Beispiel #1
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 @Test
 public void fromArray() {
   String[] items = new String[] {"one", "two", "three"};
   assertEquals((Long) 3L, Observable.fromArray(items).count().toBlocking().single());
   assertEquals("two", Observable.fromArray(items).skip(1).take(1).toBlocking().single());
   assertEquals("three", Observable.fromArray(items).takeLast(1).toBlocking().single());
 }
Beispiel #2
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  @Test
  public void fromArityArgs1() {
    Observable<String> items = Observable.just("one");

    assertEquals((Long) 1L, items.count().toBlocking().single());
    assertEquals("one", items.takeLast(1).toBlocking().single());
  }
Beispiel #3
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  /**
   * A reduce on an empty Observable and a seed should just pass the seed through.
   *
   * <p>This is confirmed at https://github.com/ReactiveX/RxJava/issues/423#issuecomment-27642456
   */
  @Test
  public void testReduceWithEmptyObservableAndSeed() {
    Observable<Integer> observable = Observable.range(1, 0);
    int value = observable.reduce(1, (t1, t2) -> t1 + t2).toBlocking().last();

    assertEquals(1, value);
  }
Beispiel #4
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  /**
   * The error from the user provided Observable is handled by the subscribe try/catch because this
   * is synchronous
   *
   * <p>Result: Passes
   */
  @Test
  public void testCustomObservableWithErrorInObservableSynchronous() {
    final AtomicInteger count = new AtomicInteger();
    final AtomicReference<Throwable> error = new AtomicReference<>();
    // FIXME custom built???
    Observable.just("1", "2")
        .concatWith(Observable.error(() -> new NumberFormatException()))
        .subscribe(
            new Observer<String>() {

              @Override
              public void onComplete() {
                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");
    }
  }
Beispiel #5
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 @Test
 public void testReduceWithInitialValue() {
   Observable<Integer> observable = Observable.just(1, 2, 3, 4);
   observable.reduce(50, (t1, t2) -> t1 + t2).subscribe(w);
   // we should be called only once
   verify(w, times(1)).onNext(anyInt());
   verify(w).onNext(60);
 }
Beispiel #6
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 @Test
 public void testFirstWithPredicateOfNoneMatchingThePredicate() {
   Observable<Integer> observable = Observable.just(1, 3, 5, 7, 9, 7, 5, 3, 1);
   observable.filter(IS_EVEN).first().subscribe(w);
   verify(w, never()).onNext(anyInt());
   verify(w, never()).onComplete();
   verify(w, times(1)).onError(isA(NoSuchElementException.class));
 }
Beispiel #7
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 @Test
 public void testFirstOfNone() {
   Observable<Integer> observable = Observable.empty();
   observable.first().subscribe(w);
   verify(w, never()).onNext(anyInt());
   verify(w, never()).onComplete();
   verify(w, times(1)).onError(isA(NoSuchElementException.class));
 }
Beispiel #8
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 @Test
 public void testTakeFirstOfNone() {
   Observable<Integer> observable = Observable.empty();
   observable.take(1).subscribe(w);
   verify(w, never()).onNext(anyInt());
   verify(w, times(1)).onComplete();
   verify(w, never()).onError(any(Throwable.class));
 }
Beispiel #9
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 @Test
 public void testTakeFirstWithPredicateOfNoneMatchingThePredicate() {
   Observable<Integer> observable = Observable.just(1, 3, 5, 7, 9, 7, 5, 3, 1);
   observable.takeFirst(IS_EVEN).subscribe(w);
   verify(w, never()).onNext(anyInt());
   verify(w, times(1)).onComplete();
   verify(w, never()).onError(any(Throwable.class));
 }
Beispiel #10
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 public void testTakeFirstWithPredicateOfSome() {
   Observable<Integer> observable = Observable.just(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)).onComplete();
   verify(w, never()).onError(any(Throwable.class));
 }
Beispiel #11
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  @Test
  public void testCountError() {
    Observable<String> o = Observable.error(() -> new RuntimeException());

    o.count().subscribe(w);
    verify(w, never()).onNext(anyInt());
    verify(w, never()).onComplete();
    verify(w, times(1)).onError(any(RuntimeException.class));
  }
Beispiel #12
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 @Test
 public void testCountZeroItems() {
   Observable<String> observable = Observable.empty();
   observable.count().subscribe(w);
   // we should be called only once
   verify(w, times(1)).onNext(anyLong());
   verify(w).onNext(0L);
   verify(w, never()).onError(any(Throwable.class));
   verify(w, times(1)).onComplete();
 }
Beispiel #13
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  @Test
  public void fromIterable() {
    ArrayList<String> items = new ArrayList<>();
    items.add("one");
    items.add("two");
    items.add("three");

    assertEquals((Long) 3L, Observable.fromIterable(items).count().toBlocking().single());
    assertEquals("two", Observable.fromIterable(items).skip(1).take(1).toBlocking().single());
    assertEquals("three", Observable.fromIterable(items).takeLast(1).toBlocking().single());
  }
Beispiel #14
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  @Test
  public void testIgnoreElements() {
    Observable<Integer> observable = Observable.just(1, 2, 3).ignoreElements();

    Subscriber<Object> observer = TestHelper.mockSubscriber();

    observable.subscribe(observer);

    verify(observer, never()).onNext(any(Integer.class));
    verify(observer, never()).onError(any(Throwable.class));
    verify(observer, times(1)).onComplete();
  }
Beispiel #15
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  @Test
  public void testCountAFewItems() {
    Observable<String> observable = Observable.just("a", "b", "c", "d");

    observable.count().subscribe(w);

    // we should be called only once
    verify(w, times(1)).onNext(anyLong());
    verify(w).onNext(4L);
    verify(w, never()).onError(any(Throwable.class));
    verify(w, times(1)).onComplete();
  }
Beispiel #16
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  @Test
  public void testMaterializeDematerializeChaining() {
    Observable<Integer> obs = Observable.just(1);
    Observable<Integer> chained = obs.materialize().dematerialize();

    Subscriber<Integer> observer = TestHelper.mockSubscriber();

    chained.subscribe(observer);

    verify(observer, times(1)).onNext(1);
    verify(observer, times(1)).onComplete();
    verify(observer, times(0)).onError(any(Throwable.class));
  }
Beispiel #17
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  @Test
  public void testContainsWithEmptyObservable() {
    Observable<Boolean> observable = Observable.<String>empty().contains("a");

    Subscriber<Object> observer = TestHelper.mockSubscriber();

    observable.subscribe(observer);

    verify(observer, times(1)).onNext(false);
    verify(observer, never()).onNext(true);
    verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
    verify(observer, times(1)).onComplete();
  }
Beispiel #18
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  /** A reduce should fail with an NoSuchElementException if done on an empty Observable. */
  @Test(expected = NoSuchElementException.class)
  public void testReduceWithEmptyObservable() {
    Observable<Integer> observable = Observable.range(1, 0);
    observable
        .reduce((t1, t2) -> t1 + t2)
        .toBlocking()
        .forEach(
            t1 -> {
              // do nothing ... we expect an exception instead
            });

    fail("Expected an exception to be thrown");
  }
Beispiel #19
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  @Test
  public void testContains() {
    Observable<Boolean> observable =
        Observable.just("a", "b", "c").contains("b"); // FIXME nulls not allowed, changed to "c"

    Subscriber<Boolean> observer = TestHelper.mockSubscriber();

    observable.subscribe(observer);

    verify(observer, times(1)).onNext(true);
    verify(observer, never()).onNext(false);
    verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
    verify(observer, times(1)).onComplete();
  }
Beispiel #20
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  @Test
  public void testContainsWithInexistence() {
    Observable<Boolean> observable =
        Observable.just("a", "b").contains("c"); // FIXME null values are not allowed, removed

    Subscriber<Object> observer = TestHelper.mockSubscriber();

    observable.subscribe(observer);

    verify(observer, times(1)).onNext(false);
    verify(observer, never()).onNext(true);
    verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
    verify(observer, times(1)).onComplete();
  }
Beispiel #21
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  @Test
  @Ignore("null values are not allowed")
  public void testContainsWithNull() {
    Observable<Boolean> observable = Observable.just("a", "b", null).contains(null);

    Subscriber<Object> observer = TestHelper.mockSubscriber();

    observable.subscribe(observer);

    verify(observer, times(1)).onNext(true);
    verify(observer, never()).onNext(false);
    verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
    verify(observer, times(1)).onComplete();
  }
Beispiel #22
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  @Test
  public void testCreate() {

    Observable<String> observable = Observable.just("one", "two", "three");

    Subscriber<String> observer = TestHelper.mockSubscriber();

    observable.subscribe(observer);

    verify(observer, times(1)).onNext("one");
    verify(observer, times(1)).onNext("two");
    verify(observer, times(1)).onNext("three");
    verify(observer, never()).onError(any(Throwable.class));
    verify(observer, times(1)).onComplete();
  }
Beispiel #23
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  @Test
  public void testOfType() {
    Observable<String> observable = Observable.just(1, "abc", false, 2L).ofType(String.class);

    Subscriber<Object> observer = TestHelper.mockSubscriber();

    observable.subscribe(observer);

    verify(observer, never()).onNext(1);
    verify(observer, times(1)).onNext("abc");
    verify(observer, never()).onNext(false);
    verify(observer, never()).onNext(2L);
    verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
    verify(observer, times(1)).onComplete();
  }
Beispiel #24
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  @Test
  public void testPublishLast() throws InterruptedException {
    final AtomicInteger count = new AtomicInteger();
    ConnectableObservable<String> connectable =
        Observable.<String>create(
                observer -> {
                  observer.onSubscribe(EmptySubscription.INSTANCE);
                  count.incrementAndGet();
                  new Thread(
                          () -> {
                            observer.onNext("first");
                            observer.onNext("last");
                            observer.onComplete();
                          })
                      .start();
                })
            .takeLast(1)
            .publish();

    // subscribe once
    final CountDownLatch latch = new CountDownLatch(1);
    connectable.subscribe(
        value -> {
          assertEquals("last", value);
          latch.countDown();
        });

    // subscribe twice
    connectable.subscribe();

    Disposable subscription = connectable.connect();
    assertTrue(latch.await(1000, TimeUnit.MILLISECONDS));
    assertEquals(1, count.get());
    subscription.dispose();
  }
Beispiel #25
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 /**
  * https://github.com/ReactiveX/RxJava/issues/198
  *
  * <p>Rx Design Guidelines 5.2
  *
  * <p>"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
 @Ignore("Subscribers can't throw")
 public void testErrorThrownWithoutErrorHandlerAsynchronous() throws InterruptedException {
   final CountDownLatch latch = new CountDownLatch(1);
   final AtomicReference<Throwable> exception = new AtomicReference<>();
   Observable.create(
           observer -> {
             new Thread(
                     () -> {
                       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();
           })
       .subscribe();
   // wait for exception
   latch.await(3000, TimeUnit.MILLISECONDS);
   assertNotNull(exception.get());
   assertEquals("failure", exception.get().getMessage());
 }
Beispiel #26
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  @Test
  public void testTakeWithErrorInObserver() {
    final AtomicInteger count = new AtomicInteger();
    final AtomicReference<Throwable> error = new AtomicReference<>();
    Observable.just("1", "2", "three", "4")
        .take(3)
        .safeSubscribe(
            new Observer<String>() {

              @Override
              public void onComplete() {
                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");
    }
  }
Beispiel #27
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  @Test
  public void testEmptyIsEmpty() {
    Observable.<Integer>empty().subscribe(w);

    verify(w).onComplete();
    verify(w, never()).onNext(any(Integer.class));
    verify(w, never()).onError(any(Throwable.class));
  }
Beispiel #28
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 @Test
 public void testCompose() {
   TestSubscriber<String> ts = new TestSubscriber<>();
   Observable.just(1, 2, 3).compose(t1 -> t1.map(String::valueOf)).subscribe(ts);
   ts.assertTerminated();
   ts.assertNoErrors();
   ts.assertValues("1", "2", "3");
 }
Beispiel #29
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  @Test
  public void testJustWithScheduler() {
    TestScheduler scheduler = new TestScheduler();
    Observable<Integer> observable = Observable.fromArray(1, 2).subscribeOn(scheduler);

    Subscriber<Integer> observer = TestHelper.mockSubscriber();

    observable.subscribe(observer);

    scheduler.advanceTimeBy(1, TimeUnit.MILLISECONDS);

    InOrder inOrder = inOrder(observer);
    inOrder.verify(observer, times(1)).onNext(1);
    inOrder.verify(observer, times(1)).onNext(2);
    inOrder.verify(observer, times(1)).onComplete();
    inOrder.verifyNoMoreInteractions();
  }
Beispiel #30
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  @Ignore // FIXME throwing is not allowed from the create?!
  @Test
  public void testOnSubscribeFails() {
    Subscriber<String> observer = TestHelper.mockSubscriber();

    final RuntimeException re = new RuntimeException("bad impl");
    Observable<String> o =
        Observable.create(
            s -> {
              throw re;
            });

    o.subscribe(observer);
    verify(observer, times(0)).onNext(anyString());
    verify(observer, times(0)).onComplete();
    verify(observer, times(1)).onError(re);
  }