public void DiscountOf_TwoBooks_Equal()
{
// Arrange
List <Book> books = new BooksBuilder()
.AddBook(BookType.FirstBook)
.AddBook(BookType.FirstBook);
//Act
var price = _booksCalculation.GetPriceBooks(books);
Assert.Equal(16, price);
}
public void DiscountOf_ThreeBooks()
{
// Arrange
List <Book> books = new BooksBuilder()
.AddBook(BookType.FirstBook)
.AddBook(BookType.SecondBook)
.AddBook(BookType.ThirdBook);
//Act
var price = _booksCalculation.GetPriceBooks(books);
Assert.Equal(21.6m, price);
}
public void DiscountOf_FiveBooks()
{
List <Book> books = new BooksBuilder()
.AddBook(BookType.FirstBook)
.AddBook(BookType.SecondBook)
.AddBook(BookType.ThirdBook)
.AddBook(BookType.FourthBook)
.AddBook(BookType.FifthBook);
//Act
var price = _booksCalculation.GetPriceBooks(books);
Assert.Equal(30, price);
}
public void DiscountOf_TwoEqualBooks_Plus_TowEqualsBooks_PlushTwoEqualsBooks()
{
// Arrange
List <Book> books = new BooksBuilder()
.AddBook(BookType.FirstBook)
.AddBook(BookType.FirstBook)
.AddBook(BookType.SecondBook)
.AddBook(BookType.SecondBook)
.AddBook(BookType.ThirdBook)
.AddBook(BookType.ThirdBook);
//Act
var price = _booksCalculation.GetPriceBooks(books);
//assert 3 * (8 * 2 * 0.95)
Assert.Equal(45.6m, price);
//Calculation of groups by type is incorrect :(
}
public void ManyBooks_GetsBestPrice()
{
// Arrange
List <Book> books = new BooksBuilder()
.AddBook(BookType.FirstBook)
.AddBook(BookType.FirstBook)
.AddBook(BookType.SecondBook)
.AddBook(BookType.SecondBook)
.AddBook(BookType.ThirdBook)
.AddBook(BookType.ThirdBook)
.AddBook(BookType.FourthBook)
.AddBook(BookType.FifthBook);
//Act
var price = _booksCalculation.GetPriceBooks(books);
Assert.Equal(51.2m, price);
}
