assertEquals("Sorry, I don't sell houses.", getReply(npc));
assertTrue(en.step(player, "buy someunknownthing"));
assertEquals("Sorry, I don't sell someunknownthings.", getReply(npc));
assertTrue(en.step(player, "buy a glass of wine"));
assertEquals("Sorry, I don't sell glasses of wine.", getReply(npc));
assertTrue(en.step(player, "buy a hand full of peace"));
assertEquals("Sorry, I don't sell hand fulls of peace.", getReply(npc));