93 lines
2.4 KiB
Scala
93 lines
2.4 KiB
Scala
package docs.stream.cookbook
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import akka.stream.ClosedShape
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import akka.stream.scaladsl._
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import akka.stream.testkit._
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import scala.concurrent.duration._
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class RecipeManualTrigger extends RecipeSpec {
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"Recipe for triggering a stream manually" must {
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"work" in {
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val elements = Source(List("1", "2", "3", "4"))
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val pub = TestPublisher.probe[Trigger]()
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val sub = TestSubscriber.manualProbe[Message]()
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val triggerSource = Source.fromPublisher(pub)
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val sink = Sink.fromSubscriber(sub)
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//#manually-triggered-stream
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val graph = RunnableGraph.fromGraph(GraphDSL.create() { implicit builder =>
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import GraphDSL.Implicits._
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val zip = builder.add(Zip[Message, Trigger]())
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elements ~> zip.in0
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triggerSource ~> zip.in1
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zip.out ~> Flow[(Message, Trigger)].map { case (msg, trigger) => msg } ~> sink
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ClosedShape
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})
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//#manually-triggered-stream
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graph.run()
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sub.expectSubscription().request(1000)
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sub.expectNoMsg(100.millis)
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pub.sendNext(())
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sub.expectNext("1")
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sub.expectNoMsg(100.millis)
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pub.sendNext(())
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pub.sendNext(())
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sub.expectNext("2")
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sub.expectNext("3")
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sub.expectNoMsg(100.millis)
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pub.sendNext(())
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sub.expectNext("4")
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sub.expectComplete()
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}
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"work with ZipWith" in {
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val elements = Source(List("1", "2", "3", "4"))
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val pub = TestPublisher.probe[Trigger]()
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val sub = TestSubscriber.manualProbe[Message]()
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val triggerSource = Source.fromPublisher(pub)
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val sink = Sink.fromSubscriber(sub)
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//#manually-triggered-stream-zipwith
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val graph = RunnableGraph.fromGraph(GraphDSL.create() { implicit builder =>
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import GraphDSL.Implicits._
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val zip = builder.add(ZipWith((msg: Message, trigger: Trigger) => msg))
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elements ~> zip.in0
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triggerSource ~> zip.in1
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zip.out ~> sink
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ClosedShape
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})
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//#manually-triggered-stream-zipwith
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graph.run()
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sub.expectSubscription().request(1000)
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sub.expectNoMsg(100.millis)
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pub.sendNext(())
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sub.expectNext("1")
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sub.expectNoMsg(100.millis)
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pub.sendNext(())
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pub.sendNext(())
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sub.expectNext("2")
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sub.expectNext("3")
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sub.expectNoMsg(100.millis)
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pub.sendNext(())
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sub.expectNext("4")
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sub.expectComplete()
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}
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}
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}
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