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CombineLatestTests.java
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67 lines (56 loc) · 2.8 KB
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/**
* Copyright 2015 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 io.reactivex;
import static io.reactivex.Observable.combineLatest;
import static org.junit.Assert.assertNull;
import java.util.function.*;
import org.junit.*;
import io.reactivex.CovarianceTest.*;
import io.reactivex.subjects.BehaviorSubject;
public class CombineLatestTests {
/**
* This won't compile if super/extends isn't done correctly on generics
*/
@Test
public void testCovarianceOfCombineLatest() {
Observable<HorrorMovie> horrors = Observable.just(new HorrorMovie());
Observable<CoolRating> ratings = Observable.just(new CoolRating());
Observable.<Movie, CoolRating, Result> combineLatest(horrors, ratings, combine).toBlocking().forEach(action);
Observable.<Movie, CoolRating, Result> combineLatest(horrors, ratings, combine).toBlocking().forEach(action);
Observable.<Media, Rating, ExtendedResult> combineLatest(horrors, ratings, combine).toBlocking().forEach(extendedAction);
Observable.<Media, Rating, Result> combineLatest(horrors, ratings, combine).toBlocking().forEach(action);
Observable.<Media, Rating, ExtendedResult> combineLatest(horrors, ratings, combine).toBlocking().forEach(action);
Observable.<Movie, CoolRating, Result> combineLatest(horrors, ratings, combine);
}
BiFunction<Media, Rating, ExtendedResult> combine = (m, r) -> new ExtendedResult();
Consumer<Result> action = t1 -> System.out.println("Result: " + t1);
Consumer<ExtendedResult> extendedAction = t1 -> System.out.println("Result: " + t1);
@Ignore
@Test
public void testNullEmitting() throws Exception {
// FIXME this is no longer allowed
Observable<Boolean> nullObservable = BehaviorSubject.createDefault((Boolean) null);
Observable<Boolean> nonNullObservable = BehaviorSubject.createDefault(true);
Observable<Boolean> combined =
combineLatest(nullObservable, nonNullObservable, new BiFunction<Boolean, Boolean, Boolean>() {
@Override
public Boolean apply(Boolean bool1, Boolean bool2) {
return bool1 == null ? null : bool2;
}
});
combined.subscribe(aBoolean -> assertNull(aBoolean));
}
}