RPAction rpAction = new RPAction();
rpAction.put("target", "#" + player.getID().getObjectID());
rpAction.put("mode", "");
rpAction.put("stat", "hp");
rpAction.put("value", "");
assertTrue(player.events().isEmpty());
action.perform(player, rpAction);
assertFalse(player.events().isEmpty());
assertEquals("Please issue a numeric value instead of ''", player.events().get(0).get("text"));
}