53 lines
1.2 KiB
Scala
53 lines
1.2 KiB
Scala
package docs.stream.cookbook
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import akka.stream.scaladsl.{ Sink, Source }
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import akka.stream.testkit.StreamTestKit
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import akka.stream.testkit.StreamTestKit.{ SubscriberProbe, PublisherProbe }
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import scala.concurrent.duration._
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class RecipeMissedTicks extends RecipeSpec {
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"Recipe for collecting missed ticks" must {
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"work" in {
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type Tick = Unit
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val pub = PublisherProbe[Tick]()
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val sub = SubscriberProbe[Int]()
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val tickStream = Source(pub)
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val sink = Sink(sub)
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//#missed-ticks
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// tickStream is a Source[Tick]
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val missedTicks: Source[Int] =
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tickStream.conflate(seed = (_) => 0)(
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(missedTicks, tick) => missedTicks + 1)
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//#missed-ticks
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missedTicks.to(sink).run()
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val manualSource = new StreamTestKit.AutoPublisher(pub)
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manualSource.sendNext(())
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manualSource.sendNext(())
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manualSource.sendNext(())
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manualSource.sendNext(())
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val subscription = sub.expectSubscription()
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subscription.request(1)
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sub.expectNext(3)
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subscription.request(1)
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sub.expectNoMsg(100.millis)
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manualSource.sendNext(())
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sub.expectNext(0)
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manualSource.sendComplete()
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subscription.request(1)
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sub.expectComplete()
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}
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}
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}
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