Category overhaul (#20)

Reviewed-on: #20
Co-authored-by: Mathias <mathias2784@web.de>

tests/test_smoke_b4w.py

@@ -1,8 +1,17 @@
 from datetime import date
 
 import faker
+from sqlalchemy.orm import Session
 
 from src.models.b4w import B4wDb
+from src.models.category import CategoryDb, upsert_category
+from tests.factories import CategoryFactory
+
+
+def _load_initial_categories(session: Session) -> None:
+    for category in CategoryFactory.build_all():
+        upsert_category(session, category, do_commit=False)
+    session.commit()
 
 
 def test_b4w_populate(populated_db_b4w):
@@ -10,10 +19,12 @@ def test_b4w_populate(populated_db_b4w):
     session = populated_db_b4w(
         "b4w_basic",
         100,
+        setup=_load_initial_categories,
         ValDt=lambda: faker.Faker().date_between(val_dt_min, val_dt_max),
     )
     assert session
     assert session.query(B4wDb).count() == 100
+    assert session.query(CategoryDb).count() >= len(CategoryFactory.build_all())
     # ``ValDt`` was given as a per-row callable: it must have been resolved
     # and persisted for every row.
     dates = [d for (d,) in session.query(B4wDb.date_valid).all()]