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/*
* Copyright Amazon.com Inc. 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 Sanity test Thread.sleep behavior
* @run junit SleepSanity
*/
import java.util.concurrent.TimeUnit;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
public class SleepSanity {
static final int[] TRY_MILLIS = new int[] { 0, 1, 10, 100, 1_000 };
static final int[] TRY_NANOS = new int[] { 0, 1, 10, 100, 1_000, 10_000, 100_000, 999_999 };
@Test
void testMillis() throws Exception {
testIAE(() -> Thread.sleep(-1), "timeout value is negative");
testTimeout(() -> Thread.sleep(10_000), 5_000);
testTimeout(() -> Thread.sleep(Integer.MAX_VALUE), 5_000);
testTimeout(() -> Thread.sleep(Long.MAX_VALUE), 5_000);
for (final int millis : TRY_MILLIS) {
testTimes(() -> Thread.sleep(millis), millis, 20_000);
}
}
@Test
void testMillisNanos() throws Exception {
testIAE(() -> Thread.sleep(-1), "timeout value is negative");
testIAE(() -> Thread.sleep(0, -1), "nanosecond timeout value out of range");
testIAE(() -> Thread.sleep(0, 1_000_000), "nanosecond timeout value out of range");
testIAE(() -> Thread.sleep(0, Integer.MAX_VALUE), "nanosecond timeout value out of range");
testTimeout(() -> Thread.sleep(10_000, 0), 5_000);
testTimeout(() -> Thread.sleep(Integer.MAX_VALUE, 0), 5_000);
testTimeout(() -> Thread.sleep(Long.MAX_VALUE, 0), 5_000);
testTimeout(() -> Thread.sleep(10_000, 999_999), 5_000);
testTimeout(() -> Thread.sleep(Integer.MAX_VALUE, 999_999), 5_000);
testTimeout(() -> Thread.sleep(Long.MAX_VALUE, 999_999), 5_000);
for (final int millis : TRY_MILLIS) {
for (final int nanos : TRY_NANOS) {
testTimes(() -> Thread.sleep(millis, nanos), millis, 20_000);
}
}
}
private static void testTimes(TestCase t, long millisMin, long millisMax) throws Exception {
long start = System.nanoTime();
t.run();
long end = System.nanoTime();
long duration = TimeUnit.NANOSECONDS.toMillis(end - start);
assertTrue(duration >= millisMin, "Duration " + duration + "ms, expected >= " + millisMin + "ms");
assertTrue(duration <= millisMax, "Duration " + duration + "ms, expected <= " + millisMax + "ms");
}
private static void testTimeout(TestCase t, long millis) throws Exception {
Thread captThread = Thread.currentThread();
Thread watcher = new Thread(() -> {
try {
Thread.sleep(millis);
} catch (InterruptedException ie) {
// Do nothing
}
captThread.interrupt();
});
watcher.setDaemon(true);
watcher.start();
try {
t.run();
fail("Exited before timeout");
} catch (InterruptedException ie) {
// Expected
}
watcher.join();
}
private static void testIAE(TestCase t, String msg) throws Exception {
try {
t.run();
fail("Should have thrown the IAE");
} catch (IllegalArgumentException iae) {
assertTrue(iae.getMessage().contains(msg),
"Thrown IAE does not contain the string: " + msg + " " + iae);
}
}
private interface TestCase {
void run() throws Exception;
}
}
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