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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019 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.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.util.Collections;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import org.junit.Before;
import org.junit.Test;
public class PseudoScheduledExecutorServiceTest {
private static final long DELAY_MS = 100L;
private static final long PERIOD_MS = 200L;
private int ran;
private int called;
private TestTimeMulti currentTime;
private PseudoScheduledExecutorService svc;
/**
* Sets up objects, including {@link #svc}.
*/
@Before
public void setUp() {
ran = 0;
called = 0;
currentTime = new TestTimeMulti();
svc = new PseudoScheduledExecutorService(currentTime);
}
@Test
public void testShutdown() {
// submit some tasks
svc.submit(new MyRun());
svc.schedule(new MyRun(), 1L, TimeUnit.SECONDS);
svc.shutdown();
assertTrue(svc.isShutdown());
// task should have been removed
assertTrue(currentTime.isEmpty());
}
@Test
public void testShutdownNow() {
// submit some tasks
svc.submit(new MyRun());
svc.schedule(new MyRun(), 1L, TimeUnit.SECONDS);
svc.shutdownNow();
assertTrue(svc.isShutdown());
// task should have been removed
assertTrue(currentTime.isEmpty());
}
@Test
public void testIsShutdown_testIsTerminated() {
assertFalse(svc.isShutdown());
assertFalse(svc.isTerminated());
svc.shutdown();
assertTrue(svc.isShutdown());
assertTrue(svc.isTerminated());
}
@Test
public void testAwaitTermination() throws InterruptedException {
assertFalse(svc.awaitTermination(1L, TimeUnit.SECONDS));
svc.shutdown();
assertTrue(svc.awaitTermination(1L, TimeUnit.SECONDS));
}
@Test
public void testSubmitCallableOfT() throws Exception {
Future<Integer> future = svc.submit(new MyCallable());
currentTime.runOneTask(0);
assertEquals(1, called);
assertEquals(1, future.get().intValue());
// nothing re-queued
assertTrue(currentTime.isEmpty());
}
@Test
public void testSubmitRunnableT() throws Exception {
Future<Integer> future = svc.submit(new MyRun(), 2);
currentTime.runOneTask(0);
assertEquals(1, ran);
assertEquals(2, future.get().intValue());
// nothing re-queued
assertTrue(currentTime.isEmpty());
}
@Test
public void testSubmitRunnable() throws Exception {
assertNotNull(svc.submit(new MyRun()));
currentTime.runOneTask(0);
assertEquals(1, ran);
// nothing re-queued
assertTrue(currentTime.isEmpty());
}
@Test
public void testInvokeAllCollectionOfQextendsCallableOfT() {
assertThatThrownBy(() -> svc.invokeAll(Collections.emptyList()))
.isInstanceOf(UnsupportedOperationException.class);
}
@Test
public void testInvokeAllCollectionOfQextendsCallableOfTLongTimeUnit() {
assertThatThrownBy(() -> svc.invokeAll(Collections.emptyList(), 1, TimeUnit.MILLISECONDS))
.isInstanceOf(UnsupportedOperationException.class);
}
@Test
public void testInvokeAnyCollectionOfQextendsCallableOfT() {
assertThatThrownBy(() -> svc.invokeAny(Collections.emptyList()))
.isInstanceOf(UnsupportedOperationException.class);
}
@Test
public void testInvokeAnyCollectionOfQextendsCallableOfTLongTimeUnit() {
assertThatThrownBy(() -> svc.invokeAny(Collections.emptyList(), 1, TimeUnit.MILLISECONDS))
.isInstanceOf(UnsupportedOperationException.class);
}
@Test
public void testExecute() throws InterruptedException {
svc.execute(new MyRun());
currentTime.runOneTask(0);
assertEquals(1, ran);
// nothing re-queued
assertTrue(currentTime.isEmpty());
}
@Test
public void testScheduleRunnableLongTimeUnit() throws InterruptedException {
assertNotNull(svc.schedule(new MyRun(), DELAY_MS, TimeUnit.MILLISECONDS));
assertEquals(DELAY_MS, oneTaskElapsedTime());
assertEquals(1, ran);
// verify nothing re-scheduled
assertTrue(currentTime.isEmpty());
}
@Test
public void testScheduleCallableOfVLongTimeUnit() throws Exception {
ScheduledFuture<Integer> future = svc.schedule(new MyCallable(), DELAY_MS, TimeUnit.MILLISECONDS);
assertEquals(DELAY_MS, oneTaskElapsedTime());
assertEquals(1, called);
assertEquals(1, future.get().intValue());
// verify nothing re-scheduled
assertTrue(currentTime.isEmpty());
}
@Test
public void testScheduleAtFixedRate() throws InterruptedException {
final ScheduledFuture<?> future =
svc.scheduleAtFixedRate(new MyRun(), DELAY_MS, PERIOD_MS, TimeUnit.MILLISECONDS);
assertEquals(DELAY_MS, oneTaskElapsedTime());
assertEquals(1, ran);
assertEquals(PERIOD_MS, oneTaskElapsedTime());
assertEquals(2, ran);
assertEquals(PERIOD_MS, oneTaskElapsedTime());
assertEquals(3, ran);
future.cancel(false);
// should not actually execute
assertEquals(0, oneTaskElapsedTime());
assertEquals(3, ran);
// verify nothing re-scheduled
assertTrue(currentTime.isEmpty());
}
@Test
public void testScheduleWithFixedDelay() throws InterruptedException {
final ScheduledFuture<?> future =
svc.scheduleWithFixedDelay(new MyRun(), DELAY_MS, PERIOD_MS, TimeUnit.MILLISECONDS);
assertEquals(DELAY_MS, oneTaskElapsedTime());
assertEquals(1, ran);
assertEquals(PERIOD_MS, oneTaskElapsedTime());
assertEquals(2, ran);
assertEquals(PERIOD_MS, oneTaskElapsedTime());
assertEquals(3, ran);
future.cancel(false);
// should not actually execute
assertEquals(0, oneTaskElapsedTime());
assertEquals(3, ran);
// verify nothing re-scheduled
assertTrue(currentTime.isEmpty());
}
/**
* Runs a single task and returns its elapsed (pseudo) time.
*
* @return the elapsed time taken to run the task
* @throws InterruptedException if the thread is interrupted
*/
private long oneTaskElapsedTime() throws InterruptedException {
final long tbegin = currentTime.getMillis();
currentTime.runOneTask(0);
return (currentTime.getMillis() - tbegin);
}
private class MyRun implements Runnable {
@Override
public void run() {
++ran;
}
}
private class MyCallable implements Callable<Integer> {
@Override
public Integer call() {
return ++called;
}
}
}
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