@Test
public void fromArityArgs1() {
Observable<String> items = Observable.just("one");
assertEquals((Long) 1L, items.count().toBlocking().single());
assertEquals("one", items.takeLast(1).toBlocking().single());
}
@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));
}
@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();
}
@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();
}