/**
* 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.internal.operators;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import java.util.concurrent.TimeUnit;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InOrder;
import rx.Observable;
import rx.Observable.OnSubscribe;
import rx.Observer;
import rx.Scheduler;
import rx.Subscriber;
import rx.exceptions.TestException;
import rx.functions.Action0;
import rx.schedulers.TestScheduler;
import rx.subjects.PublishSubject;
public class OperatorThrottleFirstTest {
private TestScheduler scheduler;
private Scheduler.Worker innerScheduler;
private Observer<String> observer;
@Before
@SuppressWarnings("unchecked")
public void before() {
scheduler = new TestScheduler();
innerScheduler = scheduler.createWorker();
observer = mock(Observer.class);
}
@Test
public void testThrottlingWithCompleted() {
Observable<String> source = Observable.create(new OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> observer) {
publishNext(observer, 100, "one"); // publish as it's first
publishNext(observer, 300, "two"); // skip as it's last within the first 400
publishNext(observer, 900, "three"); // publish
publishNext(observer, 905, "four"); // skip
publishCompleted(observer, 1000); // Should be published as soon as the timeout expires.
}
});
Observable<String> sampled = source.throttleFirst(400, TimeUnit.MILLISECONDS, scheduler);
sampled.subscribe(observer);
InOrder inOrder = inOrder(observer);
scheduler.advanceTimeTo(1000, TimeUnit.MILLISECONDS);
inOrder.verify(observer, times(1)).onNext("one");
inOrder.verify(observer, times(0)).onNext("two");
inOrder.verify(observer, times(1)).onNext("three");
inOrder.verify(observer, times(0)).onNext("four");
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testThrottlingWithError() {
Observable<String> source = Observable.create(new OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> observer) {
Exception error = new TestException();
publishNext(observer, 100, "one"); // Should be published since it is first
publishNext(observer, 200, "two"); // Should be skipped since onError will arrive before the timeout expires
publishError(observer, 300, error); // Should be published as soon as the timeout expires.
}
});
Observable<String> sampled = source.throttleFirst(400, TimeUnit.MILLISECONDS, scheduler);
sampled.subscribe(observer);
InOrder inOrder = inOrder(observer);
scheduler.advanceTimeTo(400, TimeUnit.MILLISECONDS);
inOrder.verify(observer).onNext("one");
inOrder.verify(observer).onError(any(TestException.class));
inOrder.verifyNoMoreInteractions();
}
private <T> void publishCompleted(final Observer<T> observer, long delay) {
innerScheduler.schedule(new Action0() {
@Override
public void call() {
observer.onCompleted();
}
}, delay, TimeUnit.MILLISECONDS);
}
private <T> void publishError(final Observer<T> observer, long delay, final Exception error) {
innerScheduler.schedule(new Action0() {
@Override
public void call() {
observer.onError(error);
}
}, delay, TimeUnit.MILLISECONDS);
}
private <T> void publishNext(final Observer<T> observer, long delay, final T value) {
innerScheduler.schedule(new Action0() {
@Override
public void call() {
observer.onNext(value);
}
}, delay, TimeUnit.MILLISECONDS);
}
@Test
public void testThrottle() {
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
TestScheduler s = new TestScheduler();
PublishSubject<Integer> o = PublishSubject.create();
o.throttleFirst(500, TimeUnit.MILLISECONDS, s).subscribe(observer);
// send events with simulated time increments
s.advanceTimeTo(0, TimeUnit.MILLISECONDS);
o.onNext(1); // deliver
o.onNext(2); // skip
s.advanceTimeTo(501, TimeUnit.MILLISECONDS);
o.onNext(3); // deliver
s.advanceTimeTo(600, TimeUnit.MILLISECONDS);
o.onNext(4); // skip
s.advanceTimeTo(700, TimeUnit.MILLISECONDS);
o.onNext(5); // skip
o.onNext(6); // skip
s.advanceTimeTo(1001, TimeUnit.MILLISECONDS);
o.onNext(7); // deliver
s.advanceTimeTo(1501, TimeUnit.MILLISECONDS);
o.onCompleted();
InOrder inOrder = inOrder(observer);
inOrder.verify(observer).onNext(1);
inOrder.verify(observer).onNext(3);
inOrder.verify(observer).onNext(7);
inOrder.verify(observer).onCompleted();
inOrder.verifyNoMoreInteractions();
}
}