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/**

* Copyright 2013 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 java.util.ArrayList;

import org.junit.Test;

import rx.util.functions.Func2;

/**

* Test super/extends of generics.

*

* See https://github.com/Netflix/RxJava/pull/331

*/

public class CovarianceTest {

/**

* This won't compile if super/extends isn't done correctly on generics

*/

@Test

public void testCovarianceOfFrom() {

Observable.<Movie> from(new HorrorMovie());

Observable.<Movie> from(new ArrayList<HorrorMovie>());

// Observable.<HorrorMovie>from(new Movie()); // may not compile

}

@Test

public void testSortedList() {

Func2<Media, Media, Integer> SORT_FUNCTION = new Func2<Media, Media, Integer>() {

@Override

public Integer call(Media t1, Media t2) {

return 1;

}

};

// this one would work without the covariance generics

Observable<Media> o = Observable.from(new Movie(), new TVSeason(), new Album());

o.toSortedList(SORT_FUNCTION);

// this one would NOT work without the covariance generics

Observable<Movie> o2 = Observable.from(new Movie(), new ActionMovie(), new HorrorMovie());

o2.toSortedList(SORT_FUNCTION);

}

/*

* Most tests are moved into their applicable classes such as [Operator]Tests.java

*/

static class Media {

}

static class Movie extends Media {

}

static class HorrorMovie extends Movie {

}

static class ActionMovie extends Movie {

}

static class Album extends Media {

}

static class TVSeason extends Media {

}

static class Rating {

}

static class CoolRating extends Rating {

}

static class Result {

}

static class ExtendedResult extends Result {

}

}