = ChronoUnit.NANOS; 171 Duration maxDuration = Duration.ofSeconds(Long.MAX_VALUE, 999_999_999); 172 Duration minDuration = Duration.ofSeconds(Long.MIN_VALUE, 0); 173 174 for (TimeUnit u : TimeUnit.values()) { 175 ChronoUnit cu = u.toChronoUnit(); 176 long r; 177 if (u.toNanos(1) > SECONDS.toNanos(1)) { 178 r = u.toNanos(1) / SECONDS.toNanos(1); 179 180 assertThrows(ArithmeticException.class, 181 () -> Duration.of(Long.MAX_VALUE, cu), 182 () -> Duration.of(Long.MIN_VALUE, cu)); 183 } else { 184 r = 1; 185 186 Duration max = Duration.of(Long.MAX_VALUE, cu); 187 Duration min = Duration.of(Long.MIN_VALUE, cu); 188 assertEquals(Long.MAX_VALUE, u.convert(max)); 189 assertEquals(Long.MAX_VALUE - 1, u.convert(max.minus(1, NANOS))); 190 assertEquals(Long.MAX_VALUE - 1, u.convert(max.minus(1, cu))); 191 assertEquals(Long.MIN_VALUE, u.convert(min)); 192 assertEquals(Long.MIN_VALUE + 1, u.convert(min.plus(1, NANOS))); 193 assertEquals(Long.MIN_VALUE + 1, u.convert(min.plus(1, cu))); 194 assertEquals(Long.MAX_VALUE, u.convert(max.plus(1, NANOS))); 195 if (u != SECONDS) { 196 assertEquals(Long.MAX_VALUE, u.convert(max.plus(1, cu))); 197 assertEquals(Long.MIN_VALUE, u.convert(min.minus(1, NANOS))); 198 assertEquals(Long.MIN_VALUE, u.convert(min.minus(1, cu))); 199 } 200 } 201 202 assertEquals(Long.MAX_VALUE / r, u.convert(maxDuration)); 203 assertEquals(Long.MIN_VALUE / r, u.convert(minDuration)); 204 } 205 } 206 207 } 208