public void An_ActorRefFactory_must_throw_suitable_exceptions_for_malformed_actor_names(string name, string expectedExceptionMessageSubstring) { var exception = Assert.Throws<InvalidActorNameException>(() => { Sys.ActorOf(Props.Empty, name); }); Assert.Contains(expectedExceptionMessageSubstring, exception.Message, StringComparison.InvariantCultureIgnoreCase); }