def _build_items(self, **kwargs):
        """
        This requires a populated EffectCollection in order
        to build the items due to the fact that items can have
        associated effects.
        """
        self.log.info("Building items")

        effect_collection = kwargs["effect_collection"]

        item_builder = ItemBuilder()
        item_model = ItemModel(db=self.db)
        item_models = item_model.get_items()
        item_effects_model = ItemEffects(db=self.db)
        item_effects_map = item_effects_model.get_item_effects()
        item_collection = ItemCollection()
        items = item_builder.build_items(item_models=item_models,
                                         item_effects_map=item_effects_map,
                                         effect_collection=effect_collection)

        for item in items:
            item_collection.add(item)

        return item_collection
    def test_build_world(self):
        """
        Utilize models to build the world.

        1. Get dungeons
        2. Get effects
        3. Get item effects
        4. Get items
        5. Get unit items
        6. Get units
        """

        """ Dungeons """
        dungeon_model = DungeonModel(db=self.db)
        dungeon_models = dungeon_model.get_dungeons()

        self.assertIsInstance(dungeon_models, list)
        self.assertTrue(dungeon_models)

        """ Effects """
        effects_model = EffectModel(db=self.db)
        effects_models = effects_model.get_effects()

        self.assertIsInstance(effects_models, list)
        self.assertTrue(effects_models)

        """ Unit effects map """
        unit_effects_model = UnitEffects(db=self.db)
        unit_effects = unit_effects_model.get_unit_effects()
        unit_effects_map = unit_effects_model._get_unit_effects_map(unit_effects)

        self.assertIsInstance(unit_effects_map, dict)
        self.assertTrue(unit_effects_map)

        """ Unit dialogue map """
        unit_dialogue_model = UnitDialogueModel(db=self.db)
        unit_dialogue = unit_dialogue_model.get_unit_dialogue()
        unit_dialogue_map = unit_dialogue_model._get_unit_dialogue_map(unit_dialogue)

        self.assertIsInstance(unit_dialogue, list)
        self.assertIsInstance(unit_dialogue_map, dict)
        self.assertTrue(unit_dialogue_map)

        """ Item effects map """
        item_effects_model = ItemEffects(db=self.db)
        item_effects = item_effects_model.get_item_effects()
        item_effects_map = item_effects_model._get_item_effects_map(item_effects)

        self.assertIsInstance(item_effects, list)
        self.assertIsInstance(item_effects_map, dict)
        self.assertTrue(item_effects_map)
        self.assertTrue(item_effects)

        """ Items """
        item_model = ItemModel(db=self.db)
        item_models = item_model.get_items()

        self.assertIsInstance(item_models, list)
        self.assertTrue(item_models)

        """ Unit items map """
        unit_items_model = UnitItems(db=self.db)
        unit_item_models = unit_items_model.get_unit_items()
        unit_items_map = unit_items_model._get_unit_items_map(unit_item_models)

        self.assertIsInstance(unit_item_models, list)
        self.assertIsInstance(unit_items_map, dict)
        self.assertTrue(unit_items_map)
        self.assertTrue(unit_item_models)

        """ Units """
        unit_model = UnitModel(db=self.db)
        unit_models = unit_model.get_units()

        self.assertIsInstance(unit_models, list)
        self.assertTrue(unit_models)

        """ Assemble collections using models """
        item_collection = ItemCollection()
        effect_collection = EffectCollection()
        dialogue_collection = UnitDialogueCollection()

        for effect_model in effects_models:
            effect = Effect(effect=effect_model)
            effect_collection.add(effect)

        self.assertTrue(effect_collection.effects)

        item_builder = ItemBuilder()
        items = item_builder.build_items(item_models=item_models,
                                         item_effects_map=item_effects_map,
                                         effect_collection=effect_collection)
        self.assertIsInstance(items, list)
        self.assertTrue(items)

        for item in items:
            item_collection.add(item)

        self.assertTrue(item_collection.items)

        for ud in unit_dialogue:
            dialogue = UnitDialogue(dialogue=ud)
            dialogue_collection.add(dialogue)

        """ Build units using assembled collections """
        unit_builder = UnitBuilder()

        with LogCapture() as l:
            logger = logging.getLogger()
            units = unit_builder.build_units(unit_models=unit_models,
                                             effect_collection=effect_collection,
                                             item_collection=item_collection,
                                             dialogue_collection=dialogue_collection,
                                             unit_items_map=unit_items_map,
                                             unit_effects_map=unit_effects_map,
                                             unit_dialogue_map=unit_dialogue_map,
                                             log=logger)

        self.assertIsInstance(units, list)
        self.assertTrue(units)

        num_players = 0

        for unit in units:
            self.assertIsInstance(unit, Unit)

            if unit.is_player:
                num_players += 1

        self.assertTrue(num_players > 0)

        """
        Populate collections
        """
        unit_collection = UnitCollection()

        for unit in units:
            unit_collection.add(unit)

        self.assertEqual(len(unit_collection.units), len(unit_models))