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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 static org.junit.Assert.*;
import static org.mockito.Matchers.*;
import static org.mockito.Mockito.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InOrder;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import rx.Observable.OnSubscribeFunc;
import rx.observables.ConnectableObservable;
import rx.schedulers.Schedulers;
import rx.schedulers.TestScheduler;
import rx.subscriptions.BooleanSubscription;
import rx.subscriptions.Subscriptions;
import rx.util.functions.Action1;
import rx.util.functions.Action2;
import rx.util.functions.Func0;
import rx.util.functions.Func1;
import rx.util.functions.Func2;
public class ObservableTests {
@Mock
Observer<Integer> w;
private static final Func1<Integer, Boolean> IS_EVEN = new Func1<Integer, Boolean>() {
@Override
public Boolean call(Integer value) {
return value % 2 == 0;
}
};
@Before
public void before() {
MockitoAnnotations.initMocks(this);
}
@Test
public void fromArray() {
String[] items = new String[] { "one", "two", "three" };
assertEquals(new Integer(3), Observable.from(items).count().toBlockingObservable().single());
assertEquals("two", Observable.from(items).skip(1).take(1).toBlockingObservable().single());
assertEquals("three", Observable.from(items).takeLast(1).toBlockingObservable().single());
}
@Test
public void fromIterable() {
ArrayList<String> items = new ArrayList<String>();
items.add("one");
items.add("two");
items.add("three");
assertEquals(new Integer(3), Observable.from(items).count().toBlockingObservable().single());
assertEquals("two", Observable.from(items).skip(1).take(1).toBlockingObservable().single());
assertEquals("three", Observable.from(items).takeLast(1).toBlockingObservable().single());
}
@Test
public void fromArityArgs3() {
Observable<String> items = Observable.from("one", "two", "three");
assertEquals(new Integer(3), items.count().toBlockingObservable().single());
assertEquals("two", items.skip(1).take(1).toBlockingObservable().single());
assertEquals("three", items.takeLast(1).toBlockingObservable().single());
}
@Test
public void fromArityArgs1() {
Observable<String> items = Observable.from("one");
assertEquals(new Integer(1), items.count().toBlockingObservable().single());
assertEquals("one", items.takeLast(1).toBlockingObservable().single());
}
@Test
public void testCreate() {
Observable<String> observable = Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> Observer) {
Observer.onNext("one");
Observer.onNext("two");
Observer.onNext("three");
Observer.onCompleted();
return Subscriptions.empty();
}
});
@SuppressWarnings("unchecked")
Observer<String> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
verify(aObserver, times(1)).onNext("one");
verify(aObserver, times(1)).onNext("two");
verify(aObserver, times(1)).onNext("three");
verify(aObserver, never()).onError(any(Throwable.class));
verify(aObserver, times(1)).onCompleted();
}
@Test
public void testCountAFewItems() {
Observable<String> observable = Observable.from("a", "b", "c", "d");
observable.count().subscribe(w);
// we should be called only once
verify(w, times(1)).onNext(anyInt());
verify(w).onNext(4);
verify(w, never()).onError(any(Throwable.class));
verify(w, times(1)).onCompleted();
}
@Test
public void testCountZeroItems() {
Observable<String> observable = Observable.empty();
observable.count().subscribe(w);
// we should be called only once
verify(w, times(1)).onNext(anyInt());
verify(w).onNext(0);
verify(w, never()).onError(any(Throwable.class));
verify(w, times(1)).onCompleted();
}
@Test
public void testCountError() {
Observable<String> o = Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> obsv) {
obsv.onError(new RuntimeException());
return Subscriptions.empty();
}
});
o.count().subscribe(w);
verify(w, never()).onNext(anyInt());
verify(w, never()).onCompleted();
verify(w, times(1)).onError(any(RuntimeException.class));
}
public void testTakeFirstWithPredicateOfSome() {
Observable<Integer> observable = Observable.from(1, 3, 5, 4, 6, 3);
observable.takeFirst(IS_EVEN).subscribe(w);
verify(w, times(1)).onNext(anyInt());
verify(w).onNext(4);
verify(w, times(1)).onCompleted();
verify(w, never()).onError(any(Throwable.class));
}
@Test
public void testTakeFirstWithPredicateOfNoneMatchingThePredicate() {
Observable<Integer> observable = Observable.from(1, 3, 5, 7, 9, 7, 5, 3, 1);
observable.takeFirst(IS_EVEN).subscribe(w);
verify(w, never()).onNext(anyInt());
verify(w, times(1)).onCompleted();
verify(w, never()).onError(any(Throwable.class));
}
@Test
public void testTakeFirstOfSome() {
Observable<Integer> observable = Observable.from(1, 2, 3);
observable.takeFirst().subscribe(w);
verify(w, times(1)).onNext(anyInt());
verify(w).onNext(1);
verify(w, times(1)).onCompleted();
verify(w, never()).onError(any(Throwable.class));
}
@Test
public void testTakeFirstOfNone() {
Observable<Integer> observable = Observable.empty();
observable.takeFirst().subscribe(w);
verify(w, never()).onNext(anyInt());
verify(w, times(1)).onCompleted();
verify(w, never()).onError(any(Throwable.class));
}
@Test
public void testFirstOfNone() {
Observable<Integer> observable = Observable.empty();
observable.first().subscribe(w);
verify(w, never()).onNext(anyInt());
verify(w, never()).onCompleted();
verify(w, times(1)).onError(isA(IllegalArgumentException.class));
}
@Test
public void testFirstWithPredicateOfNoneMatchingThePredicate() {
Observable<Integer> observable = Observable.from(1, 3, 5, 7, 9, 7, 5, 3, 1);
observable.first(IS_EVEN).subscribe(w);
verify(w, never()).onNext(anyInt());
verify(w, never()).onCompleted();
verify(w, times(1)).onError(isA(IllegalArgumentException.class));
}
@Test
public void testReduce() {
Observable<Integer> observable = Observable.from(1, 2, 3, 4);
observable.reduce(new Func2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer t1, Integer t2) {
return t1 + t2;
}
}).subscribe(w);
// we should be called only once
verify(w, times(1)).onNext(anyInt());
verify(w).onNext(10);
}
/**
* A reduce should fail with an IllegalArgumentException if done on an empty Observable.
*/
@Test(expected = IllegalArgumentException.class)
public void testReduceWithEmptyObservable() {
Observable<Integer> observable = Observable.range(1, 0);
observable.reduce(new Func2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer t1, Integer t2) {
return t1 + t2;
}
}).toBlockingObservable().forEach(new Action1<Integer>() {
@Override
public void call(Integer t1) {
// do nothing ... we expect an exception instead
}
});
fail("Expected an exception to be thrown");
}
/**
* A reduce on an empty Observable and a seed should just pass the seed through.
*
* This is confirmed at https://github.com/Netflix/RxJava/issues/423#issuecomment-27642456
*/
@Test
public void testReduceWithEmptyObservableAndSeed() {
Observable<Integer> observable = Observable.range(1, 0);
int value = observable.reduce(1, new Func2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer t1, Integer t2) {
return t1 + t2;
}
}).toBlockingObservable().last();
assertEquals(1, value);
}
@Test
public void testReduceWithInitialValue() {
Observable<Integer> observable = Observable.from(1, 2, 3, 4);
observable.reduce(50, new Func2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer t1, Integer t2) {
return t1 + t2;
}
}).subscribe(w);
// we should be called only once
verify(w, times(1)).onNext(anyInt());
verify(w).onNext(60);
}
@Test
public void testOnSubscribeFails() {
@SuppressWarnings("unchecked")
Observer<String> observer = mock(Observer.class);
final RuntimeException re = new RuntimeException("bad impl");
Observable<String> o = Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> t1) {
throw re;
}
});
o.subscribe(observer);
verify(observer, times(0)).onNext(anyString());
verify(observer, times(0)).onCompleted();
verify(observer, times(1)).onError(re);
}
@Test
public void testMaterializeDematerializeChaining() {
Observable<Integer> obs = Observable.just(1);
Observable<Integer> chained = obs.materialize().dematerialize();
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
chained.subscribe(observer);
verify(observer, times(1)).onNext(1);
verify(observer, times(1)).onCompleted();
verify(observer, times(0)).onError(any(Throwable.class));
}
/**
* The error from the user provided Observer is not handled by the subscribe method try/catch.
*
* It is handled by the AtomicObserver that wraps the provided Observer.
*
* Result: Passes (if AtomicObserver functionality exists)
*/
@Test
public void testCustomObservableWithErrorInObserverAsynchronous() throws InterruptedException {
final CountDownLatch latch = new CountDownLatch(1);
final AtomicInteger count = new AtomicInteger();
final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(final Observer<? super String> observer) {
final BooleanSubscription s = new BooleanSubscription();
new Thread(new Runnable() {
@Override
public void run() {
try {
if (!s.isUnsubscribed()) {
observer.onNext("1");
observer.onNext("2");
observer.onNext("three");
observer.onNext("4");
observer.onCompleted();
}
} finally {
latch.countDown();
}
}
}).start();
return s;
}
}).subscribe(new Observer<String>() {
@Override
public void onCompleted() {
System.out.println("completed");
}
@Override
public void onError(Throwable e) {
error.set(e);
System.out.println("error");
e.printStackTrace();
}
@Override
public void onNext(String v) {
int num = Integer.parseInt(v);
System.out.println(num);
// doSomething(num);
count.incrementAndGet();
}
});
// wait for async sequence to complete
latch.await();
assertEquals(2, count.get());
assertNotNull(error.get());
if (!(error.get() instanceof NumberFormatException)) {
fail("It should be a NumberFormatException");
}
}
/**
* The error from the user provided Observer is handled by the subscribe try/catch because this is synchronous
*
* Result: Passes
*/
@Test
public void testCustomObservableWithErrorInObserverSynchronous() {
final AtomicInteger count = new AtomicInteger();
final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
observer.onNext("1");
observer.onNext("2");
observer.onNext("three");
observer.onNext("4");
observer.onCompleted();
return Subscriptions.empty();
}
}).subscribe(new Observer<String>() {
@Override
public void onCompleted() {
System.out.println("completed");
}
@Override
public void onError(Throwable e) {
error.set(e);
System.out.println("error");
e.printStackTrace();
}
@Override
public void onNext(String v) {
int num = Integer.parseInt(v);
System.out.println(num);
// doSomething(num);
count.incrementAndGet();
}
});
assertEquals(2, count.get());
assertNotNull(error.get());
if (!(error.get() instanceof NumberFormatException)) {
fail("It should be a NumberFormatException");
}
}
/**
* The error from the user provided Observable is handled by the subscribe try/catch because this is synchronous
*
*
* Result: Passes
*/
@Test
public void testCustomObservableWithErrorInObservableSynchronous() {
final AtomicInteger count = new AtomicInteger();
final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
observer.onNext("1");
observer.onNext("2");
throw new NumberFormatException();
}
}).subscribe(new Observer<String>() {
@Override
public void onCompleted() {
System.out.println("completed");
}
@Override
public void onError(Throwable e) {
error.set(e);
System.out.println("error");
e.printStackTrace();
}
@Override
public void onNext(String v) {
System.out.println(v);
count.incrementAndGet();
}
});
assertEquals(2, count.get());
assertNotNull(error.get());
if (!(error.get() instanceof NumberFormatException)) {
fail("It should be a NumberFormatException");
}
}
@Test
public void testPublish() throws InterruptedException {
final AtomicInteger counter = new AtomicInteger();
ConnectableObservable<String> o = Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(final Observer<? super String> observer) {
final BooleanSubscription subscription = new BooleanSubscription();
new Thread(new Runnable() {
@Override
public void run() {
counter.incrementAndGet();
observer.onNext("one");
observer.onCompleted();
}
}).start();
return subscription;
}
}).publish();
final CountDownLatch latch = new CountDownLatch(2);
// subscribe once
o.subscribe(new Action1<String>() {
@Override
public void call(String v) {
assertEquals("one", v);
latch.countDown();
}
});
// subscribe again
o.subscribe(new Action1<String>() {
@Override
public void call(String v) {
assertEquals("one", v);
latch.countDown();
}
});
Subscription s = o.connect();
try {
if (!latch.await(1000, TimeUnit.MILLISECONDS)) {
fail("subscriptions did not receive values");
}
assertEquals(1, counter.get());
} finally {
s.unsubscribe();
}
}
@Test
public void testPublishLast() throws InterruptedException {
final AtomicInteger count = new AtomicInteger();
ConnectableObservable<String> connectable = Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(final Observer<? super String> observer) {
count.incrementAndGet();
final BooleanSubscription subscription = new BooleanSubscription();
new Thread(new Runnable() {
@Override
public void run() {
observer.onNext("first");
observer.onNext("last");
observer.onCompleted();
}
}).start();
return subscription;
}
}).publishLast();
// subscribe once
final CountDownLatch latch = new CountDownLatch(1);
connectable.subscribe(new Action1<String>() {
@Override
public void call(String value) {
assertEquals("last", value);
latch.countDown();
}
});
// subscribe twice
connectable.subscribe(new Action1<String>() {
@Override
public void call(String _) {
}
});
Subscription subscription = connectable.connect();
assertTrue(latch.await(1000, TimeUnit.MILLISECONDS));
assertEquals(1, count.get());
subscription.unsubscribe();
}
@Test
public void testReplay() throws InterruptedException {
final AtomicInteger counter = new AtomicInteger();
ConnectableObservable<String> o = Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(final Observer<? super String> observer) {
final BooleanSubscription subscription = new BooleanSubscription();
new Thread(new Runnable() {
@Override
public void run() {
counter.incrementAndGet();
observer.onNext("one");
observer.onCompleted();
}
}).start();
return subscription;
}
}).replay();
// we connect immediately and it will emit the value
Subscription s = o.connect();
try {
// we then expect the following 2 subscriptions to get that same value
final CountDownLatch latch = new CountDownLatch(2);
// subscribe once
o.subscribe(new Action1<String>() {
@Override
public void call(String v) {
assertEquals("one", v);
latch.countDown();
}
});
// subscribe again
o.subscribe(new Action1<String>() {
@Override
public void call(String v) {
assertEquals("one", v);
latch.countDown();
}
});
if (!latch.await(1000, TimeUnit.MILLISECONDS)) {
fail("subscriptions did not receive values");
}
assertEquals(1, counter.get());
} finally {
s.unsubscribe();
}
}
@Test
public void testCache() throws InterruptedException {
final AtomicInteger counter = new AtomicInteger();
Observable<String> o = Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(final Observer<? super String> observer) {
final BooleanSubscription subscription = new BooleanSubscription();
new Thread(new Runnable() {
@Override
public void run() {
counter.incrementAndGet();
observer.onNext("one");
observer.onCompleted();
}
}).start();
return subscription;
}
}).cache();
// we then expect the following 2 subscriptions to get that same value
final CountDownLatch latch = new CountDownLatch(2);
// subscribe once
o.subscribe(new Action1<String>() {
@Override
public void call(String v) {
assertEquals("one", v);
latch.countDown();
}
});
// subscribe again
o.subscribe(new Action1<String>() {
@Override
public void call(String v) {
assertEquals("one", v);
latch.countDown();
}
});
if (!latch.await(1000, TimeUnit.MILLISECONDS)) {
fail("subscriptions did not receive values");
}
assertEquals(1, counter.get());
}
/**
* https://github.com/Netflix/RxJava/issues/198
*
* Rx Design Guidelines 5.2
*
* "when calling the Subscribe method that only has an onNext argument, the OnError behavior will be
* to rethrow the exception on the thread that the message comes out from the Observable.
* The OnCompleted behavior in this case is to do nothing."
*/
@Test
public void testErrorThrownWithoutErrorHandlerSynchronous() {
try {
Observable.error(new RuntimeException("failure")).subscribe(new Action1<Object>() {
@Override
public void call(Object t1) {
// won't get anything
}
});
fail("expected exception");
} catch (Throwable e) {
assertEquals("failure", e.getMessage());
}
}
/**
* https://github.com/Netflix/RxJava/issues/198
*
* Rx Design Guidelines 5.2
*
* "when calling the Subscribe method that only has an onNext argument, the OnError behavior will be
* to rethrow the exception on the thread that the message comes out from the Observable.
* The OnCompleted behavior in this case is to do nothing."
*
* @throws InterruptedException
*/
@Test
public void testErrorThrownWithoutErrorHandlerAsynchronous() throws InterruptedException {
final CountDownLatch latch = new CountDownLatch(1);
final AtomicReference<Throwable> exception = new AtomicReference<Throwable>();
Observable.create(new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(final Observer<? super String> observer) {
new Thread(new Runnable() {
@Override
public void run() {
try {
observer.onError(new Error("failure"));
} catch (Throwable e) {
// without an onError handler it has to just throw on whatever thread invokes it
exception.set(e);
}
latch.countDown();
}
}).start();
return Subscriptions.empty();
}
}).subscribe(new Action1<String>() {
@Override
public void call(String t1) {
}
});
// wait for exception
latch.await(3000, TimeUnit.MILLISECONDS);
assertNotNull(exception.get());
assertEquals("failure", exception.get().getMessage());
}
@Test
public void testTakeWithErrorInObserver() {
final AtomicInteger count = new AtomicInteger();
final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
Observable.from("1", "2", "three", "4").take(3).subscribe(new Observer<String>() {
@Override
public void onCompleted() {
System.out.println("completed");
}
@Override
public void onError(Throwable e) {
error.set(e);
System.out.println("error");
e.printStackTrace();
}
@Override
public void onNext(String v) {
int num = Integer.parseInt(v);
System.out.println(num);
// doSomething(num);
count.incrementAndGet();
}
});
assertEquals(2, count.get());
assertNotNull(error.get());
if (!(error.get() instanceof NumberFormatException)) {
fail("It should be a NumberFormatException");
}
}
@Test
public void testOfType() {
Observable<String> observable = Observable.from(1, "abc", false, 2L).ofType(String.class);
@SuppressWarnings("unchecked")
Observer<Object> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
verify(aObserver, never()).onNext(1);
verify(aObserver, times(1)).onNext("abc");
verify(aObserver, never()).onNext(false);
verify(aObserver, never()).onNext(2L);
verify(aObserver, never()).onError(
org.mockito.Matchers.any(Throwable.class));
verify(aObserver, times(1)).onCompleted();
}
@Test
public void testOfTypeWithPolymorphism() {
ArrayList<Integer> l1 = new ArrayList<Integer>();
l1.add(1);
LinkedList<Integer> l2 = new LinkedList<Integer>();
l2.add(2);
@SuppressWarnings("rawtypes")
Observable<List> observable = Observable.<Object> from(l1, l2, "123").ofType(List.class);
@SuppressWarnings("unchecked")
Observer<Object> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
verify(aObserver, times(1)).onNext(l1);
verify(aObserver, times(1)).onNext(l2);
verify(aObserver, never()).onNext("123");
verify(aObserver, never()).onError(
org.mockito.Matchers.any(Throwable.class));
verify(aObserver, times(1)).onCompleted();
}
@Test
public void testContains() {
Observable<Boolean> observable = Observable.from("a", "b", null).contains("b");
@SuppressWarnings("unchecked")
Observer<Object> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
verify(aObserver, times(1)).onNext(true);
verify(aObserver, never()).onNext(false);
verify(aObserver, never()).onError(
org.mockito.Matchers.any(Throwable.class));
verify(aObserver, times(1)).onCompleted();
}
@Test
public void testContainsWithInexistence() {
Observable<Boolean> observable = Observable.from("a", "b", null).contains("c");
@SuppressWarnings("unchecked")
Observer<Object> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
verify(aObserver, times(1)).onNext(false);
verify(aObserver, never()).onNext(true);
verify(aObserver, never()).onError(
org.mockito.Matchers.any(Throwable.class));
verify(aObserver, times(1)).onCompleted();
}
@Test
public void testContainsWithNull() {
Observable<Boolean> observable = Observable.from("a", "b", null).contains(null);
@SuppressWarnings("unchecked")
Observer<Object> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
verify(aObserver, times(1)).onNext(true);
verify(aObserver, never()).onNext(false);
verify(aObserver, never()).onError(
org.mockito.Matchers.any(Throwable.class));
verify(aObserver, times(1)).onCompleted();
}
@Test
public void testContainsWithEmptyObservable() {
Observable<Boolean> observable = Observable.<String> empty().contains("a");
@SuppressWarnings("unchecked")
Observer<Object> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
verify(aObserver, times(1)).onNext(false);
verify(aObserver, never()).onNext(true);
verify(aObserver, never()).onError(
org.mockito.Matchers.any(Throwable.class));
verify(aObserver, times(1)).onCompleted();
}
@Test
public void testIgnoreElements() {
Observable<Integer> observable = Observable.from(1, 2, 3).ignoreElements();
@SuppressWarnings("unchecked")
Observer<Integer> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
verify(aObserver, never()).onNext(any(Integer.class));
verify(aObserver, never()).onError(any(Throwable.class));
verify(aObserver, times(1)).onCompleted();
}
@Test
public void testFromWithScheduler() {
TestScheduler scheduler = new TestScheduler();
Observable<Integer> observable = Observable.from(Arrays.asList(1, 2), scheduler);
@SuppressWarnings("unchecked")
Observer<Integer> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
scheduler.advanceTimeBy(1, TimeUnit.MILLISECONDS);
InOrder inOrder = inOrder(aObserver);
inOrder.verify(aObserver, times(1)).onNext(1);
inOrder.verify(aObserver, times(1)).onNext(2);
inOrder.verify(aObserver, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testStartWithWithScheduler() {
TestScheduler scheduler = new TestScheduler();
Observable<Integer> observable = Observable.from(3, 4).startWith(Arrays.asList(1, 2), scheduler);
@SuppressWarnings("unchecked")
Observer<Integer> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
scheduler.advanceTimeBy(1, TimeUnit.MILLISECONDS);
InOrder inOrder = inOrder(aObserver);
inOrder.verify(aObserver, times(1)).onNext(1);
inOrder.verify(aObserver, times(1)).onNext(2);
inOrder.verify(aObserver, times(1)).onNext(3);
inOrder.verify(aObserver, times(1)).onNext(4);
inOrder.verify(aObserver, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testRangeWithScheduler() {
TestScheduler scheduler = new TestScheduler();
Observable<Integer> observable = Observable.range(3, 4, scheduler);
@SuppressWarnings("unchecked")
Observer<Integer> aObserver = mock(Observer.class);
observable.subscribe(aObserver);
scheduler.advanceTimeBy(1, TimeUnit.MILLISECONDS);
InOrder inOrder = inOrder(aObserver);
inOrder.verify(aObserver, times(1)).onNext(3);
inOrder.verify(aObserver, times(1)).onNext(4);
inOrder.verify(aObserver, times(1)).onNext(5);
inOrder.verify(aObserver, times(1)).onNext(6);
inOrder.verify(aObserver, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testCollectToList() {
List<Integer> list = Observable.from(1, 2, 3).collect(new ArrayList<Integer>(), new Action2<List<Integer>, Integer>() {
@Override
public void call(List<Integer> list, Integer v) {
list.add(v);
}
}).toBlockingObservable().last();
assertEquals(3, list.size());
assertEquals(1, list.get(0).intValue());
assertEquals(2, list.get(1).intValue());
assertEquals(3, list.get(2).intValue());
}
@Test
public void testCollectToString() {
String value = Observable.from(1, 2, 3).collect(new StringBuilder(), new Action2<StringBuilder, Integer>() {
@Override
public void call(StringBuilder sb, Integer v) {
if (sb.length() > 0) {
sb.append("-");
}
sb.append(v);
}
}).toBlockingObservable().last().toString();
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