final SpeakerNPC barMaid = (SpeakerNPC) zone.getNPCList().get(0);
assertThat(barMaid.getName(), is("Siandra"));
final Engine engine = barMaid.getEngine();
engine.setCurrentState(ConversationStates.ATTENDING);
Sentence sentence = new SentenceImplementation(new Expression("offer", ExpressionType.VERB));
engine.step(PlayerTestHelper.createPlayer("bob"), sentence);
assertThat(engine.getCurrentState(), is(ConversationStates.ATTENDING));
assertThat("offer text", getReply(barMaid), equalTo("I buy pieces of cheese, pieces of meat, spinaches, pieces of ham, sacks of flour, and porcini."));
final Expression sell = new Expression("sell", ExpressionType.VERB);