### Question:
ActorManager { Mono<byte[]> invokeMethod(ActorId actorId, String methodName, byte[] request) { return invokeMethod(actorId, null, methodName, request); } ActorManager(ActorRuntimeContext runtimeContext);   }### Answer:
@Test(expected = IllegalArgumentException.class) public void invokeBeforeActivate() throws Exception { ActorId actorId = newActorId(); String message = "something"; this.manager.invokeMethod(actorId, "say", message.getBytes()).block(); }