/**
* 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");
}
}
@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));
}
/**
* 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."
*/
@Test
@Ignore("Subscribers can't throw")
public void testErrorThrownWithoutErrorHandlerSynchronous() {
try {
Observable.error(new RuntimeException("failure")).subscribe();
fail("expected exception");
} catch (Throwable e) {
assertEquals("failure", e.getMessage());
}
}
@Test
public void testErrorThrownIssue1685() {
Subject<Object, Object> subject = ReplaySubject.create();
Observable.error(new RuntimeException("oops"))
.materialize()
.delay(1, TimeUnit.SECONDS)
.dematerialize()
.subscribe(subject);
subject.subscribe();
subject.materialize().toBlocking().first();
System.out.println("Done");
}
@Test(expected = NullPointerException.class)
public void testForEachWithNull() {
Observable.error(new Exception("boo"))
//
.forEach(null);
}