public void ByWeightLineItemWithCouponDiscountHasCorrectPriceTest()
{
// Arrange
// pricePerKilo = 5.00m
ILineItem byWeightLineItem1 = new ByWeightLineItem(1, 2.00);
ILineItem byWeightLineItem2 = new ByWeightLineItem(1, 8.00);
const decimal expectedPrice1 = 10.00m;
const decimal expectedPrice2 = 25.00m;
// Does not qualify for discount since price < discount
CouponDiscountLineItem couponDiscountLineItem1 = new CouponDiscountLineItem(byWeightLineItem1)
{
CouponDiscount = 15.00m
};
// Qualifies for discount since price > discount
CouponDiscountLineItem couponDiscountLineItem2 = new CouponDiscountLineItem(byWeightLineItem2)
{
CouponDiscount = 15.00m
};
// Act
decimal actualPrice1 = couponDiscountLineItem1.GetPrice();
decimal actualPrice2 = couponDiscountLineItem2.GetPrice();
// Assert
Assert.Multiple(() =>
{
Assert.That(actualPrice1, Is.EqualTo(expectedPrice1));
Assert.That(actualPrice2, Is.EqualTo(expectedPrice2));
});
}
public void FixedPriceLineItemWithCouponDiscountHasCorrectPriceTest()
{
// Arrange
// unitPrice = 10.00m
ILineItem fixedPriceLineItem1 = new FixedPriceLineItem(1); // quantity defaults to 1
ILineItem fixedPriceLineItem2 = new FixedPriceLineItem(1, 4);
const decimal expectedPrice1 = 10.00m;
const decimal expectedPrice2 = 25.00m;
// Does not qualify for discount since price < discount
CouponDiscountLineItem couponDiscountLineItem1 = new CouponDiscountLineItem(fixedPriceLineItem1)
{
CouponDiscount = 15.00m
};
// Qualifies for discount since price > discount
CouponDiscountLineItem couponDiscountLineItem2 = new CouponDiscountLineItem(fixedPriceLineItem2)
{
CouponDiscount = 15.00m
};
// Act
decimal actualPrice1 = couponDiscountLineItem1.GetPrice();
decimal actualPrice2 = couponDiscountLineItem2.GetPrice();
// Assert
Assert.Multiple(() =>
{
Assert.That(actualPrice1, Is.EqualTo(expectedPrice1));
Assert.That(actualPrice2, Is.EqualTo(expectedPrice2));
});
}
public void CouponDiscountWithNullArgumentThrowsExceptionTest()
{
// Assert
Assert.Throws <ArgumentNullException>(() =>
{
// ReSharper disable once UnusedVariable
CouponDiscountLineItem couponDiscountLineItem = new CouponDiscountLineItem(null)
{
CouponDiscount = 10.00m
};
}
);
}
public void CouponDiscountWithNonPositiveDiscountPerecntageThrowsExceptionTest()
{
// Arrange
ILineItem lineItem = new FixedPriceLineItem(1);
// Assert
Assert.Throws <Exception>(() =>
{
// ReSharper disable once UnusedVariable
CouponDiscountLineItem bulkDiscountLineItem = new CouponDiscountLineItem(lineItem)
{
CouponDiscount = -10m
};
}
);
}
public void DoubleDiscountedLineItemHasCorrectPriceTest()
{
// Arrange
// unitPrice = 10.00m
ILineItem fixedPriceLineItem = new FixedPriceLineItem(1, 3);
const decimal expectedPrice = 22.00m;
BulkDiscountLineItem bulkDiscountLineItem = new BulkDiscountLineItem(fixedPriceLineItem)
{
DiscountThreshold = 20.00m,
DiscountPercentage = 10
};
CouponDiscountLineItem couponDiscountLineItem = new CouponDiscountLineItem(bulkDiscountLineItem)
{
CouponDiscount = 5.00m
};
// Act
decimal actualPrice = couponDiscountLineItem.GetPrice();
// Assert
Assert.That(actualPrice, Is.EqualTo(expectedPrice));
}
