Add and fix tests

src/allmende_payment_system/database.py

@@ -1,4 +1,5 @@
 import os
+from decimal import Decimal
 
 from sqlalchemy import create_engine, select
 from sqlalchemy.orm import Session, sessionmaker
@@ -40,10 +41,12 @@ def ensure_user(user_info: dict, session: Session) -> User:
     session.add(user)
     session.flush()
 
-    if not "APS_PRODUCTION_MODE" in os.environ:
+    if not "APS_PRODUCTION_MODE" in os.environ and not "APS_TESTRUN" in os.environ:
         # when in demo mode each user gets an account with some starting balance
         account = Account(name=f"Demokonto für {user.display_name}")
-        account.transactions.append(Transaction(total_amount=100.0, type="deposit"))
+        account.transactions.append(
+            Transaction(total_amount=Decimal(100), type="deposit")
+        )
         user.accounts.append(account)
         session.flush()