End to End GUI Development with Qt5

Adding a fridge

To truly understand the usefulness of separating usecases from entities, we might also want to add another entity, the  fridge. In usecases like add/remove grocery item, we could change the fridge's status (empty/non-empty) whenever an item is added/removed. To achieve this, we will add entities::Fridge to our system, and call the update of its isEmpty method when a grocery item has been added/removed, and before returning the success/failure of the respective use case.

Try adding entities::Fridge as described, and augment usecases::AddGroceryItem and usecases::RemoveGroceryItem accordingly. In the use case tests, you will likely need to add a few scenarios to take into consideration what happens to the fridge (and the groceries ...