Examples with Completable io.reactivex.rxjava3.core.Completable used on opensource projects

Example 31 with Completable

use of io.reactivex.rxjava3.core.Completable in project RxJava by ReactiveX.

the class ConverterTest method completableConverterThrows.

@Test
public void completableConverterThrows() {
    try {
        Completable.complete().to(new CompletableConverter<Completable>() {

            @Override
            public Completable apply(Completable v) {
                throw new TestException("Forced failure");
            }
        });
        fail("Should have thrown!");
    } catch (TestException ex) {
        assertEquals("Forced failure", ex.getMessage());
    }
}

Example 32 with Completable

use of io.reactivex.rxjava3.core.Completable in project RxJava by ReactiveX.

the class JavadocWording method maybeDocRefersToMaybeTypes.

@Test
public void maybeDocRefersToMaybeTypes() throws Exception {
    List<RxMethod> list = BaseTypeParser.parse(TestHelper.findSource("Maybe"), "Maybe");
    assertFalse(list.isEmpty());
    StringBuilder e = new StringBuilder();
    for (RxMethod m : list) {
        int jdx;
        if (m.javadoc != null) {
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("onNext", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher") && !m.signature.contains("Flowable") && !m.signature.contains("Observable") && !m.signature.contains("ObservableSource")) {
                        e.append("java.lang.RuntimeException: Maybe doc mentions onNext but no Flowable/Observable in signature\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Subscriber", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher") && !m.signature.contains("Flowable") && !m.signature.contains("TestSubscriber")) {
                        e.append("java.lang.RuntimeException: Maybe doc mentions Subscriber but not using Flowable\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" Subscription", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher") && !m.signature.contains("Flowable")) {
                        e.append("java.lang.RuntimeException: Maybe doc mentions Subscription but not using Flowable\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Observer", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("ObservableSource") && !m.signature.contains("Observable") && !m.signature.contains("TestObserver")) {
                        if (idx < 5 || !m.javadoc.substring(idx - 5, idx + 8).equals("MaybeObserver")) {
                            e.append("java.lang.RuntimeException: Maybe doc mentions Observer but not using Observable\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Publisher", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher")) {
                        if (idx == 0 || !m.javadoc.substring(idx - 1, idx + 9).equals("(Publisher")) {
                            e.append("java.lang.RuntimeException: Maybe doc mentions Publisher but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Flowable", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Flowable")) {
                        Pattern p = Pattern.compile("@see\\s+#[A-Za-z0-9 _.,()]*Flowable");
                        if (!p.matcher(m.javadoc).find()) {
                            e.append("java.lang.RuntimeException: Maybe doc mentions Flowable but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Single", jdx);
                if (idx >= 0 && m.javadoc.indexOf("Single#", jdx) != idx) {
                    int j = m.javadoc.indexOf("#toSingle", jdx);
                    int k = m.javadoc.indexOf("{@code Single", jdx);
                    if (!m.signature.contains("Single") && (j + 3 != idx && k + 7 != idx)) {
                        e.append("java.lang.RuntimeException: Maybe doc mentions Single but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("SingleSource", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("SingleSource")) {
                        e.append("java.lang.RuntimeException: Maybe doc mentions SingleSource but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Observable", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Observable")) {
                        Pattern p = Pattern.compile("@see\\s+#[A-Za-z0-9 _.,()]*Observable");
                        if (!p.matcher(m.javadoc).find()) {
                            e.append("java.lang.RuntimeException: Maybe doc mentions Observable but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("ObservableSource", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("ObservableSource")) {
                        e.append("java.lang.RuntimeException: Maybe doc mentions ObservableSource but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            checkAtReturnAndSignatureMatch("Maybe", m, e, "Flowable", "Observable", "Maybe", "Single", "Completable", "Disposable", "Iterable", "Stream", "Future", "CompletionStage");
            aOrAn(e, m, "Maybe");
            missingClosingDD(e, m, "Maybe", "io.reactivex.rxjava3.core");
            backpressureMentionedWithoutAnnotation(e, m, "Maybe");
        }
    }
    if (e.length() != 0) {
        System.out.println(e);
        fail(e.toString());
    }
}

Example 33 with Completable

use of io.reactivex.rxjava3.core.Completable in project RxJava by ReactiveX.

the class JavadocWording method singleDocRefersToSingleTypes.

@Test
public void singleDocRefersToSingleTypes() throws Exception {
    List<RxMethod> list = BaseTypeParser.parse(TestHelper.findSource("Single"), "Single");
    assertFalse(list.isEmpty());
    StringBuilder e = new StringBuilder();
    for (RxMethod m : list) {
        int jdx;
        if (m.javadoc != null) {
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("onNext", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher") && !m.signature.contains("Flowable") && !m.signature.contains("Observable") && !m.signature.contains("ObservableSource")) {
                        e.append("java.lang.RuntimeException: Single doc mentions onNext but no Flowable/Observable in signature\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Subscriber", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher") && !m.signature.contains("Flowable") && !m.signature.contains("TestSubscriber")) {
                        e.append("java.lang.RuntimeException: Single doc mentions Subscriber but not using Flowable\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" Subscription", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Flowable") && !m.signature.contains("Publisher")) {
                        e.append("java.lang.RuntimeException: Single doc mentions Subscription but not using Flowable\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Observer", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("ObservableSource") && !m.signature.contains("Observable") && !m.signature.contains("TestObserver")) {
                        if (idx < 6 || !m.javadoc.substring(idx - 6, idx + 8).equals("SingleObserver")) {
                            e.append("java.lang.RuntimeException: Single doc mentions Observer but not using Observable\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Publisher", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher")) {
                        if (idx == 0 || !m.javadoc.substring(idx - 1, idx + 9).equals("(Publisher")) {
                            e.append("java.lang.RuntimeException: Single doc mentions Publisher but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" Flowable", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Flowable")) {
                        e.append("java.lang.RuntimeException: Single doc mentions Flowable but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" Maybe", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Maybe")) {
                        e.append("java.lang.RuntimeException: Single doc mentions Maybe but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" MaybeSource", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("MaybeSource")) {
                        e.append("java.lang.RuntimeException: Single doc mentions SingleSource but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Maybe.method(Maybe.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" Observable", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Observable")) {
                        e.append("java.lang.RuntimeException: Single doc mentions Observable but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" ObservableSource", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("ObservableSource")) {
                        e.append("java.lang.RuntimeException: Single doc mentions ObservableSource but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Single.method(Single.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            checkAtReturnAndSignatureMatch("Single", m, e, "Flowable", "Observable", "Maybe", "Single", "Completable", "Disposable", "Iterable", "Stream", "Future", "CompletionStage");
            aOrAn(e, m, "Single");
            missingClosingDD(e, m, "Single", "io.reactivex.rxjava3.core");
            backpressureMentionedWithoutAnnotation(e, m, "Single");
        }
    }
    if (e.length() != 0) {
        System.out.println(e);
        fail(e.toString());
    }
}

Example 34 with Completable

use of io.reactivex.rxjava3.core.Completable in project RxJava by ReactiveX.

the class JavadocWording method completableDocRefersToCompletableTypes.

@Test
public void completableDocRefersToCompletableTypes() throws Exception {
    List<RxMethod> list = BaseTypeParser.parse(TestHelper.findSource("Completable"), "Completable");
    assertFalse(list.isEmpty());
    StringBuilder e = new StringBuilder();
    for (RxMethod m : list) {
        int jdx;
        if (m.javadoc != null) {
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("onNext", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher") && !m.signature.contains("Flowable") && !m.signature.contains("Observable") && !m.signature.contains("ObservableSource")) {
                        e.append("java.lang.RuntimeException: Completable doc mentions onNext but no Flowable/Observable in signature\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Subscriber", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher") && !m.signature.contains("Flowable") && !m.signature.contains("TestSubscriber")) {
                        e.append("java.lang.RuntimeException: Completable doc mentions Subscriber but not using Flowable\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" Subscription", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Flowable") && !m.signature.contains("Publisher")) {
                        e.append("java.lang.RuntimeException: Completable doc mentions Subscription but not using Flowable\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Observer", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("ObservableSource") && !m.signature.contains("Observable") && !m.signature.contains("TestObserver")) {
                        if (idx < 11 || !m.javadoc.substring(idx - 11, idx + 8).equals("CompletableObserver")) {
                            e.append("java.lang.RuntimeException: Completable doc mentions Observer but not using Observable\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Publisher", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Publisher")) {
                        if (idx == 0 || !m.javadoc.substring(idx - 1, idx + 9).equals("(Publisher")) {
                            e.append("java.lang.RuntimeException: Completable doc mentions Publisher but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Flowable", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Flowable")) {
                        Pattern p = Pattern.compile("@see\\s+#[A-Za-z0-9 _.,()]*Flowable");
                        if (!p.matcher(m.javadoc).find()) {
                            e.append("java.lang.RuntimeException: Completable doc mentions Flowable but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("Single", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Single")) {
                        Pattern p = Pattern.compile("@see\\s+#[A-Za-z0-9 _.,()]*Single");
                        if (!p.matcher(m.javadoc).find()) {
                            e.append("java.lang.RuntimeException: Completable doc mentions Single but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("SingleSource", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("SingleSource")) {
                        Pattern p = Pattern.compile("@see\\s+#[A-Za-z0-9 _.,()]*SingleSource");
                        if (!p.matcher(m.javadoc).find()) {
                            e.append("java.lang.RuntimeException: Completable doc mentions SingleSource but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf(" Observable", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("Observable")) {
                        Pattern p = Pattern.compile("@see\\s+#[A-Za-z0-9 _.,()]*Observable");
                        if (!p.matcher(m.javadoc).find()) {
                            e.append("java.lang.RuntimeException: Completable doc mentions Observable but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            jdx = 0;
            for (; ; ) {
                int idx = m.javadoc.indexOf("ObservableSource", jdx);
                if (idx >= 0) {
                    if (!m.signature.contains("ObservableSource")) {
                        Pattern p = Pattern.compile("@see\\s+#[A-Za-z0-9 _.,()]*ObservableSource");
                        if (!p.matcher(m.javadoc).find()) {
                            e.append("java.lang.RuntimeException: Completable doc mentions ObservableSource but not in the signature\r\n at io.reactivex.rxjava3.core.").append("Completable.method(Completable.java:").append(m.javadocLine + lineNumber(m.javadoc, idx) - 1).append(")\r\n\r\n");
                        }
                    }
                    jdx = idx + 6;
                } else {
                    break;
                }
            }
            checkAtReturnAndSignatureMatch("Completable", m, e, "Flowable", "Observable", "Maybe", "Single", "Completable", "Disposable", "Iterable", "Stream", "Future", "CompletionStage");
            aOrAn(e, m, "Completable");
            missingClosingDD(e, m, "Completable", "io.reactivex.rxjava3.core");
            backpressureMentionedWithoutAnnotation(e, m, "Completable");
        }
    }
    if (e.length() != 0) {
        System.out.println(e);
        fail(e.toString());
    }
}

Example 35 with Completable

use of io.reactivex.rxjava3.core.Completable in project RxJava by ReactiveX.

the class CompletableFromSupplierTest method shouldNotDeliverResultIfSubscriberUnsubscribedBeforeEmission.

@SuppressWarnings("unchecked")
@Test
public void shouldNotDeliverResultIfSubscriberUnsubscribedBeforeEmission() throws Throwable {
    Supplier<String> func = mock(Supplier.class);
    final CountDownLatch funcLatch = new CountDownLatch(1);
    final CountDownLatch observerLatch = new CountDownLatch(1);
    when(func.get()).thenAnswer(new Answer<String>() {

        @Override
        public String answer(InvocationOnMock invocation) throws Throwable {
            observerLatch.countDown();
            try {
                funcLatch.await();
            } catch (InterruptedException e) {
                // It's okay, unsubscription causes Thread interruption
                // Restoring interruption status of the Thread
                Thread.currentThread().interrupt();
            }
            return "should_not_be_delivered";
        }
    });
    Completable fromSupplierObservable = Completable.fromSupplier(func);
    Observer<Object> observer = TestHelper.mockObserver();
    TestObserver<String> outer = new TestObserver<>(observer);
    fromSupplierObservable.subscribeOn(Schedulers.computation()).subscribe(outer);
    // Wait until func will be invoked
    observerLatch.await();
    // Unsubscribing before emission
    outer.dispose();
    // Emitting result
    funcLatch.countDown();
    // func must be invoked
    verify(func).get();
    // Observer must not be notified at all
    verify(observer).onSubscribe(any(Disposable.class));
    verifyNoMoreInteractions(observer);
}