@Test
public void mustBeAbleToUseSimpleOperators() {
final JavaTestKit probe = new JavaTestKit(system);
final String[] lookup = {"a", "b", "c", "d", "e", "f"};
final java.lang.Iterable<Integer> input = Arrays.asList(0, 1, 2, 3, 4, 5);
final Source<Integer, NotUsed> ints = Source.from(input);
ints.drop(2)
.take(3)
.takeWithin(FiniteDuration.create(10, TimeUnit.SECONDS))
.map(elem -> lookup[elem])
.filter(elem -> !elem.equals("c"))
.grouped(2)
.mapConcat(elem -> elem)
.groupedWithin(100, FiniteDuration.create(50, TimeUnit.MILLISECONDS))
.mapConcat(elem -> elem)
.runFold("", (acc, elem) -> acc + elem, materializer)
.thenAccept(elem -> probe.getRef().tell(elem, ActorRef.noSender()));
probe.expectMsgEquals("de");
}
