/**
* Copyright 2014 Netflix, Inc.
*
* 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.
*/
package rx;
import static org.junit.Assert.assertTrue;
import java.util.*;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
import rx.functions.Action0;
import rx.schedulers.Schedulers;
public class SchedulerWorkerTest {
static final class CustomDriftScheduler extends Scheduler {
public volatile long drift;
@Override
public Worker createWorker() {
final Worker w = Schedulers.computation().createWorker();
return new Worker() {
@Override
public void unsubscribe() {
w.unsubscribe();
}
@Override
public boolean isUnsubscribed() {
return w.isUnsubscribed();
}
@Override
public Subscription schedule(Action0 action) {
return w.schedule(action);
}
@Override
public Subscription schedule(Action0 action, long delayTime, TimeUnit unit) {
return w.schedule(action, delayTime, unit);
}
@Override
public long now() {
return super.now() + drift;
}
};
}
@Override
public long now() {
return super.now() + drift;
}
}
@Test
public void testCurrentTimeDriftBackwards() throws Exception {
CustomDriftScheduler s = new CustomDriftScheduler();
Scheduler.Worker w = s.createWorker();
try {
final List times = new ArrayList();
Subscription d = w.schedulePeriodically(new Action0() {
@Override
public void call() {
times.add(System.currentTimeMillis());
}
}, 100, 100, TimeUnit.MILLISECONDS);
Thread.sleep(150);
s.drift = -1000 - TimeUnit.NANOSECONDS.toMillis(Scheduler.CLOCK_DRIFT_TOLERANCE_NANOS);
Thread.sleep(400);
d.unsubscribe();
Thread.sleep(150);
System.out.println("Runs: " + times.size());
for (int i = 0; i < times.size() - 1 ; i++) {
long diff = times.get(i + 1) - times.get(i);
System.out.println("Diff #" + i + ": " + diff);
assertTrue("" + i + ":" + diff, diff < 150 && diff > 50);
}
assertTrue("Too few invocations: " + times.size(), times.size() > 2);
} finally {
w.unsubscribe();
}
}
@Test
public void testCurrentTimeDriftForwards() throws Exception {
CustomDriftScheduler s = new CustomDriftScheduler();
Scheduler.Worker w = s.createWorker();
try {
final List times = new ArrayList();
Subscription d = w.schedulePeriodically(new Action0() {
@Override
public void call() {
times.add(System.currentTimeMillis());
}
}, 100, 100, TimeUnit.MILLISECONDS);
Thread.sleep(150);
s.drift = 1000 + TimeUnit.NANOSECONDS.toMillis(Scheduler.CLOCK_DRIFT_TOLERANCE_NANOS);
Thread.sleep(400);
d.unsubscribe();
Thread.sleep(150);
System.out.println("Runs: " + times.size());
assertTrue(times.size() > 2);
for (int i = 0; i < times.size() - 1 ; i++) {
long diff = times.get(i + 1) - times.get(i);
System.out.println("Diff #" + i + ": " + diff);
assertTrue("Diff out of range: " + diff, diff < 250 && diff > 50);
}
} finally {
w.unsubscribe();
}
}
}