@Test
    public void demoIsResetted()
    {
        rp.resetDemo();
        assertTrue(rp.getEntities().getList(Rat.class).isEmpty() &&
                rp.getEntities().getList(Ball.class).size() == 10 &&
                rp.getEntities().getList(Cheese.class).size() == Const.cheeseamount &&
                rp.getEntities().getList(Border.class).size() == 4 &&
                rp.getEntities().getList(PlacementBlocker.class).size() == 4);
    }