def test_create_units(self):
        """
        The item collection is populated by models
        """
        item_collection = ItemCollection()
        effect_collection = EffectCollection()
        dialogue_collection = UnitDialogueCollection()

        """
        Prepare unit model collection
        """
        unit_models = []
        expected_units = []
        unit_items = []
        unit_effects = []
        unit_dialogue = []
        unit_items_model = UnitItems(db="quux")
        unit_effects_model = UnitEffects(db="quux")
        unit_dialogue_model = UnitDialogueModel(db="quux")

        total_units = 25
        item_types = ("rock", "paper", "scissors", "paper", "spock")
        total_items_per_unit = len(item_types)
        total_effects_per_unit = 5
        total_dialogue_per_unit = 5

        for j in range(0, total_units):
            """
            Add items for each unit
            """
            items = []
            effects = []
            dialogue = []
            unit_model = self._get_unit_model()
            unit_id = unit_model["id"]
            unit_type_id = unit_model["unit_type_id"]

            for it in item_types:
                item = self._make_item(item_type=it,
                                       unit_type_id=unit_type_id)
                items.append(item)
                item_collection.add(item)
                unit_items.append({"item_id": item.id, "unit_id": unit_id})

            unit_model["items"] = items

            """
            Base items
            """
            unit_model["base_items"] = \
                item_collection.get_base_items_by_unit_type_id(unit_type_id)

            """
            Add effects
            """
            for k in range(0, total_effects_per_unit):
                effect = self._make_effect()
                effects.append(effect)
                effect_collection.add(effect)
                unit_effects.append(
                    {"effect_id": effect.id, "unit_id": unit_id})

            unit_model["effects"] = effects

            """
            Add dialogue
            """
            for q in range(0, total_dialogue_per_unit):
                a_dialogue = self._make_dialogue()
                dialogue.append(a_dialogue)
                dialogue_collection.add(a_dialogue)
                unit_dialogue.append(
                    {"dialogue_id": a_dialogue.id, "unit_id": unit_id})

            unit_model["dialogue"] = dialogue

            """
            Add completed unit to expected
            """
            unit_models.append(unit_model)

            with LogCapture():
                logger = logging.getLogger()
                unit = Unit(unit=unit_model, log=logger)

            expected_units.append(unit)

        unit_items_map = unit_items_model._get_unit_items_map(unit_items)
        unit_effects_map = unit_effects_model._get_unit_effects_map(
            unit_effects)
        unit_dialogue_map = unit_dialogue_model._get_unit_dialogue_map(
            unit_dialogue)

        builder = UnitBuilder()
        with LogCapture():
            logger = logging.getLogger()
            actual_units = builder.build_units(unit_models=unit_models,
                                               unit_items_map=unit_items_map,
                                               item_collection=item_collection,
                                               effect_collection=effect_collection,
                                               unit_effects_map=unit_effects_map,
                                               dialogue_collection=dialogue_collection,
                                               unit_dialogue_map=unit_dialogue_map,
                                               log=logger)

        expected_unit_ids = [unit.id for e_unit in expected_units]
        actual_unit_ids = [unit.id for a_unit in actual_units]

        self.assertEqual(expected_unit_ids, actual_unit_ids)

        """
        Test that the actual units contain the expected items
        and effects
        """
        self.assertEqual(len(actual_units), len(expected_units))

        for e_unit in expected_units:
            self.assertEqual(len(e_unit.items), total_items_per_unit)
            self.assertEqual(len(e_unit.effects), total_effects_per_unit)
            self.assertEqual(len(e_unit.dialogue), total_dialogue_per_unit)

        for a_unit in actual_units:
            self.assertEqual(len(a_unit.items), total_items_per_unit)
            self.assertEqual(len(a_unit.effects), total_effects_per_unit)
            self.assertEqual(len(a_unit.dialogue), total_dialogue_per_unit)

            """
            Ensure each item either has no unit type requirement (0)
            or it matches the unit in question
            """
            for a_item in a_unit.items:
                self.assertIn(a_item.unit_type_id, (0, a_unit.unit_type_id))