### Question:
ActorRuntime { public <T extends AbstractActor> void registerActor(Class<T> clazz) { registerActor(clazz, new DefaultObjectSerializer(), new DefaultObjectSerializer()); } private  ActorRuntime(); private  ActorRuntime(DaprClient daprClient); static ActorRuntime getInstance(); ActorRuntimeConfig getConfig(); byte[] serializeConfig(); void registerActor(Class<T> clazz); void registerActor(Class<T> clazz, ActorFactory<T> actorFactory); void registerActor(
        Class<T> clazz, DaprObjectSerializer objectSerializer, DaprObjectSerializer stateSerializer); void registerActor(
        Class<T> clazz, ActorFactory<T> actorFactory,
        DaprObjectSerializer objectSerializer,
        DaprObjectSerializer stateSerializer); Mono<Void> deactivate(String actorTypeName, String actorId); Mono<byte[]> invoke(String actorTypeName, String actorId, String actorMethodName, byte[] payload); Mono<Void> invokeReminder(String actorTypeName, String actorId, String reminderName, byte[] params); Mono<Void> invokeTimer(String actorTypeName, String actorId, String timerName);  }### Answer:
@Test public void registerActor() throws Exception { this.runtime.registerActor(MyActorImpl.class); Assert.assertTrue(new String(this.runtime.serializeConfig()).contains(ACTOR_NAME)); }