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/* |
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* Written by Doug Lea and Martin Buchholz with assistance from |
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* members of JCP JSR-166 Expert Group and released to the public |
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* domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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|
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import static java.util.concurrent.TimeUnit.DAYS; |
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import static java.util.concurrent.TimeUnit.HOURS; |
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import static java.util.concurrent.TimeUnit.MICROSECONDS; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.MINUTES; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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|
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import java.time.Duration; |
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import java.time.temporal.ChronoUnit; |
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import java.util.Arrays; |
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import java.util.concurrent.ThreadLocalRandom; |
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import java.util.concurrent.TimeUnit; |
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import java.util.stream.LongStream; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class TimeUnit8Test extends JSR166TestCase { |
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(TimeUnit8Test.class); |
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} |
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|
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/** |
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* tests for toChronoUnit. |
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*/ |
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public void testToChronoUnit() throws Exception { |
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assertSame(ChronoUnit.NANOS, NANOSECONDS.toChronoUnit()); |
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assertSame(ChronoUnit.MICROS, MICROSECONDS.toChronoUnit()); |
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assertSame(ChronoUnit.MILLIS, MILLISECONDS.toChronoUnit()); |
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assertSame(ChronoUnit.SECONDS, SECONDS.toChronoUnit()); |
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assertSame(ChronoUnit.MINUTES, MINUTES.toChronoUnit()); |
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assertSame(ChronoUnit.HOURS, HOURS.toChronoUnit()); |
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assertSame(ChronoUnit.DAYS, DAYS.toChronoUnit()); |
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|
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// Every TimeUnit has a defined ChronoUnit equivalent |
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for (TimeUnit x : TimeUnit.values()) |
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assertSame(x, TimeUnit.of(x.toChronoUnit())); |
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} |
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|
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/** |
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* tests for TimeUnit.of(ChronoUnit). |
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*/ |
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public void testTimeUnitOf() throws Exception { |
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assertSame(NANOSECONDS, TimeUnit.of(ChronoUnit.NANOS)); |
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assertSame(MICROSECONDS, TimeUnit.of(ChronoUnit.MICROS)); |
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assertSame(MILLISECONDS, TimeUnit.of(ChronoUnit.MILLIS)); |
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assertSame(SECONDS, TimeUnit.of(ChronoUnit.SECONDS)); |
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assertSame(MINUTES, TimeUnit.of(ChronoUnit.MINUTES)); |
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assertSame(HOURS, TimeUnit.of(ChronoUnit.HOURS)); |
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assertSame(DAYS, TimeUnit.of(ChronoUnit.DAYS)); |
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|
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assertThrows(NullPointerException.class, |
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() -> TimeUnit.of((ChronoUnit)null)); |
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|
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// ChronoUnits either round trip to their TimeUnit |
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// equivalents, or throw IllegalArgumentException. |
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for (ChronoUnit cu : ChronoUnit.values()) { |
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final TimeUnit tu; |
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try { |
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tu = TimeUnit.of(cu); |
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} catch (IllegalArgumentException acceptable) { |
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continue; |
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} |
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assertSame(cu, tu.toChronoUnit()); |
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} |
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} |
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|
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/** |
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* convert(Duration) roundtrips with Duration.ofXXXX and Duration.of(long, ChronoUnit) |
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*/ |
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public void testConvertDuration_roundtripDurationOf() { |
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long n = ThreadLocalRandom.current().nextLong(); |
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|
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assertEquals(n, NANOSECONDS.convert(Duration.ofNanos(n))); |
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assertEquals(n, NANOSECONDS.convert(Duration.of(n, ChronoUnit.NANOS))); |
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assertEquals(n, MILLISECONDS.convert(Duration.ofMillis(n))); |
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assertEquals(n, MILLISECONDS.convert(Duration.of(n, ChronoUnit.MILLIS))); |
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assertEquals(n, SECONDS.convert(Duration.ofSeconds(n))); |
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assertEquals(n, SECONDS.convert(Duration.of(n, ChronoUnit.SECONDS))); |
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n /= 60; |
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assertEquals(n, MINUTES.convert(Duration.ofMinutes(n))); |
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assertEquals(n, MINUTES.convert(Duration.of(n, ChronoUnit.MINUTES))); |
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n /= 60; |
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assertEquals(n, HOURS.convert(Duration.ofHours(n))); |
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assertEquals(n, HOURS.convert(Duration.of(n, ChronoUnit.HOURS))); |
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n /= 24; |
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assertEquals(n, DAYS.convert(Duration.ofDays(n))); |
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assertEquals(n, DAYS.convert(Duration.of(n, ChronoUnit.DAYS))); |
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} |
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|
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/** |
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* convert(Duration.ofNanos(n)) agrees with convert(n, NANOSECONDS) |
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*/ |
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public void testConvertDuration_roundtripDurationOfNanos() { |
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// Test values near unit transitions and near overflow. |
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LongStream.concat( |
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Arrays.stream(TimeUnit.values()).mapToLong(u -> u.toNanos(1)), |
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LongStream.of(Long.MAX_VALUE, Long.MIN_VALUE)) |
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.flatMap(n -> LongStream.of(n, n + 1, n - 1)) |
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.flatMap(n -> LongStream.of(n, n + 1_000_000_000, n - 1_000_000_000)) |
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.flatMap(n -> LongStream.of(n, -n)) |
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// .peek(System.err::println) |
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.forEach(n -> Arrays.stream(TimeUnit.values()).forEach( |
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u -> assertEquals(u.convert(n, NANOSECONDS), |
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u.convert(Duration.ofNanos(n))))); |
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} |
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|
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/** |
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* convert(Duration) doesn't misbehave near Long.MAX_VALUE and Long.MIN_VALUE. |
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*/ |
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public void testConvertDuration_nearOverflow() { |
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ChronoUnit NANOS = ChronoUnit.NANOS; |
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Duration maxDuration = Duration.ofSeconds(Long.MAX_VALUE, 999_999_999); |
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Duration minDuration = Duration.ofSeconds(Long.MIN_VALUE, 0); |
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|
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for (TimeUnit u : TimeUnit.values()) { |
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ChronoUnit cu = u.toChronoUnit(); |
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long r; |
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if (u.toNanos(1) > SECONDS.toNanos(1)) { |
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r = u.toNanos(1) / SECONDS.toNanos(1); |
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|
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assertThrows(ArithmeticException.class, |
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() -> Duration.of(Long.MAX_VALUE, cu), |
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() -> Duration.of(Long.MIN_VALUE, cu)); |
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} else { |
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r = 1; |
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|
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Duration max = Duration.of(Long.MAX_VALUE, cu); |
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Duration min = Duration.of(Long.MIN_VALUE, cu); |
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assertEquals(Long.MAX_VALUE, u.convert(max)); |
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assertEquals(Long.MAX_VALUE - 1, u.convert(max.minus(1, NANOS))); |
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assertEquals(Long.MAX_VALUE - 1, u.convert(max.minus(1, cu))); |
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assertEquals(Long.MIN_VALUE, u.convert(min)); |
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assertEquals(Long.MIN_VALUE + 1, u.convert(min.plus(1, NANOS))); |
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assertEquals(Long.MIN_VALUE + 1, u.convert(min.plus(1, cu))); |
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assertEquals(Long.MAX_VALUE, u.convert(max.plus(1, NANOS))); |
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if (u != SECONDS) { |
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assertEquals(Long.MAX_VALUE, u.convert(max.plus(1, cu))); |
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assertEquals(Long.MIN_VALUE, u.convert(min.minus(1, NANOS))); |
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assertEquals(Long.MIN_VALUE, u.convert(min.minus(1, cu))); |
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} |
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} |
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assertEquals(Long.MAX_VALUE / r, u.convert(maxDuration)); |
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assertEquals(Long.MIN_VALUE / r, u.convert(minDuration)); |
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} |
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} |
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|
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} |
