@Test
public void countDownTest() {
EventSource<Void> src1 = new EventSource<Void>();
EventSource<Void> src2 = new EventSource<Void>();
EventSource<Void> reset = new EventSource<Void>();
BiFunction<Integer, Void, Tuple2<Integer, Optional<String>>> countdown =
(s, i) -> s == 1 ? t(3, Optional.of("COUNTDOWN REACHED")) : t(s - 1, Optional.empty());
EventStream<String> countdowns =
StateMachine.init(3)
.on(src1)
.transmit(countdown)
.on(src2)
.transmit(countdown)
.on(reset)
.transition((s, i) -> 3)
.toEventStream();
Counter counter = new Counter();
Subscription sub = countdowns.hook(x -> counter.inc()).pin();
src1.push(null);
src2.push(null);
assertEquals(0, counter.get());
src1.push(null);
assertEquals(1, counter.getAndReset());
src2.push(null);
src2.push(null);
reset.push(null);
assertEquals(0, counter.get());
src2.push(null);
assertEquals(0, counter.get());
src1.push(null);
assertEquals(0, counter.get());
src2.push(null);
assertEquals(1, counter.getAndReset());
sub.unsubscribe();
src1.push(null);
src1.push(null);
src1.push(null);
src1.push(null);
src1.push(null);
src1.push(null);
assertEquals(0, counter.get());
}