    @Test
    public void testGetMissing() throws Exception {

        InventoryVector newIV = getObjectMessage(1, 200, getGetPubkey()).getInventoryVector();
        List<InventoryVector> offer = new LinkedList<>();
        offer.add(newIV);
        offer.add(inventoryVector1);
        List<InventoryVector> missing = inventory.getMissing(offer, 1, 2);
        assertEquals(1, missing.size());
        assertEquals(newIV, missing.get(0));
    }