public void CreateRule(bool nullSku, decimal batchPrice, int batchQuantity)
{
var testContext = new TestContext();
Sku sku = nullSku ? null : testContext.CreateNewSku("A", 100);
CollectionOfSameSkuForRule rule = null;
Action create = () =>
{
rule = new CollectionOfSameSkuForRule(testContext.CartFactory, sku, batchQuantity, batchPrice);
};
if (sku == null)
{
Assert.Throws <ArgumentNullException>(create);
return;
}
if (batchQuantity == 0)
{
Assert.Throws <ArgumentException>(create);
return;
}
create();
Assert.NotNull(rule.Sku);
Assert.True(rule.Quantity > 0);
Assert.True(rule.TotalPrice > 0);
}
public void WhenRightAmountOfEntriesIsBatchableThenNoResidualsAreLeft(
decimal basePrice, decimal batchPrice, int batchQuantity, int itemsNumberToAdd)
{
var testContext = new TestContext();
if (itemsNumberToAdd % batchQuantity != 0)
{
throw new TestClassException("Invalid configuration");
}
int batchesNumber = itemsNumberToAdd / batchQuantity;
var sku = testContext.CreateNewSku("A", basePrice);
var cart = testContext.CartFactory.Create();
cart.Add(sku, itemsNumberToAdd);
Assert.Equal(itemsNumberToAdd, cart.Quantity);
Assert.Single(cart);
var rule = new CollectionOfSameSkuForRule(testContext.CartFactory, sku, batchQuantity, batchPrice);
var newCart = rule.Evaluate(cart);
Assert.Equal(batchesNumber, newCart.Quantity);
Action <SkuCartEntry> batchChecker = entry =>
{
entry.CheckCartEntryWasProcessedByRule();
Assert.Equal(1, entry.Quantity);
Assert.Equal(batchPrice, entry.Price);
};
Assert.Collection(newCart, Enumerable.Repeat(batchChecker, batchesNumber).ToArray());
}
[InlineData(100, 0, 4, 2)] // Without residuals
public void CorrectTotalPriceWhenBatching(
decimal basePrice, decimal batchPrice, int batchQuantity, int itemsNumberToAdd)
{
var testContext = new TestContext();
int residualsNumber = itemsNumberToAdd % batchQuantity;
int batchesNumber = itemsNumberToAdd / batchQuantity;
var sku = testContext.CreateNewSku("A", basePrice);
var cart = testContext.CartFactory.Create();
cart.Add(sku, itemsNumberToAdd);
Assert.Equal(basePrice * itemsNumberToAdd, cart.Total);
var rule = new CollectionOfSameSkuForRule(testContext.CartFactory, sku, batchQuantity, batchPrice);
var newCart = rule.Evaluate(cart);
Assert.Equal(basePrice * residualsNumber + batchPrice * batchesNumber, newCart.Total);
}
