content: /*
   * Copyright (C) 2018-2025 Lightbend Inc. <https://www.lightbend.com>
   */
  
  package akka.stream.javadsl;
  
  import static org.junit.Assert.assertEquals;
  
  import akka.japi.Pair;
  import akka.stream.StreamTest;
  import akka.stream.ThrottleMode;
  import akka.testkit.AkkaJUnitActorSystemResource;
  import akka.testkit.AkkaSpec;
  import java.time.Duration;
  import java.util.Arrays;
  import java.util.List;
  import java.util.concurrent.TimeUnit;
  import org.junit.ClassRule;
  import org.junit.Test;
  
  public class SourceWithContextThrottleTest extends StreamTest {
  
    public SourceWithContextThrottleTest() {
      super(actorSystemResource);
    }
  
    @ClassRule
    public static AkkaJUnitActorSystemResource actorSystemResource =
        new AkkaJUnitActorSystemResource("ThrottleTest", AkkaSpec.testConf());
  
    @Test
    public void mustBeAbleToUseThrottle() throws Exception {
      List<Pair<Integer, String>> list =
          Arrays.asList(
              new Pair<>(0, "context-a"), new Pair<>(1, "context-b"), new Pair<>(2, "context-c"));
      Pair<Integer, String> result =
          SourceWithContext.fromPairs(Source.from(list))
              .throttle(10, Duration.ofSeconds(1), 10, ThrottleMode.shaping())
              .throttle(10, Duration.ofSeconds(1), 10, ThrottleMode.enforcing())
              .runWith(Sink.head(), system)
              .toCompletableFuture()
              .get(3, TimeUnit.SECONDS);
  
      assertEquals(list.get(0), result);
    }
  }
  