public void Change_product_cost_based_on_new_cost_and_amount()
{
//Arrange
var bill = new BillBuilder()
.Build();
Assert.Empty(bill.Purchases);
var product = new Product("", new ProductBarcode(""), new MoneyValue(0), null);
//Act
bill.AddPurchaseBasedOnExistingProduct(product, 5.0f, 15.0f);
//Assert
Assert.Equal(3, bill.Purchases.FirstOrDefault().Product.Price.Value);
}
public void Purchase_contains_same_product_if_cost_doesnt_change()
{
//Arrange
var bill = new BillBuilder()
.Build();
Assert.Empty(bill.Purchases);
var product = new Product("", new ProductBarcode(""), new MoneyValue(12.5f), null);
//Act
bill.AddPurchaseBasedOnExistingProduct(product, 2.0f, 25.0f);
//Assert
Assert.Equal(product, bill.Purchases.FirstOrDefault().Product);
}
public void Increase_bill_sum_by_new_purchase_value()
{
//Arrange
var bill = new BillBuilder()
.Build();
Assert.Empty(bill.Purchases);
var product = new ProductBuilder().Build();
//Act
Assert.Equal(0.0f, bill.GetSum());
bill.AddPurchaseBasedOnExistingProduct(product, 1.0f, 25.0f);
//Assert
Assert.Equal(25.0f, bill.GetSum());
}
public void New_purchase_contains_date_from_bill()
{
//Arrange
var billDate = new DateTime(2137, 9, 11);
var bill = new BillBuilder()
.WithDate(billDate)
.Build();
Assert.Empty(bill.Purchases);
var product = new Product("", new ProductBarcode(""), new MoneyValue(0), null);
//Act
bill.AddPurchaseBasedOnExistingProduct(product, 0, 0);
//Assert
Assert.Single(bill.Purchases);
Assert.Equal(billDate, bill.Purchases.FirstOrDefault().Date);
}