public void should_fail_if_one_of_bought_product_amount_is_less_than_or_equal_to_zero(int invalidAmount)
{
PosService posService = CreatePosService();
var invalidProduct = new BoughtProduct("barcode001", invalidAmount);
var validProduct = new BoughtProduct("barcode002", 1);
BoughtProduct[] boughtProducts = {invalidProduct, validProduct};
Assert.Throws<ArgumentException>(() => posService.GetReceipt(boughtProducts));
}
public void should_merge_receipt_items()
{
CreateProductFixture(
new Product {Barcode = "barcodesame", Name = "I do not care" },
new Product {Barcode = "barcodediff", Name = "I do not care" });
PosService posService = CreatePosService();
var boughtProduct = new BoughtProduct("barcodesame", 1);
var sameBoughtProduct = new BoughtProduct("barcodesame", 2);
var differentBoughtProduct = new BoughtProduct("barcodediff", 1);
Receipt receipt = posService.GetReceipt(
new[] {boughtProduct, differentBoughtProduct, sameBoughtProduct});
Assert.Equal(receipt.ReceiptItems.Single(i => i.Product.Barcode == "barcodesame").Amount, 3);
Assert.Equal(receipt.ReceiptItems.Single(i => i.Product.Barcode == "barcodediff").Amount, 1);
}
public void should_fail_if_bought_product_does_not_exist()
{
PosService posService = CreatePosService();
var notExistedProduct = new BoughtProduct("barcode", 1);
Assert.Throws<ArgumentException>(() => posService.GetReceipt(new[] {notExistedProduct}));
}