/*
* Written by Doug Lea 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/
* Other contributors include Andrew Wright, Jeffrey Hayes,
* Pat Fisher, Mike Judd.
*/
package jsr166;
import junit.framework.*;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
public class TimeUnitTest extends JSR166TestCase {
// (loops to 88888 check increments at all time divisions.)
/**
* convert correctly converts sample values across the units
*/
public void testConvert() {
for (long t = 0; t < 88888; ++t) {
assertEquals(t*60*60*24,
TimeUnit.SECONDS.convert(t,
TimeUnit.DAYS));
assertEquals(t*60*60,
TimeUnit.SECONDS.convert(t,
TimeUnit.HOURS));
assertEquals(t*60,
TimeUnit.SECONDS.convert(t,
TimeUnit.MINUTES));
assertEquals(t,
TimeUnit.SECONDS.convert(t,
TimeUnit.SECONDS));
assertEquals(t,
TimeUnit.SECONDS.convert(1000L*t,
TimeUnit.MILLISECONDS));
assertEquals(t,
TimeUnit.SECONDS.convert(1000000L*t,
TimeUnit.MICROSECONDS));
assertEquals(t,
TimeUnit.SECONDS.convert(1000000000L*t,
TimeUnit.NANOSECONDS));
assertEquals(1000L*t*60*60*24,
TimeUnit.MILLISECONDS.convert(t,
TimeUnit.DAYS));
assertEquals(1000L*t*60*60,
TimeUnit.MILLISECONDS.convert(t,
TimeUnit.HOURS));
assertEquals(1000L*t*60,
TimeUnit.MILLISECONDS.convert(t,
TimeUnit.MINUTES));
assertEquals(1000L*t,
TimeUnit.MILLISECONDS.convert(t,
TimeUnit.SECONDS));
assertEquals(t,
TimeUnit.MILLISECONDS.convert(t,
TimeUnit.MILLISECONDS));
assertEquals(t,
TimeUnit.MILLISECONDS.convert(1000L*t,
TimeUnit.MICROSECONDS));
assertEquals(t,
TimeUnit.MILLISECONDS.convert(1000000L*t,
TimeUnit.NANOSECONDS));
assertEquals(1000000L*t*60*60*24,
TimeUnit.MICROSECONDS.convert(t,
TimeUnit.DAYS));
assertEquals(1000000L*t*60*60,
TimeUnit.MICROSECONDS.convert(t,
TimeUnit.HOURS));
assertEquals(1000000L*t*60,
TimeUnit.MICROSECONDS.convert(t,
TimeUnit.MINUTES));
assertEquals(1000000L*t,
TimeUnit.MICROSECONDS.convert(t,
TimeUnit.SECONDS));
assertEquals(1000L*t,
TimeUnit.MICROSECONDS.convert(t,
TimeUnit.MILLISECONDS));
assertEquals(t,
TimeUnit.MICROSECONDS.convert(t,
TimeUnit.MICROSECONDS));
assertEquals(t,
TimeUnit.MICROSECONDS.convert(1000L*t,
TimeUnit.NANOSECONDS));
assertEquals(1000000000L*t*60*60*24,
TimeUnit.NANOSECONDS.convert(t,
TimeUnit.DAYS));
assertEquals(1000000000L*t*60*60,
TimeUnit.NANOSECONDS.convert(t,
TimeUnit.HOURS));
assertEquals(1000000000L*t*60,
TimeUnit.NANOSECONDS.convert(t,
TimeUnit.MINUTES));
assertEquals(1000000000L*t,
TimeUnit.NANOSECONDS.convert(t,
TimeUnit.SECONDS));
assertEquals(1000000L*t,
TimeUnit.NANOSECONDS.convert(t,
TimeUnit.MILLISECONDS));
assertEquals(1000L*t,
TimeUnit.NANOSECONDS.convert(t,
TimeUnit.MICROSECONDS));
assertEquals(t,
TimeUnit.NANOSECONDS.convert(t,
TimeUnit.NANOSECONDS));
}
}
/**
* toNanos correctly converts sample values in different units to
* nanoseconds
*/
public void testToNanos() {
for (long t = 0; t < 88888; ++t) {
assertEquals(t*1000000000L*60*60*24,
TimeUnit.DAYS.toNanos(t));
assertEquals(t*1000000000L*60*60,
TimeUnit.HOURS.toNanos(t));
assertEquals(t*1000000000L*60,
TimeUnit.MINUTES.toNanos(t));
assertEquals(1000000000L*t,
TimeUnit.SECONDS.toNanos(t));
assertEquals(1000000L*t,
TimeUnit.MILLISECONDS.toNanos(t));
assertEquals(1000L*t,
TimeUnit.MICROSECONDS.toNanos(t));
assertEquals(t,
TimeUnit.NANOSECONDS.toNanos(t));
}
}
/**
* toMicros correctly converts sample values in different units to
* microseconds
*/
public void testToMicros() {
for (long t = 0; t < 88888; ++t) {
assertEquals(t*1000000L*60*60*24,
TimeUnit.DAYS.toMicros(t));
assertEquals(t*1000000L*60*60,
TimeUnit.HOURS.toMicros(t));
assertEquals(t*1000000L*60,
TimeUnit.MINUTES.toMicros(t));
assertEquals(1000000L*t,
TimeUnit.SECONDS.toMicros(t));
assertEquals(1000L*t,
TimeUnit.MILLISECONDS.toMicros(t));
assertEquals(t,
TimeUnit.MICROSECONDS.toMicros(t));
assertEquals(t,
TimeUnit.NANOSECONDS.toMicros(t*1000L));
}
}
/**
* toMillis correctly converts sample values in different units to
* milliseconds
*/
public void testToMillis() {
for (long t = 0; t < 88888; ++t) {
assertEquals(t*1000L*60*60*24,
TimeUnit.DAYS.toMillis(t));
assertEquals(t*1000L*60*60,
TimeUnit.HOURS.toMillis(t));
assertEquals(t*1000L*60,
TimeUnit.MINUTES.toMillis(t));
assertEquals(1000L*t,
TimeUnit.SECONDS.toMillis(t));
assertEquals(t,
TimeUnit.MILLISECONDS.toMillis(t));
assertEquals(t,
TimeUnit.MICROSECONDS.toMillis(t*1000L));
assertEquals(t,
TimeUnit.NANOSECONDS.toMillis(t*1000000L));
}
}
/**
* toSeconds correctly converts sample values in different units to
* seconds
*/
public void testToSeconds() {
for (long t = 0; t < 88888; ++t) {
assertEquals(t*60*60*24,
TimeUnit.DAYS.toSeconds(t));
assertEquals(t*60*60,
TimeUnit.HOURS.toSeconds(t));
assertEquals(t*60,
TimeUnit.MINUTES.toSeconds(t));
assertEquals(t,
TimeUnit.SECONDS.toSeconds(t));
assertEquals(t,
TimeUnit.MILLISECONDS.toSeconds(t*1000L));
assertEquals(t,
TimeUnit.MICROSECONDS.toSeconds(t*1000000L));
assertEquals(t,
TimeUnit.NANOSECONDS.toSeconds(t*1000000000L));
}
}
/**
* toMinutes correctly converts sample values in different units to
* minutes
*/
public void testToMinutes() {
for (long t = 0; t < 88888; ++t) {
assertEquals(t*60*24,
TimeUnit.DAYS.toMinutes(t));
assertEquals(t*60,
TimeUnit.HOURS.toMinutes(t));
assertEquals(t,
TimeUnit.MINUTES.toMinutes(t));
assertEquals(t,
TimeUnit.SECONDS.toMinutes(t*60));
assertEquals(t,
TimeUnit.MILLISECONDS.toMinutes(t*1000L*60));
assertEquals(t,
TimeUnit.MICROSECONDS.toMinutes(t*1000000L*60));
assertEquals(t,
TimeUnit.NANOSECONDS.toMinutes(t*1000000000L*60));
}
}
/**
* toHours correctly converts sample values in different units to
* hours
*/
public void testToHours() {
for (long t = 0; t < 88888; ++t) {
assertEquals(t*24,
TimeUnit.DAYS.toHours(t));
assertEquals(t,
TimeUnit.HOURS.toHours(t));
assertEquals(t,
TimeUnit.MINUTES.toHours(t*60));
assertEquals(t,
TimeUnit.SECONDS.toHours(t*60*60));
assertEquals(t,
TimeUnit.MILLISECONDS.toHours(t*1000L*60*60));
assertEquals(t,
TimeUnit.MICROSECONDS.toHours(t*1000000L*60*60));
assertEquals(t,
TimeUnit.NANOSECONDS.toHours(t*1000000000L*60*60));
}
}
/**
* toDays correctly converts sample values in different units to
* days
*/
public void testToDays() {
for (long t = 0; t < 88888; ++t) {
assertEquals(t,
TimeUnit.DAYS.toDays(t));
assertEquals(t,
TimeUnit.HOURS.toDays(t*24));
assertEquals(t,
TimeUnit.MINUTES.toDays(t*60*24));
assertEquals(t,
TimeUnit.SECONDS.toDays(t*60*60*24));
assertEquals(t,
TimeUnit.MILLISECONDS.toDays(t*1000L*60*60*24));
assertEquals(t,
TimeUnit.MICROSECONDS.toDays(t*1000000L*60*60*24));
assertEquals(t,
TimeUnit.NANOSECONDS.toDays(t*1000000000L*60*60*24));
}
}
/**
* convert saturates positive too-large values to Long.MAX_VALUE
* and negative to LONG.MIN_VALUE
*/
public void testConvertSaturate() {
assertEquals(Long.MAX_VALUE,
TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
TimeUnit.SECONDS));
assertEquals(Long.MIN_VALUE,
TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
TimeUnit.SECONDS));
assertEquals(Long.MAX_VALUE,
TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
TimeUnit.MINUTES));
assertEquals(Long.MIN_VALUE,
TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
TimeUnit.MINUTES));
assertEquals(Long.MAX_VALUE,
TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
TimeUnit.HOURS));
assertEquals(Long.MIN_VALUE,
TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
TimeUnit.HOURS));
assertEquals(Long.MAX_VALUE,
TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
TimeUnit.DAYS));
assertEquals(Long.MIN_VALUE,
TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
TimeUnit.DAYS));
}
/**
* toNanos saturates positive too-large values to Long.MAX_VALUE
* and negative to LONG.MIN_VALUE
*/
public void testToNanosSaturate() {
assertEquals(Long.MAX_VALUE,
TimeUnit.MILLISECONDS.toNanos(Long.MAX_VALUE / 2));
assertEquals(Long.MIN_VALUE,
TimeUnit.MILLISECONDS.toNanos(-Long.MAX_VALUE / 3));
}
/**
* toString returns name of unit
*/
public void testToString() {
assertEquals("SECONDS", TimeUnit.SECONDS.toString());
}
/**
* name returns name of unit
*/
public void testName() {
assertEquals("SECONDS", TimeUnit.SECONDS.name());
}
/**
* Timed wait without holding lock throws
* IllegalMonitorStateException
*/
public void testTimedWait_IllegalMonitorException() {
Thread t = newStartedThread(new CheckedRunnable() {
public void realRun() throws InterruptedException {
Object o = new Object();
TimeUnit tu = TimeUnit.MILLISECONDS;
try {
tu.timedWait(o, LONG_DELAY_MS);
threadShouldThrow();
} catch (IllegalMonitorStateException success) {}
}});
awaitTermination(t);
}
/**
* timedWait throws InterruptedException when interrupted
*/
public void testTimedWait_Interruptible() {
final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
Thread t = newStartedThread(new CheckedRunnable() {
public void realRun() throws InterruptedException {
Object o = new Object();
TimeUnit tu = TimeUnit.MILLISECONDS;
Thread.currentThread().interrupt();
try {
synchronized (o) {
tu.timedWait(o, LONG_DELAY_MS);
}
shouldThrow();
} catch (InterruptedException success) {}
assertFalse(Thread.interrupted());
pleaseInterrupt.countDown();
try {
synchronized (o) {
tu.timedWait(o, LONG_DELAY_MS);
}
shouldThrow();
} catch (InterruptedException success) {}
assertFalse(Thread.interrupted());
}});
await(pleaseInterrupt);
assertThreadStaysAlive(t);
t.interrupt();
awaitTermination(t);
}
/**
* timedJoin throws InterruptedException when interrupted
*/
public void testTimedJoin_Interruptible() {
final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
final Thread s = newStartedThread(new CheckedInterruptedRunnable() {
public void realRun() throws InterruptedException {
Thread.sleep(LONG_DELAY_MS);
}});
final Thread t = newStartedThread(new CheckedRunnable() {
public void realRun() throws InterruptedException {
TimeUnit tu = TimeUnit.MILLISECONDS;
Thread.currentThread().interrupt();
try {
tu.timedJoin(s, LONG_DELAY_MS);
shouldThrow();
} catch (InterruptedException success) {}
assertFalse(Thread.interrupted());
pleaseInterrupt.countDown();
try {
tu.timedJoin(s, LONG_DELAY_MS);
shouldThrow();
} catch (InterruptedException success) {}
assertFalse(Thread.interrupted());
}});
await(pleaseInterrupt);
assertThreadStaysAlive(t);
t.interrupt();
awaitTermination(t);
s.interrupt();
awaitTermination(s);
}
/**
* timedSleep throws InterruptedException when interrupted
*/
public void testTimedSleep_Interruptible() {
final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
Thread t = newStartedThread(new CheckedRunnable() {
public void realRun() throws InterruptedException {
TimeUnit tu = TimeUnit.MILLISECONDS;
Thread.currentThread().interrupt();
try {
tu.sleep(LONG_DELAY_MS);
shouldThrow();
} catch (InterruptedException success) {}
assertFalse(Thread.interrupted());
pleaseInterrupt.countDown();
try {
tu.sleep(LONG_DELAY_MS);
shouldThrow();
} catch (InterruptedException success) {}
assertFalse(Thread.interrupted());
}});
await(pleaseInterrupt);
assertThreadStaysAlive(t);
t.interrupt();
awaitTermination(t);
}
/**
* a deserialized serialized unit is the same instance
*/
public void testSerialization() throws Exception {
TimeUnit x = TimeUnit.MILLISECONDS;
assertSame(x, serialClone(x));
}
}