Java Code Examples for io.reactivex.subscribers.TestSubscriber#assertError()

@SuppressWarnings("unchecked")
@Test
public void testRetryWhenSpecificExceptionFails() {
    Exception ex = new IllegalArgumentException("boo");
    TestSubscriber<Integer> ts = TestSubscriber.create();
    TestScheduler scheduler = new TestScheduler();
    Flowable.just(1, 2)
            // force error after 3 emissions
            .concatWith(Flowable.<Integer>error(ex))
            // retry with backoff
            .retryWhen(RetryWhen.maxRetries(2).action(log).exponentialBackoff(1, TimeUnit.MINUTES)
                    .scheduler(scheduler).failWhenInstanceOf(IllegalArgumentException.class).build())
            // go
            .subscribe(ts);
    ts.assertValues(1, 2);
    ts.assertError(ex);
}
 

@Test
public void shouldCallOnError() {
    Throwable throwable = new IllegalStateException("Test exception");
    //noinspection unchecked
    PreparedOperation<String, String, String> preparedOperation = mock(PreparedOperation.class);
    when(preparedOperation.executeAsBlocking()).thenThrow(throwable);

    TestSubscriber<String> testSubscriber = TestSubscriber.create();

    Flowable
            .create(new FlowableOnSubscribeExecuteAsBlocking<String, String, String>(preparedOperation), BackpressureStrategy.MISSING)
            .subscribe(testSubscriber);

    testSubscriber.assertError(throwable);
    testSubscriber.assertNoValues();
    testSubscriber.assertNotComplete();
}
 

@Test
public void shouldCallOnError() {
    Throwable throwable = new IllegalStateException("Test exception");
    //noinspection unchecked
    PreparedOperation<String, Optional<String>, String> preparedOperation = mock(PreparedOperation.class);
    when(preparedOperation.executeAsBlocking()).thenThrow(throwable);

    TestSubscriber<Optional<String>> testSubscriber = TestSubscriber.create();

    Flowable
            .create(new FlowableOnSubscribeExecuteAsBlockingOptional<String, String>(preparedOperation), MISSING)
            .subscribe(testSubscriber);

    testSubscriber.assertError(throwable);
    testSubscriber.assertNoValues();
    testSubscriber.assertNotComplete();
}
 

@Test
public void serverErrorSignalsUpstreamCancellationBidi() {
    serverRule.getServiceRegistry().addService(new ExplodeAfterFiveService());
    RxNumbersGrpc.RxNumbersStub stub = RxNumbersGrpc.newRxStub(serverRule.getChannel());

    AtomicBoolean upstreamCancel = new AtomicBoolean(false);

    TestSubscriber<NumberProto.Number> subscriber = Flowable.range(0, Integer.MAX_VALUE)
            .map(this::protoNum)
            .doOnCancel(() -> upstreamCancel.set(true))
            .compose(stub::twoWayPressure)
            .doOnNext(i -> System.out.println(i.getNumber(0)))
            .test();

    subscriber.awaitTerminalEvent(3, TimeUnit.SECONDS);
    subscriber.assertError(StatusRuntimeException.class);
    assertThat(upstreamCancel.get()).isTrue();
}
 

@Test
public void oneToMany() {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);
    Flowable<HelloResponse> resp = Single.just(HelloRequest.getDefaultInstance()).as(stub::sayHelloRespStream);
    TestSubscriber<HelloResponse> test = resp
            .doOnNext(System.out::println)
            .doOnError(throwable -> System.out.println(throwable.getMessage()))
            .doOnComplete(() -> System.out.println("Completed"))
            .doOnCancel(() -> System.out.println("Client canceled"))
            .test();

    test.awaitTerminalEvent(3, TimeUnit.SECONDS);
    test.assertError(t -> t instanceof StatusRuntimeException);
    test.assertError(t -> ((StatusRuntimeException)t).getStatus().getCode() == Status.Code.INTERNAL);
}
 

@Test public void whenMissingStrategyUsed_thenException() {
    Observable observable = Observable.range(1, 100000);
    TestSubscriber subscriber = observable.toFlowable(BackpressureStrategy.MISSING).observeOn(Schedulers.computation()).test();

    subscriber.awaitTerminalEvent();
    subscriber.assertError(MissingBackpressureException.class);
}
 

@Test
public void shouldWrapExceptionIntoStorIOExceptionForFlowable() {
    final StorIOSQLite storIOSQLite = mock(StorIOSQLite.class);

    when(storIOSQLite.observeChanges(any(BackpressureStrategy.class))).thenReturn(Flowable.<Changes>empty());

    //noinspection unchecked
    final GetResolver<Cursor> getResolver = mock(GetResolver.class);

    when(getResolver.performGet(eq(storIOSQLite), any(Query.class)))
            .thenThrow(new IllegalStateException("test exception"));

    final TestSubscriber<Cursor> testSubscriber = new TestSubscriber<Cursor>();

    new PreparedGetCursor.Builder(storIOSQLite)
            .withQuery(Query.builder().table("test_table").observesTags("test_tag").build())
            .withGetResolver(getResolver)
            .prepare()
            .asRxFlowable(LATEST)
            .subscribe(testSubscriber);

    testSubscriber.awaitTerminalEvent(60, SECONDS);
    testSubscriber.assertError(StorIOException.class);

    StorIOException storIOException = (StorIOException) testSubscriber.errors().get(0);
    IllegalStateException cause = (IllegalStateException) storIOException.getCause();
    assertThat(cause).hasMessage("test exception");

    testSubscriber.dispose();
}
 

@Test
public void testErrorDeferred() {
    Single<Integer> s = Single.fromCallable(() -> {
        throw new RuntimeException("boo");
    });
    TestSubscriber<Integer> ts = new FlowableSingleDeferUntilRequest<Integer>(s) //
            .test();
    ts.assertError(RuntimeException.class);
    ts.assertNoValues();
}
 

@Test
public void statusRuntimeExceptionTriggersHandlerFuseable() {
    CallStreamObserver delegate = mock(CallStreamObserver.class);
    final AtomicBoolean called = new AtomicBoolean(false);

    AbstractStreamObserverAndPublisher observer = new TestStreamObserverAndPublisherWithFusion(new ArrayBlockingQueue(1), null, new Runnable() {
        @Override
        public void run() {
            called.set(true);
        }
    });

    observer.onSubscribe(delegate);

    TestSubscriber test = Flowable.fromPublisher(observer)
                                  .observeOn(Schedulers.trampoline())
                                  .test();

    StatusRuntimeException exception = Status.CANCELLED.asRuntimeException();
    observer.onError(exception);

    test.awaitTerminalEvent();
    test.assertError(exception);

    assertThat(called.get()).isTrue();
    assertThat(observer.outputFused).isTrue();
}
 

@Test
public void testGetHelloWorldAsyncObservable404() throws Exception {
    String address = "http://localhost:" + PORT + "/rx2/flowable/textAsync404";
    Invocation.Builder b = ClientBuilder.newClient().register(new FlowableRxInvokerProvider())
        .target(address).request();

    final TestSubscriber<String> subscriber = new TestSubscriber<>();
    b.rx(FlowableRxInvoker.class)
        .get(String.class)
        .subscribe(subscriber);
    
    subscriber.await(1, TimeUnit.SECONDS);
    subscriber.assertError(NotFoundException.class);
}
 

@Test
public void manyToMany() {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);
    Flowable<HelloRequest> req = Flowable.just(HelloRequest.getDefaultInstance());
    Flowable<HelloResponse> resp = req.compose(stub::sayHelloBothStream);
    TestSubscriber<HelloResponse> test = resp.test();

    test.awaitTerminalEvent(3, TimeUnit.SECONDS);
    test.assertError(t -> t instanceof StatusRuntimeException);
    test.assertError(t -> ((StatusRuntimeException)t).getStatus().getCode() == Status.Code.INTERNAL);
}
 

@Test
public void testInvalidRequest() {
    Publisher<Integer> publisher = Uni.createFrom().item(1).convert().toPublisher();
    assertThat(publisher).isNotNull();
    TestSubscriber<Integer> test = Flowable.fromPublisher(publisher).test(0);
    test.assertSubscribed();
    test.request(0);
    test.assertError(IllegalArgumentException.class);
    test.assertTerminated();
}
 

@Test
public void createWithError() {
    Exception failure = new Exception("Boom");
    PublisherStage<Object> boom = factory.create(null, () -> failure);
    TestSubscriber<Object> test = boom.get().test();
    test.assertError(failure);
}
 

@Test
public void testSubscriberWithException() {
    Flowable<Integer> flowable = Flowable.create(source -> {
        source.onNext(1);
        source.onError(new RuntimeException());
    }, BackpressureStrategy.LATEST);

    TestSubscriber<Integer> ts = flowable.test();

    ts.assertSubscribed();
    ts.assertError(RuntimeException.class);
}
 

@Test
public void otherError() {
    given(timeLimiter.getTimeLimiterConfig())
        .willReturn(toConfig(Duration.ZERO));
    TestSubscriber<Object> subscriber = Flowable.error(new RuntimeException())
        .compose(TimeLimiterTransformer.of(timeLimiter))
        .test();

    testScheduler.advanceTimeBy(1, TimeUnit.MINUTES);

    subscriber.assertError(RuntimeException.class);
    then(timeLimiter).should()
        .onError(any(RuntimeException.class));
}
 

@Test
public void getAllImpressions_readError_notifiesError() {
  when(storageClient.read(any(CampaignImpressionsParser.class)))
      .thenReturn(Maybe.error(new IOException()));

  TestSubscriber<CampaignImpressionList> subscriber =
      impressionStorageClient.getAllImpressions().toFlowable().test();

  subscriber.assertError(IOException.class);
}
 

@Test
public void shouldWrapExceptionIntoStorIOExceptionFlowable() {
    final Stub stub = Stub.newInstanceApplyNotEmptyAffectedTablesAndTags();

    IllegalStateException testException = new IllegalStateException("test exception");
    doThrow(testException).when(stub.lowLevel).executeSQL(stub.rawQuery);

    final TestSubscriber<Object> testSubscriber = new TestSubscriber<Object>();

    stub.storIOSQLite
            .executeSQL()
            .withQuery(stub.rawQuery)
            .prepare()
            .asRxFlowable(MISSING)
            .subscribe(testSubscriber);

    testSubscriber.awaitTerminalEvent();
    testSubscriber.assertNoValues();
    testSubscriber.assertError(StorIOException.class);

    //noinspection ThrowableResultOfMethodCallIgnored
    StorIOException expected = (StorIOException) testSubscriber.errors().get(0);

    IllegalStateException cause = (IllegalStateException) expected.getCause();
    assertThat(cause).hasMessage("test exception");

    verify(stub.storIOSQLite).executeSQL();
    verify(stub.storIOSQLite).defaultRxScheduler();
    verify(stub.storIOSQLite).lowLevel();
    verify(stub.lowLevel).executeSQL(stub.rawQuery);
    verify(stub.storIOSQLite).interceptors();
    verifyNoMoreInteractions(stub.storIOSQLite, stub.lowLevel);
}
 

@Test
public void shouldWrapExceptionIntoStorIOExceptionForFlowable() {
    final StorIOContentResolver storIOContentResolver = mock(StorIOContentResolver.class);

    Uri testUri = mock(Uri.class);
    when(storIOContentResolver.observeChangesOfUri(eq(testUri), eq(BackpressureStrategy.MISSING)))
            .thenReturn(Flowable.<Changes>empty());

    //noinspection unchecked
    final GetResolver<Integer> getResolver = mock(GetResolver.class);

    when(getResolver.performGet(eq(storIOContentResolver), any(Query.class)))
            .thenThrow(new IllegalStateException("test exception"));

    final TestSubscriber<Integer> testSubscriber = new TestSubscriber<Integer>();

    new PreparedGetNumberOfResults.Builder(storIOContentResolver)
            .withQuery(Query.builder().uri(testUri).build())
            .withGetResolver(getResolver)
            .prepare()
            .asRxFlowable(BackpressureStrategy.MISSING)
            .subscribe(testSubscriber);

    testSubscriber.awaitTerminalEvent(60, SECONDS);
    testSubscriber.assertError(StorIOException.class);

    assertThat(testSubscriber.errors()).hasSize(1);
    StorIOException storIOException = (StorIOException) testSubscriber.errors().get(0);
    IllegalStateException cause = (IllegalStateException) storIOException.getCause();
    assertThat(cause).hasMessage("test exception");

    testSubscriber.dispose();
}
 

@Test
public void cursorMustBeClosedInCaseOfExceptionForFlowable() {
    final StorIOSQLite storIOSQLite = mock(StorIOSQLite.class);

    when(storIOSQLite.observeChanges(any(BackpressureStrategy.class))).thenReturn(Flowable.<Changes>empty());

    //noinspection unchecked
    final GetResolver<Object> getResolver = mock(GetResolver.class);

    final Cursor cursor = mock(Cursor.class);

    when(cursor.getCount()).thenReturn(10);

    when(cursor.moveToNext()).thenReturn(true);

    when(getResolver.performGet(eq(storIOSQLite), any(Query.class)))
            .thenReturn(cursor);

    when(getResolver.mapFromCursor(storIOSQLite, cursor))
            .thenThrow(new IllegalStateException("test exception"));

    PreparedGetObject<Object> preparedGetObject =
            new PreparedGetObject<Object>(
                    storIOSQLite,
                    Object.class,
                    Query.builder().table("test_table").observesTags("test_tag").build(),
                    getResolver
            );

    final TestSubscriber<Object> testSubscriber = new TestSubscriber<Object>();

    preparedGetObject
            .asRxFlowable(LATEST)
            .subscribe(testSubscriber);

    testSubscriber.awaitTerminalEvent();

    testSubscriber.assertNoValues();
    testSubscriber.assertError(StorIOException.class);

    StorIOException storIOException = (StorIOException) testSubscriber.errors().get(0);

    IllegalStateException cause = (IllegalStateException) storIOException.getCause();
    assertThat(cause).hasMessage("test exception");

    // Cursor must be closed in case of exception
    verify(cursor).close();

    verify(storIOSQLite).observeChanges(LATEST);
    verify(getResolver).performGet(eq(storIOSQLite), any(Query.class));
    verify(getResolver).mapFromCursor(storIOSQLite, cursor);
    verify(cursor).getCount();
    verify(cursor).moveToNext();
    verify(storIOSQLite).defaultRxScheduler();
    verify(storIOSQLite).interceptors();

    verifyNoMoreInteractions(storIOSQLite, getResolver, cursor);
}
 

@Test
public void shouldFinishTransactionIfExceptionHasOccurredFlowable() {
    final StorIOSQLite storIOSQLite = mock(StorIOSQLite.class);
    final StorIOSQLite.LowLevel lowLevel = mock(StorIOSQLite.LowLevel.class);

    when(storIOSQLite.lowLevel()).thenReturn(lowLevel);

    //noinspection unchecked
    final PutResolver<Object> putResolver = mock(PutResolver.class);

    when(putResolver.performPut(same(storIOSQLite), any()))
            .thenThrow(new IllegalStateException("test exception"));

    final List<Object> objects = singletonList(new Object());

    final TestSubscriber<PutResults<Object>> testSubscriber = new TestSubscriber<PutResults<Object>>();

    new PreparedPutCollectionOfObjects.Builder<Object>(storIOSQLite, objects)
            .useTransaction(true)
            .withPutResolver(putResolver)
            .prepare()
            .asRxFlowable(MISSING)
            .subscribe(testSubscriber);

    testSubscriber.awaitTerminalEvent();
    testSubscriber.assertNoValues();
    testSubscriber.assertError(StorIOException.class);

    //noinspection ThrowableResultOfMethodCallIgnored
    StorIOException expected = (StorIOException) testSubscriber.errors().get(0);
    IllegalStateException cause = (IllegalStateException) expected.getCause();
    assertThat(cause).hasMessage("test exception");

    verify(lowLevel).beginTransaction();
    verify(lowLevel, never()).setTransactionSuccessful();
    verify(lowLevel).endTransaction();

    verify(storIOSQLite).lowLevel();
    verify(storIOSQLite).defaultRxScheduler();
    verify(storIOSQLite).interceptors();
    verify(putResolver).performPut(same(storIOSQLite), any());
    verifyNoMoreInteractions(storIOSQLite, lowLevel, putResolver);
}