Hi, I'm an Akka noob so apologies if this is a dumb question. I'm trying to
make the Testkit work with Java, starting with JUnit testing. Example taken
from documentation, tweaked to make it compile, source included below. When
I run the test using JUnit 4 in Eclipse Luna, I get the stack trace
below. I'm using 2.11-2.3.9 jars. There hasn't been any discussion of
testkit for a couple of years, has everyone given up on Java and moved to
the Scala version? Or am I doing something stupid? (I have non-testkit Akka
systems runnning happily in the same build / run environment).
TIA,
Tom.
akka.actor.ActorInitializationException: You cannot create an instance of
[test.MyActor] explicitly using the constructor (new). You have to use one
of the 'actorOf' factory methods to create a new actor. See the
documentation.
at akka.actor.ActorInitializationException$.apply(Actor.scala:165)
at akka.actor.Actor$class.$init$(Actor.scala:421)
at akka.actor.UntypedActor.<init>(UntypedActor.scala:97)
at test.MyActor.<init>(MyActor.java:12)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at
org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:195)
at
org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:244)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:241)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
package test;
import static org.junit.Assert.*;
import org.junit.Test;
import akka.actor.ActorSystem;
import akka.actor.Props;
import akka.actor.UntypedActor;
import akka.testkit.TestActorRef;
public class MyActor extends UntypedActor {
public void onReceive(Object o) throws Exception {
if (o.equals("say42")) {
getSender().tell(42, getSelf());
} else if (o instanceof Exception) {
throw (Exception) o;
}
}
public boolean testMe() { return true; }
@Test
public void demonstrateTestActorRef() {
final ActorSystem system = ActorSystem.apply();
final Props props = Props.create(MyActor.class);
final TestActorRef<MyActor> ref = TestActorRef.create(system, props,
"testA");
final MyActor actor = ref.underlyingActor();
assertTrue(actor.testMe());
}
}
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