/**
* 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.lang.reflect.Method;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import org.junit.*;
import io.reactivex.*;
import io.reactivex.Observable;
import io.reactivex.exceptions.*;
import io.reactivex.functions.*;
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.*;
public class ObservableConcatMapEagerTest {
@Test
public void normal() {
Observable.range(1, 5)
.concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer t) {
return Observable.range(t, 2);
}
})
.test()
.assertResult(1, 2, 2, 3, 3, 4, 4, 5, 5, 6);
}
@Test
@Ignore("Observable doesn't do backpressure")
public void normalBackpressured() {
// TestObserver<Integer> ts = Observable.range(1, 5)
// .concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
// @Override
// public ObservableSource<Integer> apply(Integer t) {
// return Observable.range(t, 2);
// }
// })
// .test(3);
//
// ts.assertValues(1, 2, 2);
//
// ts.request(1);
//
// ts.assertValues(1, 2, 2, 3);
//
// ts.request(1);
//
// ts.assertValues(1, 2, 2, 3, 3);
//
// ts.request(5);
//
// ts.assertResult(1, 2, 2, 3, 3, 4, 4, 5, 5, 6);
}
@Test
public void normalDelayBoundary() {
Observable.range(1, 5)
.concatMapEagerDelayError(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer t) {
return Observable.range(t, 2);
}
}, false)
.test()
.assertResult(1, 2, 2, 3, 3, 4, 4, 5, 5, 6);
}
@Test
@Ignore("Observable doesn't do backpressure")
public void normalDelayBoundaryBackpressured() {
// TestObserver<Integer> ts = Observable.range(1, 5)
// .concatMapEagerDelayError(new Function<Integer, ObservableSource<Integer>>() {
// @Override
// public ObservableSource<Integer> apply(Integer t) {
// return Observable.range(t, 2);
// }
// }, false)
// .test(3);
//
// ts.assertValues(1, 2, 2);
//
// ts.request(1);
//
// ts.assertValues(1, 2, 2, 3);
//
// ts.request(1);
//
// ts.assertValues(1, 2, 2, 3, 3);
//
// ts.request(5);
//
// ts.assertResult(1, 2, 2, 3, 3, 4, 4, 5, 5, 6);
}
@Test
public void normalDelayEnd() {
Observable.range(1, 5)
.concatMapEagerDelayError(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer t) {
return Observable.range(t, 2);
}
}, true)
.test()
.assertResult(1, 2, 2, 3, 3, 4, 4, 5, 5, 6);
}
@Test
@Ignore("Observable doesn't do backpressure")
public void normalDelayEndBackpressured() {
// TestObserver<Integer> ts = Observable.range(1, 5)
// .concatMapEagerDelayError(new Function<Integer, ObservableSource<Integer>>() {
// @Override
// public ObservableSource<Integer> apply(Integer t) {
// return Observable.range(t, 2);
// }
// }, true)
// .test(3);
//
// ts.assertValues(1, 2, 2);
//
// ts.request(1);
//
// ts.assertValues(1, 2, 2, 3);
//
// ts.request(1);
//
// ts.assertValues(1, 2, 2, 3, 3);
//
// ts.request(5);
//
// ts.assertResult(1, 2, 2, 3, 3, 4, 4, 5, 5, 6);
}
@Test
public void mainErrorsDelayBoundary() {
PublishSubject<Integer> main = PublishSubject.create();
final PublishSubject<Integer> inner = PublishSubject.create();
TestObserver<Integer> ts = main.concatMapEagerDelayError(
new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer t) {
return inner;
}
}, false).test();
main.onNext(1);
inner.onNext(2);
ts.assertValue(2);
main.onError(new TestException("Forced failure"));
ts.assertNoErrors();
inner.onNext(3);
inner.onComplete();
ts.assertFailureAndMessage(TestException.class, "Forced failure", 2, 3);
}
@Test
public void mainErrorsDelayEnd() {
PublishSubject<Integer> main = PublishSubject.create();
final PublishSubject<Integer> inner = PublishSubject.create();
TestObserver<Integer> ts = main.concatMapEagerDelayError(
new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer t) {
return inner;
}
}, true).test();
main.onNext(1);
main.onNext(2);
inner.onNext(2);
ts.assertValue(2);
main.onError(new TestException("Forced failure"));
ts.assertNoErrors();
inner.onNext(3);
inner.onComplete();
ts.assertFailureAndMessage(TestException.class, "Forced failure", 2, 3, 2, 3);
}
@Test
public void mainErrorsImmediate() {
PublishSubject<Integer> main = PublishSubject.create();
final PublishSubject<Integer> inner = PublishSubject.create();
TestObserver<Integer> ts = main.concatMapEager(
new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer t) {
return inner;
}
}).test();
main.onNext(1);
main.onNext(2);
inner.onNext(2);
ts.assertValue(2);
main.onError(new TestException("Forced failure"));
assertFalse("inner has subscribers?", inner.hasObservers());
inner.onNext(3);
inner.onComplete();
ts.assertFailureAndMessage(TestException.class, "Forced failure", 2);
}
@Test
public void longEager() {
Observable.range(1, 2 * Observable.bufferSize())
.concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) {
return Observable.just(1);
}
})
.test()
.assertValueCount(2 * Observable.bufferSize())
.assertNoErrors()
.assertComplete();
}
TestObserver<Object> ts;
Function<Integer, Observable<Integer>> toJust = new Function<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> apply(Integer t) {
return Observable.just(t);
}
};
Function<Integer, Observable<Integer>> toRange = new Function<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> apply(Integer t) {
return Observable.range(t, 2);
}
};
@Before
public void before() {
ts = new TestObserver<Object>();
}
@Test
public void testSimple() {
Observable.range(1, 100).concatMapEager(toJust).subscribe(ts);
ts.assertNoErrors();
ts.assertValueCount(100);
ts.assertComplete();
}
@Test
public void testSimple2() {
Observable.range(1, 100).concatMapEager(toRange).subscribe(ts);
ts.assertNoErrors();
ts.assertValueCount(200);
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testEagerness2() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.just(1).doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
Observable.concatArrayEager(source, source).subscribe(ts);
Assert.assertEquals(2, count.get());
ts.assertValueCount(count.get());
ts.assertNoErrors();
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testEagerness3() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.just(1).doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
Observable.concatArrayEager(source, source, source).subscribe(ts);
Assert.assertEquals(3, count.get());
ts.assertValueCount(count.get());
ts.assertNoErrors();
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testEagerness4() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.just(1).doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
Observable.concatArrayEager(source, source, source, source).subscribe(ts);
Assert.assertEquals(4, count.get());
ts.assertValueCount(count.get());
ts.assertNoErrors();
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testEagerness5() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.just(1).doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
Observable.concatArrayEager(source, source, source, source, source).subscribe(ts);
Assert.assertEquals(5, count.get());
ts.assertValueCount(count.get());
ts.assertNoErrors();
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testEagerness6() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.just(1).doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
Observable.concatArrayEager(source, source, source, source, source, source).subscribe(ts);
Assert.assertEquals(6, count.get());
ts.assertValueCount(count.get());
ts.assertNoErrors();
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testEagerness7() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.just(1).doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
Observable.concatArrayEager(source, source, source, source, source, source, source).subscribe(ts);
Assert.assertEquals(7, count.get());
ts.assertValueCount(count.get());
ts.assertNoErrors();
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testEagerness8() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.just(1).doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
Observable.concatArrayEager(source, source, source, source, source, source, source, source).subscribe(ts);
Assert.assertEquals(8, count.get());
ts.assertValueCount(count.get());
ts.assertNoErrors();
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testEagerness9() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.just(1).doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
Observable.concatArrayEager(source, source, source, source, source, source, source, source, source).subscribe(ts);
Assert.assertEquals(9, count.get());
ts.assertValueCount(count.get());
ts.assertNoErrors();
ts.assertComplete();
}
@Test
public void testMainError() {
Observable.<Integer>error(new TestException()).concatMapEager(toJust).subscribe(ts);
ts.assertNoValues();
ts.assertError(TestException.class);
ts.assertNotComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testInnerError() {
// TODO verify: concatMapEager subscribes first then consumes the sources is okay
PublishSubject<Integer> ps = PublishSubject.create();
Observable.concatArrayEager(Observable.just(1), ps)
.subscribe(ts);
ps.onError(new TestException());
ts.assertValue(1);
ts.assertError(TestException.class);
ts.assertNotComplete();
}
@SuppressWarnings("unchecked")
@Test
public void testInnerEmpty() {
Observable.concatArrayEager(Observable.empty(), Observable.empty()).subscribe(ts);
ts.assertNoValues();
ts.assertNoErrors();
ts.assertComplete();
}
@Test
public void testMapperThrows() {
Observable.just(1).concatMapEager(new Function<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> apply(Integer t) {
throw new TestException();
}
}).subscribe(ts);
ts.assertNoValues();
ts.assertNotComplete();
ts.assertError(TestException.class);
}
@Test(expected = IllegalArgumentException.class)
public void testInvalidMaxConcurrent() {
Observable.just(1).concatMapEager(toJust, 0, Observable.bufferSize());
}
@Test(expected = IllegalArgumentException.class)
public void testInvalidCapacityHint() {
Observable.just(1).concatMapEager(toJust, Observable.bufferSize(), 0);
}
@Test
// @SuppressWarnings("unchecked")
@Ignore("Observable doesn't do backpressure")
public void testBackpressure() {
// Observable.concatArrayEager(Observable.just(1), Observable.just(1)).subscribe(ts);
//
// ts.assertNoErrors();
// ts.assertNoValues();
// ts.assertNotComplete();
//
// ts.request(1);
// ts.assertValue(1);
// ts.assertNoErrors();
// ts.assertNotComplete();
//
// ts.request(1);
// ts.assertValues(1, 1);
// ts.assertNoErrors();
// ts.assertComplete();
}
@Test
public void testAsynchronousRun() {
Observable.range(1, 2).concatMapEager(new Function<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> apply(Integer t) {
return Observable.range(1, 1000).subscribeOn(Schedulers.computation());
}
}).observeOn(Schedulers.newThread()).subscribe(ts);
ts.awaitTerminalEvent(5, TimeUnit.SECONDS);
ts.assertNoErrors();
ts.assertValueCount(2000);
}
@Test
public void testReentrantWork() {
final PublishSubject<Integer> subject = PublishSubject.create();
final AtomicBoolean once = new AtomicBoolean();
subject.concatMapEager(new Function<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> apply(Integer t) {
return Observable.just(t);
}
})
.doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
if (once.compareAndSet(false, true)) {
subject.onNext(2);
}
}
})
.subscribe(ts);
subject.onNext(1);
ts.assertNoErrors();
ts.assertNotComplete();
ts.assertValues(1, 2);
}
@Test
@Ignore("Observable doesn't do backpressure so it can't bound its input count")
public void testPrefetchIsBounded() {
final AtomicInteger count = new AtomicInteger();
TestObserver<Object> ts = TestObserver.create();
Observable.just(1).concatMapEager(new Function<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> apply(Integer t) {
return Observable.range(1, Observable.bufferSize() * 2)
.doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
}).hide();
}
}).subscribe(ts);
ts.assertNoErrors();
ts.assertNoValues();
ts.assertNotComplete();
Assert.assertEquals(Observable.bufferSize(), count.get());
}
@Test
@Ignore("Null values are not allowed in RS")
public void testInnerNull() {
Observable.just(1).concatMapEager(new Function<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> apply(Integer t) {
return Observable.just(null);
}
}).subscribe(ts);
ts.assertNoErrors();
ts.assertComplete();
ts.assertValue(null);
}
@Test
@Ignore("Observable doesn't do backpressure")
public void testMaxConcurrent5() {
// final List<Long> requests = new ArrayList<Long>();
// Observable.range(1, 100).doOnRequest(new LongConsumer() {
// @Override
// public void accept(long reqCount) {
// requests.add(reqCount);
// }
// }).concatMapEager(toJust, 5, Observable.bufferSize()).subscribe(ts);
//
// ts.assertNoErrors();
// ts.assertValueCount(100);
// ts.assertComplete();
//
// Assert.assertEquals(5, (long) requests.get(0));
// Assert.assertEquals(1, (long) requests.get(1));
// Assert.assertEquals(1, (long) requests.get(2));
// Assert.assertEquals(1, (long) requests.get(3));
// Assert.assertEquals(1, (long) requests.get(4));
// Assert.assertEquals(1, (long) requests.get(5));
}
@SuppressWarnings("unchecked")
@Test
@Ignore("Currently there are no 2-9 argument variants, use concatArrayEager()")
public void many() throws Exception {
for (int i = 2; i < 10; i++) {
Class<?>[] clazz = new Class[i];
Arrays.fill(clazz, Observable.class);
Observable<Integer>[] obs = new Observable[i];
Arrays.fill(obs, Observable.just(1));
Integer[] expected = new Integer[i];
Arrays.fill(expected, 1);
Method m = Observable.class.getMethod("concatEager", clazz);
TestObserver<Integer> ts = TestObserver.create();
((Observable<Integer>)m.invoke(null, (Object[])obs)).subscribe(ts);
ts.assertValues(expected);
ts.assertNoErrors();
ts.assertComplete();
}
}
@SuppressWarnings("unchecked")
@Test
public void capacityHint() {
Observable<Integer> source = Observable.just(1);
TestObserver<Integer> ts = TestObserver.create();
Observable.concatEager(Arrays.asList(source, source, source), 1, 1).subscribe(ts);
ts.assertValues(1, 1, 1);
ts.assertNoErrors();
ts.assertComplete();
}
@Test
public void Observable() {
Observable<Integer> source = Observable.just(1);
TestObserver<Integer> ts = TestObserver.create();
Observable.concatEager(Observable.just(source, source, source)).subscribe(ts);
ts.assertValues(1, 1, 1);
ts.assertNoErrors();
ts.assertComplete();
}
@Test
public void ObservableCapacityHint() {
Observable<Integer> source = Observable.just(1);
TestObserver<Integer> ts = TestObserver.create();
Observable.concatEager(Observable.just(source, source, source), 1, 1).subscribe(ts);
ts.assertValues(1, 1, 1);
ts.assertNoErrors();
ts.assertComplete();
}
@SuppressWarnings("unchecked")
@Test
public void badCapacityHint() throws Exception {
Observable<Integer> source = Observable.just(1);
try {
Observable.concatEager(Arrays.asList(source, source, source), 1, -99);
} catch (IllegalArgumentException ex) {
assertEquals("prefetch > 0 required but it was -99", ex.getMessage());
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Test
public void mappingBadCapacityHint() throws Exception {
Observable<Integer> source = Observable.just(1);
try {
Observable.just(source, source, source).concatMapEager((Function)Functions.identity(), 10, -99);
} catch (IllegalArgumentException ex) {
assertEquals("prefetch > 0 required but it was -99", ex.getMessage());
}
}
@SuppressWarnings("unchecked")
@Test
public void concatEagerIterable() {
Observable.concatEager(Arrays.asList(Observable.just(1), Observable.just(2)))
.test()
.assertResult(1, 2);
}
@Test
public void dispose() {
TestHelper.checkDisposed(Observable.just(1).hide().concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return Observable.range(1, 2);
}
}));
}
@Test
public void empty() {
Observable.<Integer>empty().hide().concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return Observable.range(1, 2);
}
})
.test()
.assertResult();
}
@Test
public void innerError() {
Observable.<Integer>just(1).hide().concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return Observable.error(new TestException());
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void innerErrorMaxConcurrency() {
Observable.<Integer>just(1).hide().concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return Observable.error(new TestException());
}
}, 1, 128)
.test()
.assertFailure(TestException.class);
}
@Test
public void innerCallableThrows() {
Observable.<Integer>just(1).hide().concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return Observable.fromCallable(new Callable<Integer>() {
@Override
public Integer call() throws Exception {
throw new TestException();
}
});
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void innerOuterRace() {
for (int i = 0; i < 500; i++) {
List<Throwable> errors = TestHelper.trackPluginErrors();
try {
final PublishSubject<Integer> ps1 = PublishSubject.create();
final PublishSubject<Integer> ps2 = PublishSubject.create();
TestObserver<Integer> to = ps1.concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return ps2;
}
}).test();
final TestException ex1 = new TestException();
final TestException ex2 = new TestException();
ps1.onNext(1);
Runnable r1 = new Runnable() {
@Override
public void run() {
ps1.onError(ex1);
}
};
Runnable r2 = new Runnable() {
@Override
public void run() {
ps2.onError(ex2);
}
};
TestHelper.race(r1, r2, Schedulers.single());
to.assertSubscribed().assertNoValues().assertNotComplete();
Throwable ex = to.errors().get(0);
if (ex instanceof CompositeException) {
List<Throwable> es = TestHelper.errorList(to);
TestHelper.assertError(es, 0, TestException.class);
TestHelper.assertError(es, 1, TestException.class);
} else {
to.assertError(TestException.class);
if (!errors.isEmpty()) {
TestHelper.assertUndeliverable(errors, 0, TestException.class);
}
}
} finally {
RxJavaPlugins.reset();
}
}
}
@Test
public void nextCancelRace() {
for (int i = 0; i < 500; i++) {
final PublishSubject<Integer> ps1 = PublishSubject.create();
final TestObserver<Integer> to = ps1.concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return Observable.never();
}
}).test();
Runnable r1 = new Runnable() {
@Override
public void run() {
ps1.onNext(1);
}
};
Runnable r2 = new Runnable() {
@Override
public void run() {
to.cancel();
}
};
TestHelper.race(r1, r2, Schedulers.single());
to.assertEmpty();
}
}
@Test
public void mapperCancels() {
final TestObserver<Integer> to = new TestObserver<Integer>();
Observable.just(1).hide()
.concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
to.cancel();
return Observable.never();
}
}, 1, 128)
.subscribe(to);
to.assertEmpty();
}
@Test
public void innerErrorFused() {
Observable.<Integer>just(1).hide().concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return Observable.range(1, 2).map(new Function<Integer, Integer>() {
@Override
public Integer apply(Integer v) throws Exception {
throw new TestException();
}
});
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void innerErrorAfterPoll() {
final UnicastSubject<Integer> us = UnicastSubject.create();
us.onNext(1);
TestObserver<Integer> to = new TestObserver<Integer>() {
@Override
public void onNext(Integer t) {
super.onNext(t);
us.onError(new TestException());
}
};
Observable.<Integer>just(1).hide()
.concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return us;
}
}, 1, 128)
.subscribe(to);
to
.assertFailure(TestException.class, 1);
}
@Test
public void fuseAndTake() {
UnicastSubject<Integer> us = UnicastSubject.create();
us.onNext(1);
us.onComplete();
us.concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer v) throws Exception {
return Observable.just(1);
}
})
.take(1)
.test()
.assertResult(1);
}
@Test
public void doubleOnSubscribe() {
TestHelper.checkDoubleOnSubscribeObservable(new Function<Observable<Object>, ObservableSource<Object>>() {
@Override
public ObservableSource<Object> apply(Observable<Object> o) throws Exception {
return o.concatMapEager(new Function<Object, ObservableSource<Object>>() {
@Override
public ObservableSource<Object> apply(Object v) throws Exception {
return Observable.just(v);
}
});
}
});
}
@Test
public void oneDelayed() {
Observable.just(1, 2, 3, 4, 5)
.concatMapEager(new Function<Integer, ObservableSource<Integer>>() {
@Override
public ObservableSource<Integer> apply(Integer i) throws Exception {
return i == 3 ? Observable.just(i) : Observable
.just(i)
.delay(1, TimeUnit.MILLISECONDS, Schedulers.io());
}
})
.observeOn(Schedulers.io())
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertResult(1, 2, 3, 4, 5)
;
}
}