/**
* 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.junit.Assert.assertEquals;
import static org.mockito.Matchers.isA;
import static org.mockito.Mockito.*;
import java.util.NoSuchElementException;
import org.junit.Test;
import org.mockito.InOrder;
import rx.Observable;
import rx.Observer;
import rx.Subscriber;
import rx.functions.Func1;
import rx.functions.Func2;
public class OperatorSingleTest {
@Test
public void testSingle() {
Observable<Integer> observable = Observable.just(1).single();
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(1);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleWithTooManyElements() {
Observable<Integer> observable = Observable.just(1, 2).single();
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onError(
isA(IllegalArgumentException.class));
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleWithEmpty() {
Observable<Integer> observable = Observable.<Integer> empty().single();
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onError(
isA(NoSuchElementException.class));
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleWithPredicate() {
Observable<Integer> observable = Observable.just(1, 2).single(
new Func1<Integer, Boolean>() {
@Override
public Boolean call(Integer t1) {
return t1 % 2 == 0;
}
});
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(2);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleWithPredicateAndTooManyElements() {
Observable<Integer> observable = Observable.just(1, 2, 3, 4).single(
new Func1<Integer, Boolean>() {
@Override
public Boolean call(Integer t1) {
return t1 % 2 == 0;
}
});
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onError(
isA(IllegalArgumentException.class));
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleWithPredicateAndEmpty() {
Observable<Integer> observable = Observable.just(1).single(
new Func1<Integer, Boolean>() {
@Override
public Boolean call(Integer t1) {
return t1 % 2 == 0;
}
});
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onError(
isA(NoSuchElementException.class));
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleOrDefault() {
Observable<Integer> observable = Observable.just(1).singleOrDefault(2);
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(1);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleOrDefaultWithTooManyElements() {
Observable<Integer> observable = Observable.just(1, 2).singleOrDefault(
3);
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onError(
isA(IllegalArgumentException.class));
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleOrDefaultWithEmpty() {
Observable<Integer> observable = Observable.<Integer> empty()
.singleOrDefault(1);
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(1);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleOrDefaultWithPredicate() {
Observable<Integer> observable = Observable.just(1, 2).singleOrDefault(
4, new Func1<Integer, Boolean>() {
@Override
public Boolean call(Integer t1) {
return t1 % 2 == 0;
}
});
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(2);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleOrDefaultWithPredicateAndTooManyElements() {
Observable<Integer> observable = Observable.just(1, 2, 3, 4)
.singleOrDefault(6, new Func1<Integer, Boolean>() {
@Override
public Boolean call(Integer t1) {
return t1 % 2 == 0;
}
});
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onError(
isA(IllegalArgumentException.class));
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleOrDefaultWithPredicateAndEmpty() {
Observable<Integer> observable = Observable.just(1).singleOrDefault(2,
new Func1<Integer, Boolean>() {
@Override
public Boolean call(Integer t1) {
return t1 % 2 == 0;
}
});
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(2);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testSingleWithBackpressure() {
Observable<Integer> observable = Observable.just(1, 2).single();
Subscriber<Integer> subscriber = spy(new Subscriber<Integer>() {
@Override
public void onStart() {
request(1);
}
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(Integer integer) {
request(1);
}
});
observable.subscribe(subscriber);
InOrder inOrder = inOrder(subscriber);
inOrder.verify(subscriber, times(1)).onError(isA(IllegalArgumentException.class));
inOrder.verifyNoMoreInteractions();
}
@Test(timeout = 30000)
public void testIssue1527() throws InterruptedException {
//https://github.com/ReactiveX/RxJava/pull/1527
Observable<Integer> source = Observable.just(1, 2, 3, 4, 5, 6);
Observable<Integer> reduced = source.reduce(new Func2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer i1, Integer i2) {
return i1 + i2;
}
});
Integer r = reduced.toBlocking().first();
assertEquals(21, r.intValue());
}
}