public void Subtract_Group_Of_Items_By_Index_Actually_Removes_Them_From_Catalogue(int quantity, int subtractQuantity, int result)
{
ICatalogue catalogue = new SimpleCatalogue();
IItem item = new FakeItem();
for (int i = 0; i < quantity; i++)
{
catalogue.AddItem(item);
}
int itemCount = catalogue.GetItemsCount(item);
List <IItem> items = catalogue.SubtractItems(0, subtractQuantity);
int itemCountNew = catalogue.GetItemsCount(item);
int difference = itemCount - itemCountNew;
Assert.That(difference.Equals(result));
}
public void Get_Items_Count_Of_Empty_Catalogue()
{
ICatalogue catalogue = new SimpleCatalogue();
IItem item = new FakeItem();
var exception = Assert.Throws <EmptyContainerException>(() =>
{
catalogue.GetItemsCount(item);
});
Assert.That(exception.GetType() == typeof(EmptyContainerException));
}
public void Check_If_Subtraction_Actually_Remove_Item_From_Catalogue()
{
ICatalogue catalogue = new SimpleCatalogue();
IItem fakeItem = new FakeItem();
IItem fakeItem2 = new FakeItemWithPrice();
for (int i = 0; i < 100; i++)
{
catalogue.AddItem(fakeItem);
catalogue.AddItem(fakeItem2);
}
int itemsCount = catalogue.GetItemsCount(fakeItem2);
catalogue.SubtractItem(1);
int newItemsCount = catalogue.GetItemsCount(fakeItem2);
int difference = itemsCount - newItemsCount;
Assert.That(difference.Equals(1));
}
public void Get_Items_Count_Of_Catalogue_Containing_It(int amount, int finalAmount)
{
ICatalogue catalogue = new SimpleCatalogue();
IItem item = new FakeItem();
for (int i = 0; i < amount; i++)
{
catalogue.AddItem(item);
}
int itemsCount = catalogue.GetItemsCount(item);
Assert.That(itemsCount.Equals(finalAmount));
}
public void Get_Items_Count_Of_Catalogue_Not_Containing_It()
{
ICatalogue catalogue = new SimpleCatalogue();
IItem item = new FakeItem();
IItem item2 = new FakeItemWithPrice();
catalogue.AddItem(item);
var exception = Assert.Throws <ItemMismatchException>(() =>
{
catalogue.GetItemsCount(item2);
});
Assert.That(exception.GetType() == typeof(ItemMismatchException));
}