add merge funcions for units (#1146)

tests/unit_tests/repository_tests/test_unit_repository.py

@@ -0,0 +1,48 @@
+from mealie.repos.repository_factory import AllRepositories
+from mealie.schema.recipe.recipe import Recipe
+from mealie.schema.recipe.recipe_ingredient import RecipeIngredient, SaveIngredientUnit
+from tests.utils.factories import random_string
+from tests.utils.fixture_schemas import TestUser
+
+
+def test_unit_merger(database: AllRepositories, unique_user: TestUser):
+    slug1 = random_string(10)
+
+    unit_1 = database.ingredient_units.create(
+        SaveIngredientUnit(
+            name=random_string(10),
+            group_id=unique_user.group_id,
+        )
+    )
+
+    unit_2 = database.ingredient_units.create(
+        SaveIngredientUnit(
+            name=random_string(10),
+            group_id=unique_user.group_id,
+        )
+    )
+
+    recipe = database.recipes.create(
+        Recipe(
+            name=slug1,
+            user_id=unique_user.group_id,
+            group_id=unique_user.group_id,
+            recipe_ingredient=[
+                RecipeIngredient(note="", unit=unit_1),  # type: ignore
+                RecipeIngredient(note="", unit=unit_2),  # type: ignore
+            ],
+        )  # type: ignore
+    )
+
+    # Santiy check make sure recipe got created
+    assert recipe.id is not None
+
+    for ing in recipe.recipe_ingredient:
+        assert ing.unit.id in [unit_1.id, unit_2.id]  # type: ignore
+
+    database.ingredient_units.merge(unit_2.id, unit_1.id)
+
+    recipe = database.recipes.get_one(recipe.slug)
+
+    for ingredient in recipe.recipe_ingredient:
+        assert ingredient.unit.id == unit_1.id  # type: ignore