/**
* 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.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import java.util.concurrent.TimeUnit;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InOrder;
import rx.*;
import rx.Observable.OnSubscribe;
import rx.functions.Action0;
import rx.schedulers.TestScheduler;
import rx.subjects.PublishSubject;
import rx.subscriptions.Subscriptions;
public class OperatorSampleTest {
private TestScheduler scheduler;
private Scheduler.Worker innerScheduler;
private Observer<Long> observer;
private Observer<Object> observer2;
@Before
@SuppressWarnings("unchecked")
// due to mocking
public void before() {
scheduler = new TestScheduler();
innerScheduler = scheduler.createWorker();
observer = mock(Observer.class);
observer2 = mock(Observer.class);
}
@Test
public void testSample() {
Observable<Long> source = Observable.create(new OnSubscribe<Long>() {
@Override
public void call(final Subscriber<? super Long> observer1) {
innerScheduler.schedule(new Action0() {
@Override
public void call() {
observer1.onNext(1L);
}
}, 1, TimeUnit.SECONDS);
innerScheduler.schedule(new Action0() {
@Override
public void call() {
observer1.onNext(2L);
}
}, 2, TimeUnit.SECONDS);
innerScheduler.schedule(new Action0() {
@Override
public void call() {
observer1.onCompleted();
}
}, 3, TimeUnit.SECONDS);
}
});
Observable<Long> sampled = source.sample(400L, TimeUnit.MILLISECONDS, scheduler);
sampled.subscribe(observer);
InOrder inOrder = inOrder(observer);
scheduler.advanceTimeTo(800L, TimeUnit.MILLISECONDS);
verify(observer, never()).onNext(any(Long.class));
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(1200L, TimeUnit.MILLISECONDS);
inOrder.verify(observer, times(1)).onNext(1L);
verify(observer, never()).onNext(2L);
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(1600L, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onNext(1L);
verify(observer, never()).onNext(2L);
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(2000L, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onNext(1L);
inOrder.verify(observer, times(1)).onNext(2L);
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(3000L, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onNext(1L);
inOrder.verify(observer, never()).onNext(2L);
verify(observer, times(1)).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
}
@Test
public void sampleWithSamplerNormal() {
PublishSubject<Integer> source = PublishSubject.create();
PublishSubject<Integer> sampler = PublishSubject.create();
Observable<Integer> m = source.sample(sampler);
m.subscribe(observer2);
source.onNext(1);
source.onNext(2);
sampler.onNext(1);
source.onNext(3);
source.onNext(4);
sampler.onNext(2);
source.onCompleted();
sampler.onNext(3);
InOrder inOrder = inOrder(observer2);
inOrder.verify(observer2, never()).onNext(1);
inOrder.verify(observer2, times(1)).onNext(2);
inOrder.verify(observer2, never()).onNext(3);
inOrder.verify(observer2, times(1)).onNext(4);
inOrder.verify(observer2, times(1)).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
}
@Test
public void sampleWithSamplerNoDuplicates() {
PublishSubject<Integer> source = PublishSubject.create();
PublishSubject<Integer> sampler = PublishSubject.create();
Observable<Integer> m = source.sample(sampler);
m.subscribe(observer2);
source.onNext(1);
source.onNext(2);
sampler.onNext(1);
sampler.onNext(1);
source.onNext(3);
source.onNext(4);
sampler.onNext(2);
sampler.onNext(2);
source.onCompleted();
sampler.onNext(3);
InOrder inOrder = inOrder(observer2);
inOrder.verify(observer2, never()).onNext(1);
inOrder.verify(observer2, times(1)).onNext(2);
inOrder.verify(observer2, never()).onNext(3);
inOrder.verify(observer2, times(1)).onNext(4);
inOrder.verify(observer2, times(1)).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
}
@Test
public void sampleWithSamplerTerminatingEarly() {
PublishSubject<Integer> source = PublishSubject.create();
PublishSubject<Integer> sampler = PublishSubject.create();
Observable<Integer> m = source.sample(sampler);
m.subscribe(observer2);
source.onNext(1);
source.onNext(2);
sampler.onNext(1);
sampler.onCompleted();
source.onNext(3);
source.onNext(4);
InOrder inOrder = inOrder(observer2);
inOrder.verify(observer2, never()).onNext(1);
inOrder.verify(observer2, times(1)).onNext(2);
inOrder.verify(observer2, times(1)).onCompleted();
inOrder.verify(observer2, never()).onNext(any());
verify(observer, never()).onError(any(Throwable.class));
}
@Test
public void sampleWithSamplerEmitAndTerminate() {
PublishSubject<Integer> source = PublishSubject.create();
PublishSubject<Integer> sampler = PublishSubject.create();
Observable<Integer> m = source.sample(sampler);
m.subscribe(observer2);
source.onNext(1);
source.onNext(2);
sampler.onNext(1);
source.onNext(3);
source.onCompleted();
sampler.onNext(2);
sampler.onCompleted();
InOrder inOrder = inOrder(observer2);
inOrder.verify(observer2, never()).onNext(1);
inOrder.verify(observer2, times(1)).onNext(2);
inOrder.verify(observer2, never()).onNext(3);
inOrder.verify(observer2, times(1)).onCompleted();
inOrder.verify(observer2, never()).onNext(any());
verify(observer, never()).onError(any(Throwable.class));
}
@Test
public void sampleWithSamplerEmptySource() {
PublishSubject<Integer> source = PublishSubject.create();
PublishSubject<Integer> sampler = PublishSubject.create();
Observable<Integer> m = source.sample(sampler);
m.subscribe(observer2);
source.onCompleted();
sampler.onNext(1);
InOrder inOrder = inOrder(observer2);
inOrder.verify(observer2, times(1)).onCompleted();
verify(observer2, never()).onNext(any());
verify(observer, never()).onError(any(Throwable.class));
}
@Test
public void sampleWithSamplerSourceThrows() {
PublishSubject<Integer> source = PublishSubject.create();
PublishSubject<Integer> sampler = PublishSubject.create();
Observable<Integer> m = source.sample(sampler);
m.subscribe(observer2);
source.onNext(1);
source.onError(new RuntimeException("Forced failure!"));
sampler.onNext(1);
InOrder inOrder = inOrder(observer2);
inOrder.verify(observer2, times(1)).onError(any(Throwable.class));
verify(observer2, never()).onNext(any());
verify(observer, never()).onCompleted();
}
@Test
public void sampleWithSamplerThrows() {
PublishSubject<Integer> source = PublishSubject.create();
PublishSubject<Integer> sampler = PublishSubject.create();
Observable<Integer> m = source.sample(sampler);
m.subscribe(observer2);
source.onNext(1);
sampler.onNext(1);
sampler.onError(new RuntimeException("Forced failure!"));
InOrder inOrder = inOrder(observer2);
inOrder.verify(observer2, times(1)).onNext(1);
inOrder.verify(observer2, times(1)).onError(any(RuntimeException.class));
verify(observer, never()).onCompleted();
}
@Test
public void testSampleUnsubscribe() {
final Subscription s = mock(Subscription.class);
Observable<Integer> o = Observable.create(
new OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> subscriber) {
subscriber.add(s);
}
}
);
o.throttleLast(1, TimeUnit.MILLISECONDS).subscribe().unsubscribe();
verify(s).unsubscribe();
}
}