public void SutIsBasketVisitor()
{
var dummyThreshold = 100;
var dummyRate = .05m;
var sut = new VolumeDiscountVisitor(dummyThreshold, dummyRate);
Assert.IsAssignableFrom <IBasketVisitor>(sut);
}
public void RateIsCorrect(int expected)
{
var dummyThreshold = 100;
var sut = new VolumeDiscountVisitor(dummyThreshold, expected);
decimal actual = sut.Rate;
Assert.Equal(expected, actual);
}
public void ThresholdIsCorrect(int expected)
{
var dummyRate = .05m;
var sut = new VolumeDiscountVisitor(expected, dummyRate);
decimal actual = sut.Threshold;
Assert.Equal(expected, actual);
}
public void DefaultAmountIsCorrect()
{
var dummyThreshold = 100;
var dummyRate = .05m;
var sut = new VolumeDiscountVisitor(dummyThreshold, dummyRate);
decimal actual = sut.Subtotal;
Assert.Equal(0, actual);
}
public void RateIsCorrectFromConstructorWithSubtotal(int expected)
{
var dummyThreshold = 200;
var dummySubtotal = 300;
var sut = new VolumeDiscountVisitor(
dummyThreshold, expected, dummySubtotal);
var actual = sut.Rate;
Assert.Equal(expected, actual);
}
public void ThresholdIsCorrectFromConstructorWithSubtotal(int expected)
{
var dummyRate = .05m;
var dummySubtotal = 4.2m;
var sut = new VolumeDiscountVisitor(
expected, dummyRate, dummySubtotal);
var actual = sut.Threshold;
Assert.Equal(expected, actual);
}
public void SubtotalIsCorrect(int expected)
{
var dummyThreshold = 100;
var dummyRate = .05m;
var sut = new VolumeDiscountVisitor(
dummyThreshold, dummyRate, expected);
var actual = sut.Subtotal;
Assert.Equal(expected, actual);
}
public void SutYieldsCorrectResultWhenSubtotalIsBelowThreshold(
int threshold,
int subtotal)
{
var dummyRate = .03m;
var sut =
new VolumeDiscountVisitor(threshold, dummyRate, subtotal);
Assert.False(sut.Any());
Assert.Empty(sut);
}
public void SutYieldsCorrectResultWhenSubtotalIsAboveThreshold(
int threshold,
int rate,
int subtotal)
{
var sut = new VolumeDiscountVisitor(threshold, rate, subtotal);
var d = Assert.IsAssignableFrom <Discount>(sut.Single());
Assert.Equal(subtotal * rate, d.Amount);
Assert.Equal(
subtotal * rate,
sut.OfType <Discount>().Single().Amount);
}
public void VisitVatReturnsCorrectResult(
int threshold,
int rate,
int subtotal)
{
var sut = new VolumeDiscountVisitor(threshold, rate, subtotal);
var actual = sut.Visit(new Vat(1337));
var vd = Assert.IsAssignableFrom <VolumeDiscountVisitor>(actual);
Assert.Equal(threshold, vd.Threshold);
Assert.Equal(rate, vd.Rate);
Assert.Equal(subtotal, vd.Subtotal);
}
public void VisitBasketItemReturnsCorrectResult(
int threshold,
int rate,
int subtotal,
int unitPrice,
int quantity)
{
var sut = new VolumeDiscountVisitor(threshold, rate, subtotal);
var basketItem =
new BasketItem("Dummy", unitPrice, quantity);
var actual = sut.Visit(basketItem);
var vd = Assert.IsAssignableFrom <VolumeDiscountVisitor>(actual);
Assert.Equal(threshold, vd.Threshold);
Assert.Equal(rate, vd.Rate);
Assert.Equal(subtotal + basketItem.Total, vd.Subtotal);
}
