public void WhenActiveCartWithTwoItemsAndPayExpectPaidCart()
{
var activeCart = new CartStateActive(new[] { Product.ProductX, Product.ProductY });
const decimal paidAmount = 12.34m;
var newState = activeCart.Pay(paidAmount);
var isPaidState = newState.Func(cartStateEmpty => false, cartStateActive => false, cartStatePaid => true);
Assert.IsTrue(isPaidState);
var itemCount = newState.Func(cartStateEmpty => -1, cartStateActive => -1, cartStatePaid => cartStatePaid.Items.Count());
Assert.That(itemCount, Is.EqualTo(2));
var actualPaidAmount = newState.Func(cartStateEmpty => -1, cartStateActive => -1, cartStatePaid => cartStatePaid.Amount);
Assert.That(actualPaidAmount, Is.EqualTo(paidAmount));
}
public void WhenActiveCartWithTwoItemsAndPayExpectPaidCart()
{
var activeCart = new CartStateActive(new[] { Product.ProductX, Product.ProductY });
const decimal paidAmount = 12.34m;
var newState = activeCart.Pay(paidAmount);
// assert
var paidState = newState as CartStatePaid; //CAST!
if (paidState != null)
{
var itemCount = paidState.Items.Count();
Assert.That(itemCount, Is.EqualTo(2));
var actualPaidAmount = paidState.Amount;
Assert.That(actualPaidAmount, Is.EqualTo(paidAmount));
}
else
{
Assert.Fail("Expect CartStateActive");
}
}