/**
* Copyright (c) 2016-present, RxJava Contributors.
*
* 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.internal.operators.observable;
import static org.junit.Assert.*;
import java.util.*;
import java.util.concurrent.*;
import org.junit.Test;
import io.reactivex.*;
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.disposables.*;
import io.reactivex.exceptions.*;
import io.reactivex.functions.Function;
import io.reactivex.internal.functions.Functions;
import io.reactivex.observers.TestObserver;
import io.reactivex.plugins.RxJavaPlugins;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subjects.PublishSubject;
public class ObservableFlatMapMaybeTest {
@Test
public void normal() {
Observable.range(1, 10)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.just(v);
}
})
.test()
.assertResult(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
}
@Test
public void normalEmpty() {
Observable.range(1, 10)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.empty();
}
})
.test()
.assertResult();
}
@Test
public void normalDelayError() {
Observable.range(1, 10)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.just(v);
}
}, true)
.test()
.assertResult(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
}
@Test
public void normalAsync() {
Observable.range(1, 10)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.just(v).subscribeOn(Schedulers.computation());
}
})
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertSubscribed()
.assertValueSet(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))
.assertNoErrors()
.assertComplete();
}
@Test
public void mapperThrowsObservable() {
PublishSubject<Integer> ps = PublishSubject.create();
TestObserver<Integer> to = ps
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
throw new TestException();
}
})
.test();
assertTrue(ps.hasObservers());
ps.onNext(1);
to.assertFailure(TestException.class);
assertFalse(ps.hasObservers());
}
@Test
public void mapperReturnsNullObservable() {
PublishSubject<Integer> ps = PublishSubject.create();
TestObserver<Integer> to = ps
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return null;
}
})
.test();
assertTrue(ps.hasObservers());
ps.onNext(1);
to.assertFailure(NullPointerException.class);
assertFalse(ps.hasObservers());
}
@Test
public void normalDelayErrorAll() {
TestObserver<Integer> to = Observable.range(1, 10).concatWith(Observable.<Integer>error(new TestException()))
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.error(new TestException());
}
}, true)
.test()
.assertFailure(CompositeException.class);
List<Throwable> errors = TestHelper.compositeList(to.errors().get(0));
for (int i = 0; i < 11; i++) {
TestHelper.assertError(errors, i, TestException.class);
}
}
@Test
public void takeAsync() {
Observable.range(1, 10)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.just(v).subscribeOn(Schedulers.computation());
}
})
.take(2)
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertSubscribed()
.assertValueCount(2)
.assertValueSet(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))
.assertNoErrors()
.assertComplete();
}
@Test
public void take() {
Observable.range(1, 10)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.just(v);
}
})
.take(2)
.test()
.assertResult(1, 2);
}
@Test
public void middleError() {
Observable.fromArray(new String[]{"1","a","2"}).flatMapMaybe(new Function<String, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(final String s) throws NumberFormatException {
//return Single.just(Integer.valueOf(s)); //This works
return Maybe.fromCallable(new Callable<Integer>() {
@Override
public Integer call() throws NumberFormatException {
return Integer.valueOf(s);
}
});
}
})
.test()
.assertFailure(NumberFormatException.class, 1);
}
@Test
public void asyncFlatten() {
Observable.range(1, 1000)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.just(1).subscribeOn(Schedulers.computation());
}
})
.take(500)
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertSubscribed()
.assertValueCount(500)
.assertNoErrors()
.assertComplete();
}
@Test
public void asyncFlattenNone() {
Observable.range(1, 1000)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.<Integer>empty().subscribeOn(Schedulers.computation());
}
})
.take(500)
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertResult();
}
@Test
public void successError() {
final PublishSubject<Integer> ps = PublishSubject.create();
TestObserver<Integer> to = Observable.range(1, 2)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
if (v == 2) {
return ps.singleElement();
}
return Maybe.error(new TestException());
}
}, true)
.test();
ps.onNext(1);
ps.onComplete();
to
.assertFailure(TestException.class, 1);
}
@Test
public void completeError() {
final PublishSubject<Integer> ps = PublishSubject.create();
TestObserver<Integer> to = Observable.range(1, 2)
.flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
if (v == 2) {
return ps.singleElement();
}
return Maybe.error(new TestException());
}
}, true)
.test();
ps.onComplete();
to
.assertFailure(TestException.class);
}
@Test
public void disposed() {
TestHelper.checkDisposed(PublishSubject.<Integer>create().flatMapMaybe(new Function<Integer, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(Integer v) throws Exception {
return Maybe.<Integer>empty();
}
}));
}
@Test
public void innerSuccessCompletesAfterMain() {
PublishSubject<Integer> ps = PublishSubject.create();
TestObserver<Integer> to = Observable.just(1).flatMapMaybe(Functions.justFunction(ps.singleElement()))
.test();
ps.onNext(2);
ps.onComplete();
to
.assertResult(2);
}
@Test
public void doubleOnSubscribe() {
TestHelper.checkDoubleOnSubscribeObservable(new Function<Observable<Object>, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Observable<Object> f) throws Exception {
return f.flatMapMaybe(Functions.justFunction(Maybe.just(2)));
}
});
}
@Test
public void badSource() {
List<Throwable> errors = TestHelper.trackPluginErrors();
try {
new Observable<Integer>() {
@Override
protected void subscribeActual(Observer<? super Integer> observer) {
observer.onSubscribe(Disposables.empty());
observer.onError(new TestException("First"));
observer.onError(new TestException("Second"));
}
}
.flatMapMaybe(Functions.justFunction(Maybe.just(2)))
.test()
.assertFailureAndMessage(TestException.class, "First");
TestHelper.assertUndeliverable(errors, 0, TestException.class, "Second");
} finally {
RxJavaPlugins.reset();
}
}
@Test
public void badInnerSource() {
List<Throwable> errors = TestHelper.trackPluginErrors();
try {
Observable.just(1)
.flatMapMaybe(Functions.justFunction(new Maybe<Integer>() {
@Override
protected void subscribeActual(MaybeObserver<? super Integer> observer) {
observer.onSubscribe(Disposables.empty());
observer.onError(new TestException("First"));
observer.onError(new TestException("Second"));
}
}))
.test()
.assertFailureAndMessage(TestException.class, "First");
TestHelper.assertUndeliverable(errors, 0, TestException.class, "Second");
} finally {
RxJavaPlugins.reset();
}
}
@Test
public void emissionQueueTrigger() {
final PublishSubject<Integer> ps1 = PublishSubject.create();
final PublishSubject<Integer> ps2 = PublishSubject.create();
TestObserver<Integer> to = new TestObserver<Integer>() {
@Override
public void onNext(Integer t) {
super.onNext(t);
if (t == 1) {
ps2.onNext(2);
ps2.onComplete();
}
}
};
Observable.just(ps1, ps2)
.flatMapMaybe(new Function<PublishSubject<Integer>, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(PublishSubject<Integer> v) throws Exception {
return v.singleElement();
}
})
.subscribe(to);
ps1.onNext(1);
ps1.onComplete();
to.assertResult(1, 2);
}
@Test
public void emissionQueueTrigger2() {
final PublishSubject<Integer> ps1 = PublishSubject.create();
final PublishSubject<Integer> ps2 = PublishSubject.create();
final PublishSubject<Integer> ps3 = PublishSubject.create();
TestObserver<Integer> to = new TestObserver<Integer>() {
@Override
public void onNext(Integer t) {
super.onNext(t);
if (t == 1) {
ps2.onNext(2);
ps2.onComplete();
}
}
};
Observable.just(ps1, ps2, ps3)
.flatMapMaybe(new Function<PublishSubject<Integer>, MaybeSource<Integer>>() {
@Override
public MaybeSource<Integer> apply(PublishSubject<Integer> v) throws Exception {
return v.singleElement();
}
})
.subscribe(to);
ps1.onNext(1);
ps1.onComplete();
ps3.onComplete();
to.assertResult(1, 2);
}
@Test
public void disposeInner() {
final TestObserver<Object> to = new TestObserver<Object>();
Observable.just(1).flatMapMaybe(new Function<Integer, MaybeSource<Object>>() {
@Override
public MaybeSource<Object> apply(Integer v) throws Exception {
return new Maybe<Object>() {
@Override
protected void subscribeActual(MaybeObserver<? super Object> observer) {
observer.onSubscribe(Disposables.empty());
assertFalse(((Disposable)observer).isDisposed());
to.dispose();
assertTrue(((Disposable)observer).isDisposed());
}
};
}
})
.subscribe(to);
to
.assertEmpty();
}
}