public void RateIsCorrect(int expected)
{
var sut = new VatVisitor(expected);
decimal actual = sut.Rate;
Assert.Equal(expected, actual);
}
public void SutIsBasketVisitor()
{
var dummyRate = .25m;
var sut = new VatVisitor(dummyRate);
Assert.IsAssignableFrom <IBasketVisitor>(sut);
}
public void DefaultAmountIsCorrect()
{
var dummyRate = .25m;
var sut = new VatVisitor(dummyRate);
decimal actual = sut.Amount;
Assert.Equal(0, actual);
}
public void RateIsCorrectFromConstructorWithAmount(int expected)
{
var dummyAmount = 1;
var sut = new VatVisitor(expected, dummyAmount);
var actual = sut.Rate;
Assert.Equal(expected, actual);
}
public void AmountIsCorrect(int expected)
{
var dummyRate = .25m;
var sut = new VatVisitor(dummyRate, expected);
var actual = sut.Amount;
Assert.Equal(expected, actual);
}
public void SutYieldsCorrectResult(int expected)
{
var dummyRate = 0.2m;
var sut = new VatVisitor(dummyRate, expected);
var v = Assert.IsAssignableFrom <Vat>(sut.Single());
Assert.Equal <decimal>(expected, v);
Assert.Equal <decimal>(expected, sut.OfType <Vat>().Single());
}
public void VisitBasketTotalReturnsCorrectResult(
int rate,
int amount)
{
var sut = new VatVisitor(rate, amount);
var actual = sut.Visit(new BasketTotal(42));
var v = Assert.IsAssignableFrom <VatVisitor>(actual);
Assert.Equal(rate, v.Rate);
Assert.Equal(amount, v.Amount);
}
public void VisitDiscountReturnsCorrectResult(
int rate,
int amount,
int discountAmount)
{
var sut = new VatVisitor(rate, amount);
var actual = sut.Visit(new Discount(discountAmount));
var v = Assert.IsAssignableFrom <VatVisitor>(actual);
Assert.Equal(rate, v.Rate);
Assert.Equal(
amount - discountAmount * rate,
v.Amount);
}
public void VisitBasketItemReturnsCorrectResult(
int rate,
int amount,
int unitPrice,
int quantity)
{
var sut = new VatVisitor(rate, amount);
var basketItem =
new BasketItem("Dummy", unitPrice, quantity);
var actual = sut.Visit(basketItem);
var v = Assert.IsAssignableFrom <VatVisitor>(actual);
Assert.Equal(
amount + basketItem.Total * rate,
v.Amount);
Assert.Equal(rate, v.Rate);
}