code: package io.ray.test;
  
  import io.ray.api.ActorHandle;
  import io.ray.api.ObjectRef;
  import io.ray.api.Ray;
  import org.testng.Assert;
  import org.testng.annotations.Test;
  
  @Test
  public class GetCurrentActorHandleTest extends BaseTest {
  
    private static class Echo {
  
      public Echo() {}
  
      public ObjectRef<String> echo(String str) {
        ActorHandle<Echo> self = Ray.getRuntimeContext().getCurrentActorHandle();
        return self.task(Echo::echo2, str).remote();
      }
  
      public String echo2(String str) {
        return str;
      }
    }
  
    @Test
    public void testGetCurrentActorHandle() {
      ActorHandle<Echo> echo1 = Ray.actor(Echo::new).remote();
      ObjectRef<String> obj = echo1.task(Echo::echo, "hello").remote().get();
      Assert.assertEquals("hello", obj.get());
    }
  }
  