@Test
public void testDebounceNeverEmits() {
Observable<String> source =
Observable.create(
new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
// all should be skipped since they are happening faster than the 200ms timeout
publishNext(observer, 100, "a"); // Should be skipped
publishNext(observer, 200, "b"); // Should be skipped
publishNext(observer, 300, "c"); // Should be skipped
publishNext(observer, 400, "d"); // Should be skipped
publishNext(observer, 500, "e"); // Should be skipped
publishNext(observer, 600, "f"); // Should be skipped
publishNext(observer, 700, "g"); // Should be skipped
publishNext(observer, 800, "h"); // Should be skipped
publishCompleted(
observer, 900); // Should be published as soon as the timeout expires.
return Subscriptions.empty();
}
});
Observable<String> sampled =
Observable.create(
OperationDebounce.debounce(source, 200, TimeUnit.MILLISECONDS, scheduler));
sampled.subscribe(observer);
scheduler.advanceTimeTo(0, TimeUnit.MILLISECONDS);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(0)).onNext(anyString());
scheduler.advanceTimeTo(1000, TimeUnit.MILLISECONDS);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testDebounceWithCompleted() {
Observable<String> source =
Observable.create(
new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
publishNext(
observer, 100,
"one"); // Should be skipped since "two" will arrive before the timeout
// expires.
publishNext(
observer, 400,
"two"); // Should be published since "three" will arrive after the timeout
// expires.
publishNext(
observer, 900,
"three"); // Should be skipped since onCompleted will arrive before the
// timeout expires.
publishCompleted(
observer, 1000); // Should be published as soon as the timeout expires.
return Subscriptions.empty();
}
});
Observable<String> sampled =
Observable.create(
OperationDebounce.debounce(source, 400, TimeUnit.MILLISECONDS, scheduler));
sampled.subscribe(observer);
scheduler.advanceTimeTo(0, TimeUnit.MILLISECONDS);
InOrder inOrder = inOrder(observer);
// must go to 800 since it must be 400 after when two is sent, which is at 400
scheduler.advanceTimeTo(800, TimeUnit.MILLISECONDS);
inOrder.verify(observer, times(1)).onNext("two");
scheduler.advanceTimeTo(1000, TimeUnit.MILLISECONDS);
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testDebounceWithError() {
Observable<String> source =
Observable.create(
new OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
Exception error = new TestException();
publishNext(
observer, 100,
"one"); // Should be published since "two" will arrive after the timeout
// expires.
publishNext(
observer, 600,
"two"); // Should be skipped since onError will arrive before the timeout
// expires.
publishError(
observer, 700, error); // Should be published as soon as the timeout expires.
return Subscriptions.empty();
}
});
Observable<String> sampled =
Observable.create(
OperationDebounce.debounce(source, 400, TimeUnit.MILLISECONDS, scheduler));
sampled.subscribe(observer);
scheduler.advanceTimeTo(0, TimeUnit.MILLISECONDS);
InOrder inOrder = inOrder(observer);
// 100 + 400 means it triggers at 500
scheduler.advanceTimeTo(500, TimeUnit.MILLISECONDS);
inOrder.verify(observer).onNext("one");
scheduler.advanceTimeTo(701, TimeUnit.MILLISECONDS);
inOrder.verify(observer).onError(any(TestException.class));
inOrder.verifyNoMoreInteractions();
}