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/**
* 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;
import static org.junit.Assert.assertEquals;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
import rx.CovarianceTest.HorrorMovie;
import rx.CovarianceTest.Media;
import rx.CovarianceTest.Movie;
import rx.Observable.OnSubscribe;
public class ConcatTests {
@Test
public void testConcatSimple() {
Observable<String> o1 = Observable.from("one", "two");
Observable<String> o2 = Observable.from("three", "four");
List<String> values = Observable.concat(o1, o2).toList().toBlocking().single();
assertEquals("one", values.get(0));
assertEquals("two", values.get(1));
assertEquals("three", values.get(2));
assertEquals("four", values.get(3));
}
@Test
public void testConcatWithObservableOfObservable() {
Observable<String> o1 = Observable.from("one", "two");
Observable<String> o2 = Observable.from("three", "four");
Observable<String> o3 = Observable.from("five", "six");
Observable<Observable<String>> os = Observable.from(o1, o2, o3);
List<String> values = Observable.concat(os).toList().toBlocking().single();
assertEquals("one", values.get(0));
assertEquals("two", values.get(1));
assertEquals("three", values.get(2));
assertEquals("four", values.get(3));
assertEquals("five", values.get(4));
assertEquals("six", values.get(5));
}
@Test
public void testConcatWithIterableOfObservable() {
Observable<String> o1 = Observable.from("one", "two");
Observable<String> o2 = Observable.from("three", "four");
Observable<String> o3 = Observable.from("five", "six");
@SuppressWarnings("unchecked")
Iterable<Observable<String>> is = Arrays.asList(o1, o2, o3);
List<String> values = Observable.concat(Observable.from(is)).toList().toBlocking().single();
assertEquals("one", values.get(0));
assertEquals("two", values.get(1));
assertEquals("three", values.get(2));
assertEquals("four", values.get(3));
assertEquals("five", values.get(4));
assertEquals("six", values.get(5));
}
@Test
public void testConcatCovariance() {
HorrorMovie horrorMovie1 = new HorrorMovie();
Movie movie = new Movie();
Media media = new Media();
HorrorMovie horrorMovie2 = new HorrorMovie();
Observable<Media> o1 = Observable.<Media> from(horrorMovie1, movie);
Observable<Media> o2 = Observable.from(media, horrorMovie2);
Observable<Observable<Media>> os = Observable.from(o1, o2);
List<Media> values = Observable.concat(os).toList().toBlocking().single();
assertEquals(horrorMovie1, values.get(0));
assertEquals(movie, values.get(1));
assertEquals(media, values.get(2));
assertEquals(horrorMovie2, values.get(3));
assertEquals(4, values.size());
}
@Test
public void testConcatCovariance2() {
HorrorMovie horrorMovie1 = new HorrorMovie();
Movie movie = new Movie();
Media media1 = new Media();
Media media2 = new Media();
HorrorMovie horrorMovie2 = new HorrorMovie();
Observable<Media> o1 = Observable.from(horrorMovie1, movie, media1);
Observable<Media> o2 = Observable.from(media2, horrorMovie2);
Observable<Observable<Media>> os = Observable.from(o1, o2);
List<Media> values = Observable.concat(os).toList().toBlocking().single();
assertEquals(horrorMovie1, values.get(0));
assertEquals(movie, values.get(1));
assertEquals(media1, values.get(2));
assertEquals(media2, values.get(3));
assertEquals(horrorMovie2, values.get(4));
assertEquals(5, values.size());
}
@Test
public void testConcatCovariance3() {
HorrorMovie horrorMovie1 = new HorrorMovie();
Movie movie = new Movie();
Media media = new Media();
HorrorMovie horrorMovie2 = new HorrorMovie();
Observable<Movie> o1 = Observable.from(horrorMovie1, movie);
Observable<Media> o2 = Observable.from(media, horrorMovie2);
List<Media> values = Observable.concat(o1, o2).toList().toBlocking().single();
assertEquals(horrorMovie1, values.get(0));
assertEquals(movie, values.get(1));
assertEquals(media, values.get(2));
assertEquals(horrorMovie2, values.get(3));
assertEquals(4, values.size());
}
@Test
public void testConcatCovariance4() {
final HorrorMovie horrorMovie1 = new HorrorMovie();
final Movie movie = new Movie();
Media media = new Media();
HorrorMovie horrorMovie2 = new HorrorMovie();
Observable<Movie> o1 = Observable.create(new OnSubscribe<Movie>() {
@Override
public void call(Subscriber<? super Movie> o) {
o.onNext(horrorMovie1);
o.onNext(movie);
// o.onNext(new Media()); // correctly doesn't compile
o.onCompleted();
}
});
Observable<Media> o2 = Observable.from(media, horrorMovie2);
List<Media> values = Observable.concat(o1, o2).toList().toBlocking().single();
assertEquals(horrorMovie1, values.get(0));
assertEquals(movie, values.get(1));
assertEquals(media, values.get(2));
assertEquals(horrorMovie2, values.get(3));
assertEquals(4, values.size());
}
}