461 lines
18 KiB
Java
461 lines
18 KiB
Java
/*
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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 with assistance from members of JCP JSR-166
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* Expert Group and released to the public domain, as explained at
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* http://creativecommons.org/publicdomain/zero/1.0/
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* Other contributors include Andrew Wright, Jeffrey Hayes,
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* Pat Fisher, Mike Judd.
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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.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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import junit.framework.Test;
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import junit.framework.TestSuite;
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public class TimeUnitTest 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(TimeUnitTest.class);
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}
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void testConversion(TimeUnit x, TimeUnit y, long n, long expected) {
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assertEquals(expected, x.convert(n, y));
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switch (x) {
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case NANOSECONDS: assertEquals(expected, y.toNanos(n)); break;
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case MICROSECONDS: assertEquals(expected, y.toMicros(n)); break;
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case MILLISECONDS: assertEquals(expected, y.toMillis(n)); break;
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case SECONDS: assertEquals(expected, y.toSeconds(n)); break;
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case MINUTES: assertEquals(expected, y.toMinutes(n)); break;
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case HOURS: assertEquals(expected, y.toHours(n)); break;
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case DAYS: assertEquals(expected, y.toDays(n)); break;
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default: throw new AssertionError();
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}
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if (n > 0) testConversion(x, y, -n, -expected);
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}
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void testConversion(TimeUnit x, TimeUnit y) {
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long ratio = x.toNanos(1)/y.toNanos(1);
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assertTrue(ratio > 0);
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long[] ns = { 0, 1, 2, Long.MAX_VALUE/ratio, Long.MIN_VALUE/ratio };
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for (long n : ns) {
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testConversion(y, x, n, n * ratio);
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long[] ks = { n * ratio, n * ratio + 1, n * ratio - 1 };
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for (long k : ks) {
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testConversion(x, y, k, k / ratio);
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}
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}
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}
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/**
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* Conversion methods correctly convert sample values
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*/
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public void testConversions() {
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// Sanity check
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assertEquals(1, NANOSECONDS.toNanos(1));
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assertEquals(1000L * NANOSECONDS.toNanos(1), MICROSECONDS.toNanos(1));
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assertEquals(1000L * MICROSECONDS.toNanos(1), MILLISECONDS.toNanos(1));
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assertEquals(1000L * MILLISECONDS.toNanos(1), SECONDS.toNanos(1));
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assertEquals(60L * SECONDS.toNanos(1), MINUTES.toNanos(1));
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assertEquals(60L * MINUTES.toNanos(1), HOURS.toNanos(1));
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assertEquals(24L * HOURS.toNanos(1), DAYS.toNanos(1));
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for (TimeUnit x : TimeUnit.values()) {
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assertEquals(x.toNanos(1), NANOSECONDS.convert(1, x));
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}
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for (TimeUnit x : TimeUnit.values())
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for (TimeUnit y : TimeUnit.values())
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if (x.toNanos(1) >= y.toNanos(1))
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testConversion(x, y);
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}
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/**
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* convert saturates positive too-large values to Long.MAX_VALUE
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* and negative to LONG.MIN_VALUE
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*/
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public void testConvertSaturate() {
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assertEquals(Long.MAX_VALUE,
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NANOSECONDS.convert(Long.MAX_VALUE / 2, SECONDS));
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assertEquals(Long.MIN_VALUE,
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NANOSECONDS.convert(-Long.MAX_VALUE / 4, SECONDS));
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assertEquals(Long.MAX_VALUE,
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NANOSECONDS.convert(Long.MAX_VALUE / 2, MINUTES));
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assertEquals(Long.MIN_VALUE,
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NANOSECONDS.convert(-Long.MAX_VALUE / 4, MINUTES));
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assertEquals(Long.MAX_VALUE,
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NANOSECONDS.convert(Long.MAX_VALUE / 2, HOURS));
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assertEquals(Long.MIN_VALUE,
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NANOSECONDS.convert(-Long.MAX_VALUE / 4, HOURS));
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assertEquals(Long.MAX_VALUE,
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NANOSECONDS.convert(Long.MAX_VALUE / 2, DAYS));
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assertEquals(Long.MIN_VALUE,
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NANOSECONDS.convert(-Long.MAX_VALUE / 4, DAYS));
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for (TimeUnit x : TimeUnit.values())
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for (TimeUnit y : TimeUnit.values()) {
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long ratio = x.toNanos(1) / y.toNanos(1);
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if (ratio >= 1) {
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assertEquals(ratio, y.convert(1, x));
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assertEquals(1, x.convert(ratio, y));
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long max = Long.MAX_VALUE/ratio;
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assertEquals(max * ratio, y.convert(max, x));
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assertEquals(-max * ratio, y.convert(-max, x));
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assertEquals(max, x.convert(max * ratio, y));
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assertEquals(-max, x.convert(-max * ratio, y));
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if (max < Long.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, y.convert(max + 1, x));
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assertEquals(Long.MIN_VALUE, y.convert(-max - 1, x));
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assertEquals(Long.MIN_VALUE, y.convert(Long.MIN_VALUE + 1, x));
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}
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assertEquals(Long.MAX_VALUE, y.convert(Long.MAX_VALUE, x));
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assertEquals(Long.MIN_VALUE, y.convert(Long.MIN_VALUE, x));
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}
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}
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}
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/**
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* toNanos saturates positive too-large values to Long.MAX_VALUE
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* and negative to LONG.MIN_VALUE
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*/
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public void testToNanosSaturate() {
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assertEquals(Long.MAX_VALUE,
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MILLISECONDS.toNanos(Long.MAX_VALUE / 2));
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assertEquals(Long.MIN_VALUE,
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MILLISECONDS.toNanos(-Long.MAX_VALUE / 3));
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for (TimeUnit x : TimeUnit.values()) {
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long ratio = x.toNanos(1) / NANOSECONDS.toNanos(1);
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if (ratio >= 1) {
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long max = Long.MAX_VALUE/ratio;
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for (long z : new long[] {0, 1, -1, max, -max})
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assertEquals(z * ratio, x.toNanos(z));
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if (max < Long.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toNanos(max + 1));
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assertEquals(Long.MIN_VALUE, x.toNanos(-max - 1));
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assertEquals(Long.MIN_VALUE, x.toNanos(Long.MIN_VALUE + 1));
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}
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assertEquals(Long.MAX_VALUE, x.toNanos(Long.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toNanos(Long.MIN_VALUE));
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if (max < Integer.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toNanos(Integer.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toNanos(Integer.MIN_VALUE));
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}
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}
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}
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}
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/**
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* toMicros saturates positive too-large values to Long.MAX_VALUE
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* and negative to LONG.MIN_VALUE
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*/
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public void testToMicrosSaturate() {
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for (TimeUnit x : TimeUnit.values()) {
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long ratio = x.toNanos(1) / MICROSECONDS.toNanos(1);
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if (ratio >= 1) {
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long max = Long.MAX_VALUE/ratio;
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for (long z : new long[] {0, 1, -1, max, -max})
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assertEquals(z * ratio, x.toMicros(z));
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if (max < Long.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toMicros(max + 1));
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assertEquals(Long.MIN_VALUE, x.toMicros(-max - 1));
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assertEquals(Long.MIN_VALUE, x.toMicros(Long.MIN_VALUE + 1));
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}
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assertEquals(Long.MAX_VALUE, x.toMicros(Long.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toMicros(Long.MIN_VALUE));
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if (max < Integer.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toMicros(Integer.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toMicros(Integer.MIN_VALUE));
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}
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}
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}
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}
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/**
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* toMillis saturates positive too-large values to Long.MAX_VALUE
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* and negative to LONG.MIN_VALUE
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*/
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public void testToMillisSaturate() {
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for (TimeUnit x : TimeUnit.values()) {
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long ratio = x.toNanos(1) / MILLISECONDS.toNanos(1);
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if (ratio >= 1) {
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long max = Long.MAX_VALUE/ratio;
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for (long z : new long[] {0, 1, -1, max, -max})
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assertEquals(z * ratio, x.toMillis(z));
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if (max < Long.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toMillis(max + 1));
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assertEquals(Long.MIN_VALUE, x.toMillis(-max - 1));
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assertEquals(Long.MIN_VALUE, x.toMillis(Long.MIN_VALUE + 1));
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}
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assertEquals(Long.MAX_VALUE, x.toMillis(Long.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toMillis(Long.MIN_VALUE));
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if (max < Integer.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toMillis(Integer.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toMillis(Integer.MIN_VALUE));
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}
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}
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}
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}
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/**
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* toSeconds saturates positive too-large values to Long.MAX_VALUE
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* and negative to LONG.MIN_VALUE
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*/
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public void testToSecondsSaturate() {
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for (TimeUnit x : TimeUnit.values()) {
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long ratio = x.toNanos(1) / SECONDS.toNanos(1);
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if (ratio >= 1) {
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long max = Long.MAX_VALUE/ratio;
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for (long z : new long[] {0, 1, -1, max, -max})
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assertEquals(z * ratio, x.toSeconds(z));
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if (max < Long.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toSeconds(max + 1));
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assertEquals(Long.MIN_VALUE, x.toSeconds(-max - 1));
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assertEquals(Long.MIN_VALUE, x.toSeconds(Long.MIN_VALUE + 1));
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}
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assertEquals(Long.MAX_VALUE, x.toSeconds(Long.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toSeconds(Long.MIN_VALUE));
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if (max < Integer.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toSeconds(Integer.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toSeconds(Integer.MIN_VALUE));
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}
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}
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}
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}
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/**
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* toMinutes saturates positive too-large values to Long.MAX_VALUE
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* and negative to LONG.MIN_VALUE
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*/
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public void testToMinutesSaturate() {
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for (TimeUnit x : TimeUnit.values()) {
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long ratio = x.toNanos(1) / MINUTES.toNanos(1);
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if (ratio > 1) {
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long max = Long.MAX_VALUE/ratio;
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for (long z : new long[] {0, 1, -1, max, -max})
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assertEquals(z * ratio, x.toMinutes(z));
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assertEquals(Long.MAX_VALUE, x.toMinutes(max + 1));
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assertEquals(Long.MIN_VALUE, x.toMinutes(-max - 1));
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assertEquals(Long.MAX_VALUE, x.toMinutes(Long.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toMinutes(Long.MIN_VALUE));
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assertEquals(Long.MIN_VALUE, x.toMinutes(Long.MIN_VALUE + 1));
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}
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}
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}
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/**
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* toHours saturates positive too-large values to Long.MAX_VALUE
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* and negative to LONG.MIN_VALUE
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*/
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public void testToHoursSaturate() {
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for (TimeUnit x : TimeUnit.values()) {
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long ratio = x.toNanos(1) / HOURS.toNanos(1);
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if (ratio >= 1) {
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long max = Long.MAX_VALUE/ratio;
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for (long z : new long[] {0, 1, -1, max, -max})
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assertEquals(z * ratio, x.toHours(z));
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if (max < Long.MAX_VALUE) {
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assertEquals(Long.MAX_VALUE, x.toHours(max + 1));
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assertEquals(Long.MIN_VALUE, x.toHours(-max - 1));
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assertEquals(Long.MIN_VALUE, x.toHours(Long.MIN_VALUE + 1));
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}
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assertEquals(Long.MAX_VALUE, x.toHours(Long.MAX_VALUE));
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assertEquals(Long.MIN_VALUE, x.toHours(Long.MIN_VALUE));
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}
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}
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}
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/**
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* toString returns name of unit
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*/
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public void testToString() {
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assertEquals("NANOSECONDS", NANOSECONDS.toString());
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assertEquals("MICROSECONDS", MICROSECONDS.toString());
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assertEquals("MILLISECONDS", MILLISECONDS.toString());
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assertEquals("SECONDS", SECONDS.toString());
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assertEquals("MINUTES", MINUTES.toString());
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assertEquals("HOURS", HOURS.toString());
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assertEquals("DAYS", DAYS.toString());
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}
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/**
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* name returns name of unit
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*/
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public void testName() {
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for (TimeUnit x : TimeUnit.values())
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assertEquals(x.toString(), x.name());
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}
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/**
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* Timed wait without holding lock throws
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* IllegalMonitorStateException
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*/
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public void testTimedWait_IllegalMonitorException() {
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() throws InterruptedException {
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Object o = new Object();
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try {
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MILLISECONDS.timedWait(o, LONGER_DELAY_MS);
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threadShouldThrow();
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} catch (IllegalMonitorStateException success) {}
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}});
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awaitTermination(t);
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}
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/**
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* timedWait throws InterruptedException when interrupted
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*/
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public void testTimedWait_Interruptible() {
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() throws InterruptedException {
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Object o = new Object();
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Thread.currentThread().interrupt();
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try {
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synchronized (o) {
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MILLISECONDS.timedWait(o, LONGER_DELAY_MS);
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}
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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pleaseInterrupt.countDown();
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try {
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synchronized (o) {
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MILLISECONDS.timedWait(o, LONGER_DELAY_MS);
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}
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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}});
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await(pleaseInterrupt);
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
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t.interrupt();
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awaitTermination(t);
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}
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/**
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* timedJoin throws InterruptedException when interrupted
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*/
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public void testTimedJoin_Interruptible() {
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
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final Thread s = newStartedThread(new CheckedInterruptedRunnable() {
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public void realRun() throws InterruptedException {
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Thread.sleep(LONGER_DELAY_MS);
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}});
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final Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() throws InterruptedException {
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Thread.currentThread().interrupt();
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try {
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MILLISECONDS.timedJoin(s, LONGER_DELAY_MS);
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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pleaseInterrupt.countDown();
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try {
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MILLISECONDS.timedJoin(s, LONGER_DELAY_MS);
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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}});
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await(pleaseInterrupt);
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
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t.interrupt();
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awaitTermination(t);
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s.interrupt();
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awaitTermination(s);
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}
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/**
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* timeUnit.sleep throws InterruptedException when interrupted
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*/
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public void testTimedSleep_Interruptible() {
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() throws InterruptedException {
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Thread.currentThread().interrupt();
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try {
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MILLISECONDS.sleep(LONGER_DELAY_MS);
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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pleaseInterrupt.countDown();
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try {
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MILLISECONDS.sleep(LONGER_DELAY_MS);
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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}});
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await(pleaseInterrupt);
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
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t.interrupt();
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awaitTermination(t);
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}
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/**
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* timeUnit.sleep(x) for x <= 0 does not sleep at all.
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*/
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public void testTimedSleep_nonPositive() throws InterruptedException {
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boolean interrupt = randomBoolean();
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if (interrupt) Thread.currentThread().interrupt();
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randomTimeUnit().sleep(0L);
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randomTimeUnit().sleep(-1L);
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randomTimeUnit().sleep(Long.MIN_VALUE);
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if (interrupt) assertTrue(Thread.interrupted());
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}
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/**
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* a deserialized/reserialized unit is the same instance
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*/
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public void testSerialization() throws Exception {
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for (TimeUnit x : TimeUnit.values())
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assertSame(x, serialClone(x));
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}
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}
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