public void Given_Cart_When_NoDiscountedProductFound_Then_NoDiscountApplies()
{
// Arrange
var items = new List <CartItem>
{
new CartItem(new Product("Milk", 1.0m), 1),
new CartItem(new Product("Tomato", 0.50m), 1)
};
var sut = new PercentageDiscount("Apples", 10, new DateTime(2018, 11, 19));
// Act
var result = sut.Apply(items);
// Assert
Assert.Empty(result);
}
public void Given_Cart_When_DiscountExpires_Then_RemoveDiscount()
{
var expires = Substitute.For <IDateTime>(new DateTime(2018, 11, 19));
var items = new List <CartItem>
{
new CartItem(new Product("Milk", 1.0m), 1),
new CartItem(new Product("Tomato", 0.50m), 1),
new CartItem(new Product("Apples", 1.0m), 1)
};
var sut = new PercentageDiscount("Apples", 10, new DateTime(2018, 11, 19));
// Act
var result = sut.Apply(items);
// Assert
Assert.Equal(expires, result);
}
public void Given_Cart_When_DiscountedProductFound_Then_ApplyDiscount(int quantity, decimal expectedDiscount, string expectedDescription)
{
// Arrange
var items = new List <CartItem>
{
new CartItem(new Product("Milk", 1.0m), 1),
new CartItem(new Product("Tomato", 0.50m), 1),
new CartItem(new Product("Apples", 1.0m), quantity)
};
var sut = new PercentageDiscount("Apples", 10, new DateTime(2018, 11, 19));
// Act
var result = sut.Apply(items);
// Assert
Assert.Collection(result, d =>
{
Assert.Equal(expectedDescription, d.Description);
Assert.Equal(expectedDiscount, d.Amount);
});
}
