    @Test
    public void addItemDifferingItems() throws Exception {

        VoxelwindBaseInventory inventory = new VoxelwindBaseInventory(InventoryType.CHEST);
        assertTrue("Can't add item even when inventory is empty", inventory.addItem(new VoxelwindItemStack(BlockTypes.DIRT, 1, null)));
        assertTrue("Can't add item but no conflicts exist", inventory.addItem(new VoxelwindItemStack(BlockTypes.STONE, 1, null)));
    }