def test_allGoodsSold2(self):

        sold = SalesProductList()
        sold.addProductsCSV("./csvs/stock-sales_2016-01-16_to_2016-01-22.csv")
        # note cost to the company is negative ie: a profit was made
        assert sold.costAll() == -128717.46  # calculated manually
    def test_allGoodsSold(self):

        sold = SalesProductList()
        sold.addProductsCSV("./csvs/stock-sales_TEST.csv")
        # note cost to the company is negative ie: a profit was made
        assert sold.costAll() == -55  # calculated manually