@Test
public void testScanWithRequestOne() {
Observable<Integer> o =
Observable.just(1, 2)
.scan(
0,
new BiFunction<Integer, Integer, Integer>() {
@Override
public Integer apply(Integer t1, Integer t2) {
return t1 + t2;
}
})
.take(1);
TestSubscriber<Integer> subscriber = new TestSubscriber<>();
o.subscribe(subscriber);
subscriber.assertValue(0);
subscriber.assertTerminated();
subscriber.assertNoErrors();
}
@Test
public void testInitialValueEmittedWithProducer() {
Observable<Integer> source = Observable.never();
TestSubscriber<Integer> ts = new TestSubscriber<>();
source
.scan(
0,
new BiFunction<Integer, Integer, Integer>() {
@Override
public Integer apply(Integer t1, Integer t2) {
return t1 + t2;
}
})
.subscribe(ts);
ts.assertNoErrors();
ts.assertNotComplete();
ts.assertValue(0);
}