45c826a218
Introduces a materializer started through an extension and then an implicit conversion for Scala turning an implicitly available ActorSystem into a materializer. The Java APIs has been ammended with run-methods accepting an ActorSystem.
65 lines
2.2 KiB
Java
65 lines
2.2 KiB
Java
/*
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* Copyright (C) 2019 Lightbend Inc. <https://www.lightbend.com>
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*/
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package akka.stream.javadsl;
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import akka.NotUsed;
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import akka.japi.Pair;
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import akka.stream.StreamTest;
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import akka.testkit.AkkaJUnitActorSystemResource;
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import akka.testkit.AkkaSpec;
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import org.junit.ClassRule;
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import org.junit.Test;
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import java.util.List;
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import java.util.concurrent.CompletionStage;
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import java.util.concurrent.TimeUnit;
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import static akka.NotUsed.notUsed;
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import static org.junit.Assert.assertEquals;
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public class FlowWithContextTest extends StreamTest {
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public FlowWithContextTest() {
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super(actorSystemResource);
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}
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@ClassRule
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public static AkkaJUnitActorSystemResource actorSystemResource =
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new AkkaJUnitActorSystemResource("FlowWithContextTest", AkkaSpec.testConf());
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@Test
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public void simpleCaseHappyPath() throws Exception {
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final FlowWithContext<Integer, String, Integer, String, NotUsed> flow =
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FlowWithContext.create();
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final CompletionStage<List<Pair<Integer, String>>> result =
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Source.single(new Pair<>(1, "context"))
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.via(flow.map(n -> n + 1).mapContext(ctx -> ctx + "-mapped"))
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.runWith(Sink.seq(), system);
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final List<Pair<Integer, String>> pairs = result.toCompletableFuture().get(3, TimeUnit.SECONDS);
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assertEquals(1, pairs.size());
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assertEquals(Integer.valueOf(2), pairs.get(0).first());
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assertEquals("context-mapped", pairs.get(0).second());
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}
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@Test
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public void mustAllowComposingFlows() throws Exception {
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final FlowWithContext<Integer, NotUsed, Integer, NotUsed, NotUsed> flow1 =
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FlowWithContext.create();
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final FlowWithContext<Integer, NotUsed, String, NotUsed, NotUsed> flow2 =
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FlowWithContext.<Integer, NotUsed>create().map(Object::toString);
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final FlowWithContext<Integer, NotUsed, String, NotUsed, NotUsed> flow3 = flow1.via(flow2);
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final CompletionStage<List<Pair<String, NotUsed>>> result =
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Source.single(new Pair<>(1, notUsed())).via(flow3.asFlow()).runWith(Sink.seq(), system);
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List<Pair<String, NotUsed>> pairs = result.toCompletableFuture().get(3, TimeUnit.SECONDS);
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assertEquals(1, pairs.size());
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assertEquals("1", pairs.get(0).first());
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assertEquals(notUsed(), pairs.get(0).second());
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}
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}
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