public void DeleteIngredientWorks()
        {
            var positionList = new PositionListDataHolder(new PositionRepositoryStub());

            positionList.LoadPositionList();
            var ingredient = new DTOIngredient(1, 1, new DTOSize(1, "size1", new Money(1), new DTOPosition(1, "1", "1")),
                                               new DTO.Consumable(1, "water", 1));

            positionList.DeleteIngredient(ingredient);
            var ingredientList = positionList.GetIngredientList(ingredient.Size);

            Assert.AreEqual(0, ingredientList.Count);
        }