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/*
* ============LICENSE_START=======================================================
* Common Utils-Test
* ================================================================================
* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.utils.time;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
/**
* Class to test TestTimeMulti.
*/
public class TestTimeMultiTest {
private static final int NTHREADS = 10;
private static final int NTIMES = 100;
private static final long WAIT_SEC = 5L;
private static final long MIN_SLEEP_MS = 5L;
private TestTimeMulti ttm;
private Semaphore done;
@Test
public void test() throws Exception {
ttm = new TestTimeMulti(NTHREADS);
done = new Semaphore(0);
final long tbeg = ttm.getMillis();
// create threads
List<MyThread> threads = new ArrayList<>(NTHREADS);
for (int x = 0; x < NTHREADS; ++x) {
threads.add(new MyThread(x + MIN_SLEEP_MS));
}
// launch threads
for (MyThread thr : threads) {
thr.start();
}
// wait for each one to complete
for (MyThread thr : threads) {
assertTrue("complete " + thr.getSleepMs(), done.tryAcquire(WAIT_SEC, TimeUnit.SECONDS));
ttm.threadCompleted();
}
// check results
for (MyThread thr : threads) {
assertEquals("time " + thr.getSleepMs(), thr.texpected, thr.tactual);
}
assertTrue(ttm.getMillis() >= tbeg + NTIMES * MIN_SLEEP_MS);
}
private class MyThread extends Thread {
private final long sleepMs;
private volatile long texpected;
private volatile long tactual;
public MyThread(long sleepMs) {
this.sleepMs = sleepMs;
this.setDaemon(true);
}
public long getSleepMs() {
return sleepMs;
}
@Override
public void run() {
try {
for (int x = 0; x < NTIMES; ++x) {
texpected = ttm.getMillis() + sleepMs;
ttm.sleep(sleepMs);
if ((tactual = ttm.getMillis()) != texpected) {
break;
}
if ((tactual = ttm.getDate().getTime()) != texpected) {
break;
}
}
} catch (InterruptedException expected) {
Thread.currentThread().interrupt();
}
done.release();
}
}
}
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