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3248 lines (2610 loc) · 86.1 KB
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/**
* 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.maybe;
import static org.junit.Assert.*;
import java.io.IOException;
import java.lang.management.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import org.reactivestreams.Publisher;
import io.reactivex.*;
import io.reactivex.Observable;
import io.reactivex.disposables.*;
import io.reactivex.exceptions.*;
import io.reactivex.functions.*;
import io.reactivex.internal.functions.Functions;
import io.reactivex.internal.fuseable.QueueFuseable;
import io.reactivex.internal.operators.flowable.FlowableZipTest.ArgsToString;
import io.reactivex.internal.operators.maybe.*;
import io.reactivex.observers.TestObserver;
import io.reactivex.plugins.RxJavaPlugins;
import io.reactivex.processors.PublishProcessor;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subjects.PublishSubject;
import io.reactivex.subscribers.*;
public class MaybeTest {
@Test
public void fromFlowableEmpty() {
Flowable.empty()
.singleElement()
.test()
.assertResult();
}
@Test
public void fromFlowableJust() {
Flowable.just(1)
.singleElement()
.test()
.assertResult(1);
}
@Test
public void fromFlowableError() {
Flowable.error(new TestException())
.singleElement()
.test()
.assertFailure(TestException.class);
}
@Test
public void fromFlowableValueAndError() {
Flowable.just(1).concatWith(Flowable.<Integer>error(new TestException()))
.singleElement()
.test()
.assertFailure(TestException.class);
}
@Test
public void fromFlowableMany() {
Flowable.range(1, 2)
.singleElement()
.test()
.assertFailure(IllegalArgumentException.class);
}
@Test
public void fromFlowableDisposeComposesThrough() {
PublishProcessor<Integer> pp = PublishProcessor.create();
TestObserver<Integer> to = pp.singleElement().test();
assertTrue(pp.hasSubscribers());
to.cancel();
assertFalse(pp.hasSubscribers());
}
@Test
public void fromObservableEmpty() {
Observable.empty()
.singleElement()
.test()
.assertResult();
}
@Test
public void fromObservableJust() {
Observable.just(1)
.singleElement()
.test()
.assertResult(1);
}
@Test
public void fromObservableError() {
Observable.error(new TestException())
.singleElement()
.test()
.assertFailure(TestException.class);
}
@Test
public void fromObservableValueAndError() {
Flowable.just(1).concatWith(Flowable.<Integer>error(new TestException()))
.singleElement()
.test()
.assertFailure(TestException.class);
}
@Test
public void fromObservableMany() {
Observable.range(1, 2)
.singleElement()
.test()
.assertFailure(IllegalArgumentException.class);
}
@Test
public void fromObservableDisposeComposesThrough() {
PublishSubject<Integer> ps = PublishSubject.create();
TestObserver<Integer> to = ps.singleElement().test(false);
assertTrue(ps.hasObservers());
to.cancel();
assertFalse(ps.hasObservers());
}
@Test
public void fromObservableDisposeComposesThroughImmediatelyCancelled() {
PublishSubject<Integer> ps = PublishSubject.create();
ps.singleElement().test(true);
assertFalse(ps.hasObservers());
}
@Test
public void just() {
Maybe.just(1)
.test()
.assertResult(1);
}
@Test(expected = NullPointerException.class)
public void justNull() {
Maybe.just(null);
}
@Test
public void empty() {
Maybe.empty()
.test()
.assertResult();
}
@Test
public void never() {
Maybe.never()
.test()
.assertSubscribed()
.assertNoValues()
.assertNoErrors()
.assertNotComplete();
}
@Test(expected = NullPointerException.class)
public void errorNull() {
Maybe.error((Throwable)null);
}
@Test(expected = NullPointerException.class)
public void errorCallableNull() {
Maybe.error((Callable<Throwable>)null);
}
@Test
public void error() {
Maybe.error(new TestException())
.test()
.assertFailure(TestException.class);
}
@Test
public void errorCallable() {
Maybe.error(Functions.justCallable(new TestException()))
.test()
.assertFailure(TestException.class);
}
@Test
public void errorCallableReturnsNull() {
Maybe.error(Functions.justCallable((Throwable)null))
.test()
.assertFailure(NullPointerException.class);
}
@Test
public void wrapCustom() {
Maybe.wrap(new MaybeSource<Integer>() {
@Override
public void subscribe(MaybeObserver<? super Integer> observer) {
observer.onSubscribe(Disposables.empty());
observer.onSuccess(1);
}
})
.test()
.assertResult(1);
}
@Test
public void wrapMaybe() {
assertSame(Maybe.empty(), Maybe.wrap(Maybe.empty()));
}
@Test(expected = NullPointerException.class)
public void wrapNull() {
Maybe.wrap(null);
}
@Test
public void emptySingleton() {
assertSame(Maybe.empty(), Maybe.empty());
}
@Test
public void neverSingleton() {
assertSame(Maybe.never(), Maybe.never());
}
@Test(expected = NullPointerException.class)
public void liftNull() {
Maybe.just(1).lift(null);
}
@Test
public void liftJust() {
Maybe.just(1).lift(new MaybeOperator<Integer, Integer>() {
@Override
public MaybeObserver<? super Integer> apply(MaybeObserver<? super Integer> t) throws Exception {
return t;
}
})
.test()
.assertResult(1);
}
@Test
public void liftThrows() {
Maybe.just(1).lift(new MaybeOperator<Integer, Integer>() {
@Override
public MaybeObserver<? super Integer> apply(MaybeObserver<? super Integer> t) throws Exception {
throw new TestException();
}
})
.test()
.assertFailure(TestException.class);
}
@Test(expected = NullPointerException.class)
public void deferNull() {
Maybe.defer(null);
}
@Test
public void deferThrows() {
Maybe.defer(new Callable<Maybe<Integer>>() {
@Override
public Maybe<Integer> call() throws Exception {
throw new TestException();
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void deferReturnsNull() {
Maybe.defer(new Callable<Maybe<Integer>>() {
@Override
public Maybe<Integer> call() throws Exception {
return null;
}
})
.test()
.assertFailure(NullPointerException.class);
}
@Test
public void defer() {
Maybe<Integer> source = Maybe.defer(new Callable<Maybe<Integer>>() {
int count;
@Override
public Maybe<Integer> call() throws Exception {
return Maybe.just(count++);
}
});
for (int i = 0; i < 128; i++) {
source.test().assertResult(i);
}
}
@Test
public void flowableMaybeFlowable() {
Flowable.just(1).singleElement().toFlowable().test().assertResult(1);
}
@Test
public void obervableMaybeobervable() {
Observable.just(1).singleElement().toObservable().test().assertResult(1);
}
@Test
public void singleMaybeSingle() {
Single.just(1).toMaybe().toSingle().test().assertResult(1);
}
@Test
public void completableMaybeCompletable() {
Completable.complete().toMaybe().ignoreElement().test().assertResult();
}
@Test
public void unsafeCreate() {
Maybe.unsafeCreate(new MaybeSource<Integer>() {
@Override
public void subscribe(MaybeObserver<? super Integer> observer) {
observer.onSubscribe(Disposables.empty());
observer.onSuccess(1);
}
})
.test()
.assertResult(1);
}
@Test(expected = NullPointerException.class)
public void unsafeCreateNull() {
Maybe.unsafeCreate(null);
}
@Test
public void to() {
Maybe.just(1).to(new Function<Maybe<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Maybe<Integer> v) throws Exception {
return v.toFlowable();
}
})
.test()
.assertResult(1);
}
@Test
public void as() {
Maybe.just(1).as(new MaybeConverter<Integer, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Maybe<Integer> v) {
return v.toFlowable();
}
})
.test()
.assertResult(1);
}
@Test(expected = NullPointerException.class)
public void toNull() {
Maybe.just(1).to(null);
}
@Test(expected = NullPointerException.class)
public void asNull() {
Maybe.just(1).as(null);
}
@Test
public void compose() {
Maybe.just(1).compose(new MaybeTransformer<Integer, Integer>() {
@Override
public MaybeSource<Integer> apply(Maybe<Integer> m) {
return m.map(new Function<Integer, Integer>() {
@Override
public Integer apply(Integer w) throws Exception {
return w + 1;
}
});
}
})
.test()
.assertResult(2);
}
@Test(expected = NullPointerException.class)
public void composeNull() {
Maybe.just(1).compose(null);
}
@Test(expected = NullPointerException.class)
public void mapNull() {
Maybe.just(1).map(null);
}
@Test
public void mapReturnNull() {
Maybe.just(1).map(new Function<Integer, Object>() {
@Override
public Object apply(Integer v) throws Exception {
return null;
}
}).test().assertFailure(NullPointerException.class);
}
@Test
public void mapThrows() {
Maybe.just(1).map(new Function<Integer, Object>() {
@Override
public Object apply(Integer v) throws Exception {
throw new IOException();
}
}).test().assertFailure(IOException.class);
}
@Test
public void map() {
Maybe.just(1).map(new Function<Integer, String>() {
@Override
public String apply(Integer v) throws Exception {
return v.toString();
}
}).test().assertResult("1");
}
@Test(expected = NullPointerException.class)
public void filterNull() {
Maybe.just(1).filter(null);
}
@Test
public void filterThrows() {
Maybe.just(1).filter(new Predicate<Integer>() {
@Override
public boolean test(Integer v) throws Exception {
throw new IOException();
}
}).test().assertFailure(IOException.class);
}
@Test
public void filterTrue() {
Maybe.just(1).filter(new Predicate<Integer>() {
@Override
public boolean test(Integer v) throws Exception {
return v == 1;
}
}).test().assertResult(1);
}
@Test
public void filterFalse() {
Maybe.just(2).filter(new Predicate<Integer>() {
@Override
public boolean test(Integer v) throws Exception {
return v == 1;
}
}).test().assertResult();
}
@Test
public void filterEmpty() {
Maybe.<Integer>empty().filter(new Predicate<Integer>() {
@Override
public boolean test(Integer v) throws Exception {
return v == 1;
}
}).test().assertResult();
}
@Test(expected = NullPointerException.class)
public void singleFilterNull() {
Single.just(1).filter(null);
}
@Test
public void singleFilterThrows() {
Single.just(1).filter(new Predicate<Integer>() {
@Override
public boolean test(Integer v) throws Exception {
throw new IOException();
}
}).test().assertFailure(IOException.class);
}
@Test
public void singleFilterTrue() {
Single.just(1).filter(new Predicate<Integer>() {
@Override
public boolean test(Integer v) throws Exception {
return v == 1;
}
}).test().assertResult(1);
}
@Test
public void singleFilterFalse() {
Single.just(2).filter(new Predicate<Integer>() {
@Override
public boolean test(Integer v) throws Exception {
return v == 1;
}
}).test().assertResult();
}
@Test
public void cast() {
TestObserver<Number> to = Maybe.just(1).cast(Number.class).test();
// don'n inline this due to the generic type
to.assertResult((Number)1);
}
@Test(expected = NullPointerException.class)
public void observeOnNull() {
Maybe.just(1).observeOn(null);
}
@Test(expected = NullPointerException.class)
public void subscribeOnNull() {
Maybe.just(1).observeOn(null);
}
@Test
public void observeOnSuccess() {
String main = Thread.currentThread().getName();
Maybe.just(1)
.observeOn(Schedulers.single())
.map(new Function<Integer, String>() {
@Override
public String apply(Integer v) throws Exception {
return v + ": " + Thread.currentThread().getName();
}
})
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertOf(TestHelper.observerSingleNot("1: " + main))
;
}
@Test
public void observeOnError() {
Maybe.error(new TestException())
.observeOn(Schedulers.single())
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertFailure(TestException.class)
;
}
@Test
public void observeOnComplete() {
Maybe.empty()
.observeOn(Schedulers.single())
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertResult()
;
}
@Test
public void observeOnDispose2() {
TestHelper.checkDisposed(Maybe.empty().observeOn(Schedulers.single()));
}
@Test
public void observeOnDoubleSubscribe() {
TestHelper.checkDoubleOnSubscribeMaybe(new Function<Maybe<Object>, MaybeSource<Object>>() {
@Override
public MaybeSource<Object> apply(Maybe<Object> m) throws Exception {
return m.observeOn(Schedulers.single());
}
});
}
@Test
public void subscribeOnSuccess() {
String main = Thread.currentThread().getName();
Maybe.fromCallable(new Callable<String>() {
@Override
public String call() throws Exception {
return Thread.currentThread().getName();
}
})
.subscribeOn(Schedulers.single())
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertOf(TestHelper.observerSingleNot(main))
;
}
@Test
public void observeOnErrorThread() {
String main = Thread.currentThread().getName();
final String[] name = { null };
Maybe.error(new TestException()).observeOn(Schedulers.single())
.doOnError(new Consumer<Throwable>() {
@Override
public void accept(Throwable e) throws Exception {
name[0] = Thread.currentThread().getName();
}
})
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertFailure(TestException.class)
;
assertNotEquals(main, name[0]);
}
@Test
public void observeOnCompleteThread() {
String main = Thread.currentThread().getName();
final String[] name = { null };
Maybe.empty().observeOn(Schedulers.single())
.doOnComplete(new Action() {
@Override
public void run() throws Exception {
name[0] = Thread.currentThread().getName();
}
})
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertResult()
;
assertNotEquals(main, name[0]);
}
@Test
public void subscribeOnError() {
Maybe.error(new TestException())
.subscribeOn(Schedulers.single())
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertFailure(TestException.class)
;
}
@Test
public void subscribeOnComplete() {
Maybe.empty()
.subscribeOn(Schedulers.single())
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertResult()
;
}
@Test
public void fromAction() {
final int[] call = { 0 };
Maybe.fromAction(new Action() {
@Override
public void run() throws Exception {
call[0]++;
}
})
.test()
.assertResult();
assertEquals(1, call[0]);
}
@Test
public void fromActionThrows() {
Maybe.fromAction(new Action() {
@Override
public void run() throws Exception {
throw new TestException();
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void fromRunnable() {
final int[] call = { 0 };
Maybe.fromRunnable(new Runnable() {
@Override
public void run() {
call[0]++;
}
})
.test()
.assertResult();
assertEquals(1, call[0]);
}
@Test
public void fromRunnableThrows() {
Maybe.fromRunnable(new Runnable() {
@Override
public void run() {
throw new TestException();
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void fromCallableThrows() {
Maybe.fromCallable(new Callable<Object>() {
@Override
public Object call() throws Exception {
throw new TestException();
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void doOnSuccess() {
final Integer[] value = { null };
Maybe.just(1).doOnSuccess(new Consumer<Integer>() {
@Override
public void accept(Integer v) throws Exception {
value[0] = v;
}
})
.test()
.assertResult(1);
assertEquals(1, value[0].intValue());
}
@Test
public void doOnSuccessEmpty() {
final Integer[] value = { null };
Maybe.<Integer>empty().doOnSuccess(new Consumer<Integer>() {
@Override
public void accept(Integer v) throws Exception {
value[0] = v;
}
})
.test()
.assertResult();
assertNull(value[0]);
}
@Test
public void doOnSuccessThrows() {
Maybe.just(1).doOnSuccess(new Consumer<Integer>() {
@Override
public void accept(Integer v) throws Exception {
throw new TestException();
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void doOnSubscribe() {
final Disposable[] value = { null };
Maybe.just(1).doOnSubscribe(new Consumer<Disposable>() {
@Override
public void accept(Disposable v) throws Exception {
value[0] = v;
}
})
.test()
.assertResult(1);
assertNotNull(value[0]);
}
@Test
public void doOnSubscribeThrows() {
Maybe.just(1).doOnSubscribe(new Consumer<Disposable>() {
@Override
public void accept(Disposable v) throws Exception {
throw new TestException();
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void doOnCompleteThrows() {
Maybe.empty().doOnComplete(new Action() {
@Override
public void run() throws Exception {
throw new TestException();
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void doOnDispose() {
final int[] call = { 0 };
Maybe.just(1).doOnDispose(new Action() {
@Override
public void run() throws Exception {
call[0]++;
}
})
.test(true)
.assertSubscribed()
.assertNoValues()
.assertNoErrors()
.assertNotComplete();
assertEquals(1, call[0]);
}
@Test
public void doOnDisposeThrows() {
List<Throwable> list = TestHelper.trackPluginErrors();
try {
PublishProcessor<Integer> pp = PublishProcessor.create();
TestObserver<Integer> to = pp.singleElement().doOnDispose(new Action() {
@Override
public void run() throws Exception {
throw new TestException();
}
})
.test();
assertTrue(pp.hasSubscribers());
to.cancel();
assertFalse(pp.hasSubscribers());
to.assertSubscribed()
.assertNoValues()
.assertNoErrors()
.assertNotComplete();
TestHelper.assertUndeliverable(list, 0, TestException.class);
} finally {
RxJavaPlugins.reset();
}
}
@Test
public void observeOnDispose() throws Exception {
final TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
final CountDownLatch cdl = new CountDownLatch(1);
Maybe.just(1)
.observeOn(Schedulers.single())
.doOnSuccess(new Consumer<Integer>() {
@Override
public void accept(Integer v) throws Exception {
if (!cdl.await(5, TimeUnit.SECONDS)) {
throw new TimeoutException();
}
}
})
.toFlowable().subscribe(ts);
Thread.sleep(250);
ts.cancel();
ts.awaitDone(5, TimeUnit.SECONDS)
.assertFailure(InterruptedException.class);
}
@Test
public void doAfterTerminateSuccess() {
final int[] call = { 0 };
Maybe.just(1)
.doOnSuccess(new Consumer<Integer>() {
@Override
public void accept(Integer v) throws Exception {
call[0]++;
}
})
.doAfterTerminate(new Action() {
@Override
public void run() throws Exception {
if (call[0] == 1) {
call[0] = -1;
}
}
})
.test()
.assertResult(1);
assertEquals(-1, call[0]);
}
@Test
public void doAfterTerminateError() {
final int[] call = { 0 };
Maybe.error(new TestException())
.doOnError(new Consumer<Object>() {
@Override
public void accept(Object v) throws Exception {
call[0]++;
}
})
.doAfterTerminate(new Action() {
@Override
public void run() throws Exception {
if (call[0] == 1) {
call[0] = -1;
}
}
})
.test()
.assertFailure(TestException.class);
assertEquals(-1, call[0]);
}
@Test
public void doAfterTerminateComplete() {
final int[] call = { 0 };
Maybe.empty()
.doOnComplete(new Action() {
@Override
public void run() throws Exception {
call[0]++;
}
})
.doAfterTerminate(new Action() {
@Override
public void run() throws Exception {
if (call[0] == 1) {
call[0] = -1;
}
}
})
.test()
.assertResult();
assertEquals(-1, call[0]);
}
@Test