/**
* 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.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import org.junit.Test;
import rx.Observable;
import rx.Observer;
import rx.internal.operators.OperatorSkip;
public class OperatorSkipTest {
@Test
public void testSkipNegativeElements() {
Observable<String> skip = Observable.just("one", "two", "three").lift(new OperatorSkip<String>(-99));
@SuppressWarnings("unchecked")
Observer<String> observer = mock(Observer.class);
skip.subscribe(observer);
verify(observer, times(1)).onNext("one");
verify(observer, times(1)).onNext("two");
verify(observer, times(1)).onNext("three");
verify(observer, never()).onError(any(Throwable.class));
verify(observer, times(1)).onCompleted();
}
@Test
public void testSkipZeroElements() {
Observable<String> skip = Observable.just("one", "two", "three").lift(new OperatorSkip<String>(0));
@SuppressWarnings("unchecked")
Observer<String> observer = mock(Observer.class);
skip.subscribe(observer);
verify(observer, times(1)).onNext("one");
verify(observer, times(1)).onNext("two");
verify(observer, times(1)).onNext("three");
verify(observer, never()).onError(any(Throwable.class));
verify(observer, times(1)).onCompleted();
}
@Test
public void testSkipOneElement() {
Observable<String> skip = Observable.just("one", "two", "three").lift(new OperatorSkip<String>(1));
@SuppressWarnings("unchecked")
Observer<String> observer = mock(Observer.class);
skip.subscribe(observer);
verify(observer, never()).onNext("one");
verify(observer, times(1)).onNext("two");
verify(observer, times(1)).onNext("three");
verify(observer, never()).onError(any(Throwable.class));
verify(observer, times(1)).onCompleted();
}
@Test
public void testSkipTwoElements() {
Observable<String> skip = Observable.just("one", "two", "three").lift(new OperatorSkip<String>(2));
@SuppressWarnings("unchecked")
Observer<String> observer = mock(Observer.class);
skip.subscribe(observer);
verify(observer, never()).onNext("one");
verify(observer, never()).onNext("two");
verify(observer, times(1)).onNext("three");
verify(observer, never()).onError(any(Throwable.class));
verify(observer, times(1)).onCompleted();
}
@Test
public void testSkipEmptyStream() {
Observable<String> w = Observable.empty();
Observable<String> skip = w.lift(new OperatorSkip<String>(1));
@SuppressWarnings("unchecked")
Observer<String> observer = mock(Observer.class);
skip.subscribe(observer);
verify(observer, never()).onNext(any(String.class));
verify(observer, never()).onError(any(Throwable.class));
verify(observer, times(1)).onCompleted();
}
@Test
public void testSkipMultipleObservers() {
Observable<String> skip = Observable.just("one", "two", "three").lift(new OperatorSkip<String>(2));
@SuppressWarnings("unchecked")
Observer<String> observer1 = mock(Observer.class);
skip.subscribe(observer1);
@SuppressWarnings("unchecked")
Observer<String> observer2 = mock(Observer.class);
skip.subscribe(observer2);
verify(observer1, times(1)).onNext(any(String.class));
verify(observer1, never()).onError(any(Throwable.class));
verify(observer1, times(1)).onCompleted();
verify(observer2, times(1)).onNext(any(String.class));
verify(observer2, never()).onError(any(Throwable.class));
verify(observer2, times(1)).onCompleted();
}
@Test
public void testSkipError() {
Exception e = new Exception();
Observable<String> ok = Observable.just("one");
Observable<String> error = Observable.error(e);
Observable<String> skip = Observable.concat(ok, error).lift(new OperatorSkip<String>(100));
@SuppressWarnings("unchecked")
Observer<String> observer = mock(Observer.class);
skip.subscribe(observer);
verify(observer, never()).onNext(any(String.class));
verify(observer, times(1)).onError(e);
verify(observer, never()).onCompleted();
}
}