public void WhenItemsBelowThreshold_DoNotCallGetDiscount()
{
var itemStoreMock = new ItemStoreMock();
var discountProviderMock = new DiscountProviderMock();
var calculator = new PrimaryReceiptCalculator(itemStoreMock, discountProviderMock);
calculator.GenerateReceipt();
Assert.False(discountProviderMock.GetDiscountCalled);
}
public void WhenItemsAtThreshold_CallGetDiscount()
{
var itemStoreMock = new ItemStoreMock();
var discountProviderMock = new DiscountProviderMock();
var calculator = new PrimaryReceiptCalculator(itemStoreMock, discountProviderMock);
itemStoreMock.Items.Add((1, String.Empty, 50));
calculator.AddItem(1);
calculator.GenerateReceipt();
Assert.True(discountProviderMock.GetDiscountCalled);
}
public void ExampleTest()
{
var itemStoreMock = new ItemStoreMock();
var discountProviderMock = new DiscountProviderMock();
var calculator = new PrimaryReceiptCalculator(itemStoreMock, discountProviderMock);
itemStoreMock.Items.Add((1, "One", 1));
itemStoreMock.Items.Add((2, "Two", 5));
itemStoreMock.Items.Add((3, "Three", 10));
itemStoreMock.Items.Add((4, "Four", 25));
itemStoreMock.Items.Add((5, "Five", 50));
discountProviderMock.Discount = 3;
calculator.AddItem(5);
calculator.AddItem(3);
calculator.AddItem(1);
var receipt = calculator.GenerateReceipt();
Assert.True(discountProviderMock.GetDiscountCalled);
var itemsList = receipt.Items.ToList();
Assert.Equal(3, itemsList.Count);
var item1 = itemsList[0];
var item2 = itemsList[1];
var item3 = itemsList[2];
Assert.Equal(5, item1.Id);
Assert.Equal(3, item2.Id);
Assert.Equal(1, item3.Id);
Assert.Equal("Five", item1.Name);
Assert.Equal("Three", item2.Name);
Assert.Equal("One", item3.Name);
Assert.Equal(50, item1.Price);
Assert.Equal(10, item2.Price);
Assert.Equal(1, item3.Price);
Assert.Equal(3, receipt.Discount);
Assert.Equal(58, receipt.Subtotal);
Assert.Equal(2.755m, receipt.Taxes);
Assert.Equal(60.755m, receipt.Total);
}