/**
* 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.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import java.util.NoSuchElementException;
import org.junit.Test;
import org.mockito.InOrder;
import rx.Observable;
import rx.Observer;
import rx.functions.Func1;
public class OperatorLastTest {
@Test
public void testLastWithElements() {
Observable<Integer> last = Observable.just(1, 2, 3).last();
assertEquals(3, last.toBlocking().single().intValue());
}
@Test(expected = NoSuchElementException.class)
public void testLastWithNoElements() {
Observable<?> last = Observable.empty().last();
last.toBlocking().single();
}
@Test
public void testLastMultiSubscribe() {
Observable<Integer> last = Observable.just(1, 2, 3).last();
assertEquals(3, last.toBlocking().single().intValue());
assertEquals(3, last.toBlocking().single().intValue());
}
@Test
public void testLastViaObservable() {
Observable.just(1, 2, 3).last();
}
@Test
public void testLast() {
Observable<Integer> observable = Observable.just(1, 2, 3).last();
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(3);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testLastWithOneElement() {
Observable<Integer> observable = Observable.just(1).last();
@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 testLastWithEmpty() {
Observable<Integer> observable = Observable.<Integer> empty().last();
@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 testLastWithPredicate() {
Observable<Integer> observable = Observable.just(1, 2, 3, 4, 5, 6)
.last(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(6);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testLastWithPredicateAndOneElement() {
Observable<Integer> observable = Observable.just(1, 2).last(
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 testLastWithPredicateAndEmpty() {
Observable<Integer> observable = Observable.just(1).last(
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 testLastOrDefault() {
Observable<Integer> observable = Observable.just(1, 2, 3)
.lastOrDefault(4);
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
observable.subscribe(observer);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(3);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testLastOrDefaultWithOneElement() {
Observable<Integer> observable = Observable.just(1).lastOrDefault(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 testLastOrDefaultWithEmpty() {
Observable<Integer> observable = Observable.<Integer> empty()
.lastOrDefault(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 testLastOrDefaultWithPredicate() {
Observable<Integer> observable = Observable.just(1, 2, 3, 4, 5, 6)
.lastOrDefault(8, 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(6);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testLastOrDefaultWithPredicateAndOneElement() {
Observable<Integer> observable = Observable.just(1, 2).lastOrDefault(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 testLastOrDefaultWithPredicateAndEmpty() {
Observable<Integer> observable = Observable.just(1).lastOrDefault(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();
}
}