public void DecreaseInventory_MultipleArticles_Success()
{
const decimal initialP1 = 30;
const decimal initialP2 = 10;
//arrange
var shop = ProductAssemblyShop.DeepCopy();
shop.Inventory = new HashSet <InventoryItem>()
{
new InventoryItem(Product1InteriorDoor, initialP1),
new InventoryItem(Product2InteriorDoor, initialP2),
};
var items = new[]
{
new InventoryItem(Product1InteriorDoor, 5),
new InventoryItem(Product2InteriorDoor, 6),
};
//act
InventoryService.DecreaseInventory(items, shop);
//assert
var actualP1 = shop.Inventory.Of(Product1InteriorDoor).Amount;
var actualP2 = shop.Inventory.Of(Product2InteriorDoor).Amount;
Assert.That(actualP1, Is.EqualTo(initialP1 - items[0].Amount));
Assert.That(actualP2, Is.EqualTo(initialP2 - items[1].Amount));
}
public void DecreaseInventory_FailFor_ArticleNotInStock()
{
//arrange
var shop = ProductAssemblyShop.DeepCopy();
shop.Inventory = new HashSet <InventoryItem>();
var item = new InventoryItem(Product1InteriorDoor, 5);
//assert () => act
var ex = Assert.Throws <DomainException>(() => InventoryService.DecreaseInventory(item, shop));
Assert.That(ex.Message, Is.EqualTo(ArticleNotInStock(item.Article, shop)));
}
public void DecreaseInventory_SingleArticle_Success()
{
const decimal initial = 15;
//arrange
var shop = ProductAssemblyShop.DeepCopy();
shop.Inventory = new HashSet <InventoryItem>()
{
new InventoryItem(Product1InteriorDoor, initial)
};
var item = new InventoryItem(Product1InteriorDoor, 5);
//act
InventoryService.DecreaseInventory(item, shop);
//assert
var actual = shop.Inventory.Of(Product1InteriorDoor).Amount;
Assert.That(actual, Is.EqualTo(initial - item.Amount));
}