@Test
public void testCheckShipment_costUnKnown() {

    StockOpImpl operator = new StockOpImpl();
    Shipment shipment = new Shipment();
    shipment.setShippedDate(new DateTime());
    ShipmentStatus actual = operator.checkShipment(shipment);
    assertThat(actual, is(ShipmentStatus.COST_UNKNOWN));
}