assertTrue(en.step(player, "mill grain"));
assertEquals("Sorry, I don't produce sheaves of grain.", getReply(npc));
assertTrue(equipWithStackableItem(player, "grain", 10));
assertTrue(en.step(player, "mill two sacks of flour"));
assertEquals("I need you to fetch me 10 #'sheaves of grain' for this job. Do you have it?", getReply(npc));
assertTrue(en.step(player, "yes"));
assertEquals("OK, I will mill 2 sacks of flour for you, but that will take some time. Please come back in 4 minutes.", getReply(npc));