public void CanBorrowBook()
{
Book myBook = new Book("Cash Craig", "Fake Book", 1991, 7);
int oldCount = myBook.AvailableAmount;
Borrowable bookBorrowable = new Borrowable(null, new Borrow(myBook));
bookBorrowable.BorrowOne();
int newCount = myBook.AvailableAmount;
Assert.AreEqual(oldCount - 1, newCount);
}
