public void GetPrice_ArrayHasZeroValues_Returns0()
{
//Arrange
int[] cart = { };
var bookPriceCalculator = new BookPriceCalculator(cart);
//Action
var totalPrice = bookPriceCalculator.GetPrice();
//Assert
Assert.AreEqual(0, totalPrice);
}
public void GetPrice_2SetsOf2BooksSame_ReturnsSpecialDiscount()
{
//Arrange
int[] cart =
{
1, 2, 2, 1
};
var bookPriceCalculator = new BookPriceCalculator(cart);
//Action
var totalPrice = bookPriceCalculator.GetPrice();
//Assert
Assert.AreEqual(2 * (8 * 2 * .95), totalPrice);
}
public void GetPrice_FiveValuesOfSameBook_ReturnsSumofPrices()
{
//Arrange
int[] cart =
{
1, 1, 1, 1, 1
};
var bookPriceCalculator = new BookPriceCalculator(cart);
//Action
var totalPrice = bookPriceCalculator.GetPrice();
//Assert
Assert.AreEqual(8 * 5, totalPrice);
}
public void GetPrice_OneValue_ReturnsPriceOfThatBook()
{
//Arrange
int[] cart =
{
1
};
var bookPriceCalculator = new BookPriceCalculator(cart);
//Action
var totalPrice = bookPriceCalculator.GetPrice();
//Assert
Assert.AreEqual(8, totalPrice);
}
public void GetPrice_FiveValuesOfDifferentBook_ReturnsPriceWith25PercentDiscount()
{
//Arrange
int[] cart =
{
1, 2, 3, 4, 5
};
var bookPriceCalculator = new BookPriceCalculator(cart);
//Action
var totalPrice = bookPriceCalculator.GetPrice();
//Assert
Assert.AreEqual(8 * 5 * .75, totalPrice);
}
public void GetPrice_2BooksSame4BooksDifferent_ReturnsSpecialDiscount()
{
//Arrange
int[] cart =
{
0, 1, 1, 2, 3, 4
};
var bookPriceCalculator = new BookPriceCalculator(cart);
//Action
var totalPrice = bookPriceCalculator.GetPrice();
//Assert
Assert.AreEqual(8 + (8 * 5 * 0.75), totalPrice,
"Total was supposed to be " + (8 + (8 * 5 * 0.75)) + "but was " + totalPrice);
}
public void GetPrice_Special_ReturnsSpecialDiscount()
{
//Arrange
int[] cart =
{
0, 0, 0,
1, 1,
2, 2, 2, 2,
3, 3,
4
};
var bookPriceCalculator = new BookPriceCalculator(cart);
//Action
var totalPrice = bookPriceCalculator.GetPrice();
//Assert
Assert.AreEqual((8 * 4 * 0.8) + (8 * 2 * 0.95) + 8 + (8 * 5 * .75), totalPrice);
}
public void GetPrice_IncrementalBasket_ReturnsSpecialDiscount()
{
//Arrange
int[] cart =
{
0,
1, 1,
2, 2, 2,
3, 3, 3, 3,
4, 4, 4, 4, 4
};
var bookPriceCalculator = new BookPriceCalculator(cart);
//Action
var totalPrice = bookPriceCalculator.GetPrice();
//Assert
Assert.AreEqual(100, totalPrice);
}
public void Init()
{
this._bookPriceCalculator = new BookPriceCalculator();
}
