/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
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*/
/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* Written by Doug Lea and Martin Buchholz with assistance from
* members of JCP JSR-166 Expert Group and released to the public
* domain, as explained at
* http://creativecommons.org/publicdomain/zero/1.0/
*/
import static java.util.concurrent.TimeUnit.DAYS;
import static java.util.concurrent.TimeUnit.HOURS;
import static java.util.concurrent.TimeUnit.MICROSECONDS;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.MINUTES;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
import java.time.Duration;
import java.time.temporal.ChronoUnit;
import java.util.Arrays;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
import java.util.stream.LongStream;
import junit.framework.Test;
import junit.framework.TestSuite;
public class TimeUnit8Test
extends JSR166TestCase {
public static void main(String[] args) {
main(suite(), args);
}
public static Test suite() {
return new TestSuite(TimeUnit8Test.
class);
}
/**
* tests for toChronoUnit.
*/
public void testToChronoUnit()
throws Exception {
assertSame(ChronoUnit.NANOS, NANOSECONDS.toChronoUnit());
assertSame(ChronoUnit.MICROS, MICROSECONDS.toChronoUnit());
assertSame(ChronoUnit.MILLIS, MILLISECONDS.toChronoUnit());
assertSame(ChronoUnit.SECONDS, SECONDS.toChronoUnit());
assertSame(ChronoUnit.MINUTES, MINUTES.toChronoUnit());
assertSame(ChronoUnit.HOURS, HOURS.toChronoUnit());
assertSame(ChronoUnit.DAYS, DAYS.toChronoUnit());
// Every TimeUnit has a defined ChronoUnit equivalent
for (TimeUnit x : TimeUnit.values())
assertSame(x, TimeUnit.of(x.toChronoUnit()));
}
/**
* tests for TimeUnit.of(ChronoUnit).
*/
public void testTimeUnitOf()
throws Exception {
assertSame(NANOSECONDS, TimeUnit.of(ChronoUnit.NANOS));
assertSame(MICROSECONDS, TimeUnit.of(ChronoUnit.MICROS));
assertSame(MILLISECONDS, TimeUnit.of(ChronoUnit.MILLIS));
assertSame(SECONDS, TimeUnit.of(ChronoUnit.SECONDS));
assertSame(MINUTES, TimeUnit.of(ChronoUnit.MINUTES));
assertSame(HOURS, TimeUnit.of(ChronoUnit.HOURS));
assertSame(DAYS, TimeUnit.of(ChronoUnit.DAYS));
assertThrows(NullPointerException.
class,
() -> TimeUnit.of((ChronoUnit)
null));
// ChronoUnits either round trip to their TimeUnit
// equivalents, or throw IllegalArgumentException.
for (ChronoUnit cu : ChronoUnit.values()) {
final TimeUnit tu;
try {
tu = TimeUnit.of(cu);
}
catch (IllegalArgumentException acceptable) {
continue;
}
assertSame(cu, tu.toChronoUnit());
}
}
/**
* convert(Duration) roundtrips with Duration.ofXXXX and Duration.of(long, ChronoUnit)
*/
public void testConvertDuration_roundtripDurationOf() {
long n = ThreadLocalRandom.current().nextLong();
assertEquals(n, NANOSECONDS.convert(Duration.ofNanos(n)));
assertEquals(n, NANOSECONDS.convert(Duration.of(n, ChronoUnit.NANOS)));
assertEquals(n, MILLISECONDS.convert(Duration.ofMillis(n)));
assertEquals(n, MILLISECONDS.convert(Duration.of(n, ChronoUnit.MILLIS)));
assertEquals(n, SECONDS.convert(Duration.ofSeconds(n)));
assertEquals(n, SECONDS.convert(Duration.of(n, ChronoUnit.SECONDS)));
n /= 60;
assertEquals(n, MINUTES.convert(Duration.ofMinutes(n)));
assertEquals(n, MINUTES.convert(Duration.of(n, ChronoUnit.MINUTES)));
n /= 60;
assertEquals(n, HOURS.convert(Duration.ofHours(n)));
assertEquals(n, HOURS.convert(Duration.of(n, ChronoUnit.HOURS)));
n /= 24;
assertEquals(n, DAYS.convert(Duration.ofDays(n)));
assertEquals(n, DAYS.convert(Duration.of(n, ChronoUnit.DAYS)));
}
/**
* convert(Duration.ofNanos(n)) agrees with convert(n, NANOSECONDS)
*/
public void testConvertDuration_roundtripDurationOfNanos() {
// Test values near unit transitions and near overflow.
LongStream.concat(
Arrays.stream(TimeUnit.values()).mapToLong(u -> u.toNanos(1)),
LongStream.of(
Long.MAX_VALUE,
Long.MIN_VALUE))
.flatMap(n -> LongStream.of(n, n + 1, n - 1))
.flatMap(n -> LongStream.of(n, n + 1_000_000_000, n - 1_000_000_000))
.flatMap(n -> LongStream.of(n, -n))
// .peek(System.err::println)
.forEach(n -> Arrays.stream(TimeUnit.values()).forEach(
u -> assertEquals(u.convert(n, NANOSECONDS),
u.convert(Duration.ofNanos(n)))));
}
/**
* convert(Duration) doesn't misbehave near Long.MAX_VALUE and Long.MIN_VALUE.
*/
public void testConvertDuration_nearOverflow() {
ChronoUnit NANOS = ChronoUnit.NANOS;
Duration maxDuration = Duration.ofSeconds(
Long.MAX_VALUE, 999_999_999);
Duration minDuration = Duration.ofSeconds(
Long.MIN_VALUE, 0);
for (TimeUnit u : TimeUnit.values()) {
ChronoUnit cu = u.toChronoUnit();
long r;
if (u.toNanos(1) > SECONDS.toNanos(1)) {
r = u.toNanos(1) / SECONDS.toNanos(1);
assertThrows(ArithmeticException.
class,
() -> Duration.of(
Long.MAX_VALUE, cu),
() -> Duration.of(
Long.MIN_VALUE, cu));
}
else {
r = 1;
Duration max = Duration.of(
Long.MAX_VALUE, cu);
Duration min = Duration.of(
Long.MIN_VALUE, cu);
assertEquals(
Long.MAX_VALUE, u.convert(max));
assertEquals(
Long.MAX_VALUE - 1, u.convert(max.minus(1, NANOS)));
assertEquals(
Long.MAX_VALUE - 1, u.convert(max.minus(1, cu)));
assertEquals(
Long.MIN_VALUE, u.convert(min));
assertEquals(
Long.MIN_VALUE + 1, u.convert(min.plus(1, NANOS)));
assertEquals(
Long.MIN_VALUE + 1, u.convert(min.plus(1, cu)));
assertEquals(
Long.MAX_VALUE, u.convert(max.plus(1, NANOS)));
if (u != SECONDS) {
assertEquals(
Long.MAX_VALUE, u.convert(max.plus(1, cu)));
assertEquals(
Long.MIN_VALUE, u.convert(min.minus(1, NANOS)));
assertEquals(
Long.MIN_VALUE, u.convert(min.minus(1, cu)));
}
}
assertEquals(
Long.MAX_VALUE / r, u.convert(maxDuration));
assertEquals(
Long.MIN_VALUE / r, u.convert(minDuration));
}
}
}
