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/*
* Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
* 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
* questions.
*/
/**
* @test
* @summary Test Thread.sleep(Duration)
* @run junit SleepWithDuration
*/
import java.time.Duration;
import java.util.concurrent.TimeUnit;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
class SleepWithDuration {
/**
* Basic test for sleep(Duration).
*/
@Test
void testSleep() throws Exception {
// sleep for 2 seconds
long start = millisTime();
Thread.sleep(Duration.ofMillis(2000));
expectDuration(start, /*min*/1900, /*max*/20_000);
Thread.sleep(Duration.ofNanos(-1));
Thread.sleep(Duration.ofNanos(0));
Thread.sleep(Duration.ofNanos(1));
assertThrows(NullPointerException.class, () -> Thread.sleep(null));
}
/**
* Test Thread.sleep with interrupt status set.
*/
@Test
void testSleepWithInterruptStatusSet() throws Exception {
Thread.currentThread().interrupt();
try {
Thread.sleep(Duration.ofNanos(0));
fail();
} catch (InterruptedException e) {
assertFalse(Thread.interrupted());
}
Thread.currentThread().interrupt();
try {
Thread.sleep(Duration.ofSeconds(2));
fail();
} catch (InterruptedException e) {
assertFalse(Thread.interrupted());
}
}
/**
* Test interrupting Thread.sleep.
*/
@Test
void testInterruptSleep() throws Exception {
// schedule current thread to be interrupted after 1s
Thread targetThread = Thread.currentThread();
Thread wakerThread = new Thread(() -> {
try {
Thread.sleep(1000);
targetThread.interrupt();
} catch (Exception e) {
e.printStackTrace();
}
});
wakerThread.start();
try {
Thread.sleep(Duration.ofSeconds(60));
fail();
} catch (InterruptedException e) {
// interrupt status should be cleared
assertFalse(Thread.interrupted());
} finally {
wakerThread.join();
}
}
/**
* Returns the current time in milliseconds.
*/
private static long millisTime() {
long now = System.nanoTime();
return TimeUnit.MILLISECONDS.convert(now, TimeUnit.NANOSECONDS);
}
/**
* Check the duration of a task
* @param start start time, in milliseconds
* @param min minimum expected duration, in milliseconds
* @param max maximum expected duration, in milliseconds
* @return the duration (now - start), in milliseconds
*/
private static void expectDuration(long start, long min, long max) {
long duration = millisTime() - start;
assertTrue(duration >= min,
"Duration " + duration + "ms, expected >= " + min + "ms");
assertTrue(duration <= max,
"Duration " + duration + "ms, expected <= " + max + "ms");
}
}
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