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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* This file is available under and governed by the GNU General Public
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* License version 2 only, as published by the Free Software Foundation.
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* However, the following notice accompanied the original version of this
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* file:
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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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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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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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import junit.framework.Test;
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import junit.framework.TestSuite;
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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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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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* 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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// 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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* 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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assertThrows(NullPointerException.class,
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() -> TimeUnit.of((ChronoUnit)null));
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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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* 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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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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* 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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* 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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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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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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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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