io.reactivex.rxjava3.observers.TestObserver Java Examples

private void testBindUntilEvent(LifecycleOwner owner) {
    Fragment fragment = (Fragment) owner;
    ActivityController<?> controller = startFragment(fragment);

    TestObserver<Object> testObserver = observable.compose(AndroidLifecycle.createLifecycleProvider(owner).bindUntilEvent(Lifecycle.Event.ON_STOP)).test();

    testObserver.assertNotComplete();
    controller.start();
    testObserver.assertNotComplete();
    controller.resume();
    testObserver.assertNotComplete();
    controller.pause();
    testObserver.assertNotComplete();
    controller.stop();
    testObserver.assertComplete();
}
 

@Before
public void setUp() throws Exception {
  cConsumer = new TestConsumer<>();
  dAction = new TestAction();

  ObservableTransformer<TestEffect, TestEvent> router =
      RxMobius.<TestEffect, TestEvent>subtypeEffectHandler()
          .addTransformer(A.class, (Observable<A> as) -> as.map(a -> AEvent.create(a.id())))
          .addTransformer(B.class, (Observable<B> bs) -> bs.map(b -> BEvent.create(b.id())))
          .addConsumer(C.class, cConsumer)
          .addAction(D.class, dAction)
          .addFunction(E.class, e -> AEvent.create(e.id()))
          .build();

  publishSubject = PublishSubject.create();
  testSubscriber = TestObserver.create();

  publishSubject.compose(router).subscribe(testSubscriber);
}
 

private void testBindUntilEvent(ActivityController<? extends LifecycleOwner> controller) {
    LifecycleProvider<Lifecycle.Event> activity = AndroidLifecycle.createLifecycleProvider(controller.get());

    TestObserver<Object> testObserver = observable.compose(activity.bindUntilEvent(Lifecycle.Event.ON_STOP)).test();

    controller.create();
    testObserver.assertNotComplete();
    controller.start();
    testObserver.assertNotComplete();
    controller.resume();
    testObserver.assertNotComplete();
    controller.pause();
    testObserver.assertNotComplete();
    controller.stop();
    testObserver.assertComplete();
}
 

@Test
public void shouldSupportStartingALoopWithAnInit() throws Exception {
  MobiusLoop.Builder<String, Integer, Boolean> withInit =
      builder.init(
          new Init<String, Boolean>() {
            @Nonnull
            @Override
            public First<String, Boolean> init(String model) {
              return First.first(model + "-init");
            }
          });

  ObservableTransformer<Integer, String> transformer = RxMobius.loopFrom(withInit, "hi");

  final TestObserver<String> observer = Observable.just(10).compose(transformer).test();

  observer.awaitCount(2);
  observer.assertValues("hi-init", "hi-init10");
}
 

private void testBindUntilEvent(LifecycleProvider<FragmentEvent> provider) {
    Fragment fragment = (Fragment) provider;
    startFragment(fragment);

    TestObserver<Object> testObserver = observable.compose(provider.bindUntilEvent(STOP)).test();

    fragment.onAttach(null);
    testObserver.assertNotComplete();
    fragment.onCreate(null);
    testObserver.assertNotComplete();
    fragment.onViewCreated(null, null);
    testObserver.assertNotComplete();
    fragment.onStart();
    testObserver.assertNotComplete();
    fragment.onResume();
    testObserver.assertNotComplete();
    fragment.onPause();
    testObserver.assertNotComplete();
    fragment.onStop();
    testObserver.assertComplete();
}
 

@Test
public void doNotTimeout() {
    given(timeLimiter.getTimeLimiterConfig())
        .willReturn(toConfig(Duration.ofMinutes(1)));
    TestObserver<?> observer = Observable.interval(1, TimeUnit.SECONDS)
        .take(2)
        .compose(TimeLimiterTransformer.of(timeLimiter))
        .test();

    testScheduler.advanceTimeBy(1, TimeUnit.MINUTES);

    observer.assertValueCount(2)
        .assertComplete();
    then(timeLimiter).should(times(3))
        .onSuccess();
}
 

@Test
public void oneEvent() {
    TestObserver<String> testObserver = Single.just("1")
        .delay(1, TimeUnit.MILLISECONDS, testScheduler)
        .compose(RxLifecycle.<String, String>bind(lifecycle))
        .test();

    testObserver.assertNoValues();
    testObserver.assertNoErrors();

    lifecycle.onNext("stop");
    testScheduler.advanceTimeBy(1, TimeUnit.MILLISECONDS);

    testObserver.assertNoValues();
    testObserver.assertError(CancellationException.class);
}
 

@Test
public void addRemoveRace() {
    for (int i = 0; i < 500; i++) {
        final BehaviorRelay<Object> p = BehaviorRelay.create();

        final TestObserver<Object> ts = p.test();

        Runnable r1 = new Runnable() {
            @Override
            @SuppressWarnings("CheckReturnValue")
            public void run() {
                p.test();
            }
        };

        Runnable r2 = new Runnable() {
            @Override
            public void run() {
                ts.dispose();
            }
        };

        TestHelper.race(r1, r2, Schedulers.single());
    }
}
 

@Test
public void doNotTimeout() {
    given(helloWorldService.returnHelloWorld())
        .willReturn("hello");
    given(timeLimiter.getTimeLimiterConfig())
        .willReturn(toConfig(Duration.ofMinutes(1)));
    TestObserver<?> observer = Completable.fromRunnable(helloWorldService::returnHelloWorld)
        .compose(TimeLimiterTransformer.of(timeLimiter))
        .test();

    testScheduler.advanceTimeBy(1, TimeUnit.MINUTES);

    observer.assertComplete();
    then(timeLimiter).should()
        .onSuccess();
}
 

@Test
public void crossCancel() {
    final TestObserver<Integer> ts1 = new TestObserver<Integer>();
    TestObserver<Integer> ts2 = new TestObserver<Integer>() {
        @Override
        public void onNext(Integer t) {
            super.onNext(t);
            ts1.dispose();
        }
    };

    PublishRelay<Integer> pp = PublishRelay.create();

    pp.subscribe(ts2);
    pp.subscribe(ts1);

    pp.accept(1);

    ts2.assertValue(1);

    ts1.assertNoValues();
}
 

@Test
public void addRemoveRance() throws Exception {

    for (int i = 0; i < 100; i++) {
        final PublishRelay<Integer> pp = PublishRelay.create();

        final TestObserver<Integer> ts = pp.test();

        Runnable r1 = new Runnable() {
            @Override
            public void run() {
                pp.subscribe();
            }
        };
        Runnable r2 = new Runnable() {
            @Override
            public void run() {
                ts.dispose();
            }
        };

        TestHelper.race(r1, r2, Schedulers.io());
    }
}
 

@Test
public void testBindUntilLifecycleEvent() {
    BehaviorSubject<Lifecycle.Event> lifecycle = BehaviorSubject.create();

    TestObserver<Object> testObserver =
            observable.compose(RxLifecycle.bindUntilEvent(lifecycle, Lifecycle.Event.ON_STOP)).test();

    lifecycle.onNext(Lifecycle.Event.ON_CREATE);
    testObserver.assertNotComplete();
    lifecycle.onNext(Lifecycle.Event.ON_START);
    testObserver.assertNotComplete();
    lifecycle.onNext(Lifecycle.Event.ON_RESUME);
    testObserver.assertNotComplete();
    lifecycle.onNext(Lifecycle.Event.ON_PAUSE);
    testObserver.assertNotComplete();
    lifecycle.onNext(Lifecycle.Event.ON_STOP);
    testObserver.assertComplete();
}
 

@Test public void initialValueToNewSubscriberAfterUnsubscribe() {
  PublishSubject<String> subject = PublishSubject.create();
  Observable<String> observable = subject.compose(ReplayingShare.<String>instance());

  TestObserver<String> observer1 = new TestObserver<>();
  observable.subscribe(observer1);
  observer1.assertNoValues();

  subject.onNext("Foo");
  observer1.assertValues("Foo");
  observer1.dispose();

  TestObserver<String> observer2 = new TestObserver<>();
  observable.subscribe(observer2);
  observer2.assertValues("Foo");
}
 

@Test public void valueMissedWhenNoSubscribers() {
  PublishSubject<String> subject = PublishSubject.create();
  Observable<String> observable = subject.compose(ReplayingShare.<String>instance());

  TestObserver<String> observer1 = new TestObserver<>();
  observable.subscribe(observer1);
  observer1.assertNoValues();
  observer1.dispose();

  subject.onNext("Foo");
  observer1.assertNoValues();

  TestObserver<String> observer2 = new TestObserver<>();
  observable.subscribe(observer2);
  observer2.assertNoValues();
}
 

@Test public void errorClearsCacheAndResubscribes() {
  List<String> start = new ArrayList<>();
  start.add("initA");

  PublishSubject<String> upstream = PublishSubject.create();
  Observable<String> replayed = upstream.startWithIterable(start).compose(ReplayingShare.<String>instance());

  TestObserver<String> observer1 = new TestObserver<>();
  replayed.subscribe(observer1);
  observer1.assertValues("initA");

  TestObserver<String> observer2 = new TestObserver<>();
  replayed.subscribe(observer2);
  observer1.assertValues("initA");

  RuntimeException r = new RuntimeException();
  upstream.onError(r);
  observer1.assertError(r);
  observer2.assertError(r);

  start.set(0, "initB");

  TestObserver<String> observer3 = new TestObserver<>();
  replayed.subscribe(observer3);
  observer3.assertValues("initB");
}
 

@Test
public void eventOutOfLifecycle() {
    PublishSubject<String> stream = PublishSubject.create();
    PublishSubject<String> lifecycle = PublishSubject.create();

    TestObserver<String> testObserver = stream
        .compose(RxLifecycle.<String, String>bind(lifecycle, CORRESPONDING_EVENTS))
        .test();

    // Event is out of lifecycle, but this just results in completing the stream
    lifecycle.onNext("destroy");
    stream.onNext("1");

    testObserver.assertNoValues();
    testObserver.assertComplete();
}
 

@Test
public void subscribeCancelRace() {
    for (int i = 0; i < 500; i++) {
        final TestObserver<Integer> ts = new TestObserver<Integer>();

        final ReplayRelay<Integer> rp = ReplayRelay.create();

        Runnable r1 = new Runnable() {
            @Override
            public void run() {
                rp.subscribe(ts);
            }
        };

        Runnable r2 = new Runnable() {
            @Override
            public void run() {
                ts.dispose();
            }
        };

        TestHelper.race(r1, r2, Schedulers.single());
    }
}
 

private void testBindUntilEvent(LifecycleProvider<FragmentEvent> provider) {
    Fragment fragment = (Fragment) provider;
    startFragment(fragment);

    TestObserver<Object> testObserver = observable.compose(provider.bindUntilEvent(STOP)).test();

    fragment.onAttach(null);
    testObserver.assertNotComplete();
    fragment.onCreate(null);
    testObserver.assertNotComplete();
    fragment.onViewCreated(null, null);
    testObserver.assertNotComplete();
    fragment.onStart();
    testObserver.assertNotComplete();
    fragment.onResume();
    testObserver.assertNotComplete();
    fragment.onPause();
    testObserver.assertNotComplete();
    fragment.onStop();
    testObserver.assertComplete();
}
 

@Test
public void startModelAndEffects() {
  RxMobiusLoop<Integer, String, Boolean> loop =
      new RxMobiusLoop<>(builder, "StartModel", ImmutableSet.of(true, false));
  final TestObserver<String> testObserver = Observable.just(1).compose(loop).test();

  testObserver.awaitCount(2);
  testObserver.assertValues("StartModel", "StartModel1");
  testObserver.assertNoErrors();
  assertEquals(2, connection.valueCount());
  connection.assertValuesInAnyOrder(true, false);
}
 

@Test public void initialValueToNewSubscriber() {
  PublishSubject<String> subject = PublishSubject.create();
  Observable<String> observable = subject.compose(ReplayingShare.<String>instance());

  TestObserver<String> observer1 = new TestObserver<>();
  observable.subscribe(observer1);
  observer1.assertNoValues();

  subject.onNext("Foo");
  observer1.assertValues("Foo");

  TestObserver<String> observer2 = new TestObserver<>();
  observable.subscribe(observer2);
  observer2.assertValues("Foo");
}
 

@Test public void noInitialValue() {
  PublishSubject<String> subject = PublishSubject.create();
  Observable<String> observable = subject.compose(ReplayingShare.<String>instance());

  TestObserver<String> observer = new TestObserver<>();
  observable.subscribe(observer);
  observer.assertNoValues();
}
 

@Test
public void rx_ListNameOfEachCountry() {
    List<String> expectedResult = CountriesTestProvider.namesOfCountries();
    TestObserver<String> testObserver = countriesService
            .listNameOfEachCountry(allCountries)
            .test();
    testObserver.assertValueSequence(expectedResult);
    testObserver.assertNoErrors();
}
 

@Test public void refCountToUpstream() {
  PublishSubject<String> subject = PublishSubject.create();

  final AtomicInteger count = new AtomicInteger();
  Observable<String> observable = subject //
      .doOnSubscribe(new Consumer<Disposable>() {
        @Override public void accept(Disposable disposable) throws Exception {
          count.incrementAndGet();
        }
      }) //
      .doOnDispose(new Action() {
        @Override public void run() throws Exception {
          count.decrementAndGet();
        }
      }) //
      .compose(ReplayingShare.<String>instance());

  Disposable disposable1 = observable.subscribeWith(new TestObserver<String>());
  assertEquals(1, count.get());

  Disposable disposable2 = observable.subscribeWith(new TestObserver<String>());
  assertEquals(1, count.get());

  Disposable disposable3 = observable.subscribeWith(new TestObserver<String>());
  assertEquals(1, count.get());

  disposable1.dispose();
  assertEquals(1, count.get());

  disposable3.dispose();
  assertEquals(1, count.get());

  disposable2.dispose();
  assertEquals(0, count.get());
}
 

@Test
public void noEvent() {
    TestObserver<String> testObserver = maybe
        .compose(RxLifecycle.<String, String>bind(lifecycle))
        .test();

    stream.onNext("1");
    testObserver.assertValue("1");
    testObserver.assertComplete();
}
 

@Test
public void openAndCloseEvent() {
    TestObserver<Void> testObserver = completable
        .compose(RxLifecycle.bind(lifecycle, CORRESPONDING_EVENTS))
        .test();

    lifecycle.onNext("create");
    lifecycle.onNext("destroy");
    subject.onComplete();
    testObserver.assertError(CancellationException.class);
}
 

@Test public void unsubscribeBeforeSubscribePreventsCacheEmission() {
  PublishSubject<String> upstream = PublishSubject.create();
  Observable<String> replayed = upstream.compose(ReplayingShare.<String>instance());
  replayed.subscribe();
  upstream.onNext("something to cache");

  TestObserver<String> testObserver = new TestObserver<>();
  testObserver.dispose();
  replayed.subscribe(testObserver);
  testObserver.assertNoValues();
}
 

@Test
public void oneStartEvent() {
    TestObserver<String> testObserver = maybe
        .compose(RxLifecycle.<String, String>bind(lifecycle, CORRESPONDING_EVENTS))
        .test();

    lifecycle.onNext("create");
    subject.onNext("1");
    testObserver.assertValue("1");
    testObserver.assertComplete();
}
 

@Test
public void timeoutEmpty() {
    given(timeLimiter.getTimeLimiterConfig())
        .willReturn(toConfig(Duration.ZERO));
    TestObserver<?> observer = Observable.empty()
        .delay(1, TimeUnit.MINUTES)
        .compose(TimeLimiterTransformer.of(timeLimiter))
        .test();

    testScheduler.advanceTimeBy(1, TimeUnit.MINUTES);

    observer.assertError(TimeoutException.class);
    then(timeLimiter).should()
        .onError(any(TimeoutException.class));
}
 

@Test
public void twoEvents() {
    TestObserver<String> testObserver = maybe
        .compose(RxLifecycle.<String, String>bindUntilEvent(lifecycle, "stop"))
        .test();

    lifecycle.onNext("keep going");
    lifecycle.onNext("stop");

    subject.onNext("1");
    testObserver.assertNoValues();
    testObserver.assertComplete();
}
 

@Test
public void twoOpenEvents() {
    TestObserver<String> testObserver = maybe
        .compose(RxLifecycle.<String, String>bind(lifecycle, CORRESPONDING_EVENTS))
        .test();

    lifecycle.onNext("create");
    lifecycle.onNext("start");
    subject.onNext("1");
    testObserver.assertValue("1");
    testObserver.assertComplete();
}