/**
* Occasionally zip may be invoked with 0 observables. Test that we don't block indefinitely
* instead of immediately invoking zip with 0 argument.
*
* <p>We now expect an NoSuchElementException since last() requires at least one value and nothing
* will be emitted.
*/
@Test(expected = NoSuchElementException.class)
public void nonBlockingObservable() {
final Object invoked = new Object();
Collection<Observable<Object>> observables = Collections.emptyList();
Observable<Object> result =
Observable.zip(
observables,
args -> {
System.out.println("received: " + args);
assertEquals("No argument should have been passed", 0, args.length);
return invoked;
});
assertSame(invoked, result.toBlocking().last());
}
