Added the "populate" method to the BaseTestData class, and changed it so that the tests need to call the "populate" method to populate the data, so that it may return the data with populating the database in the future.

tests/testlib.py

@@ -303,8 +303,8 @@ class BaseTestData(ABC):
         :param app: The Flask application.
         :param username: The username.
         """
-        from accounting.models import JournalEntry, JournalEntryLineItem
-        with app.app_context():
+        self.__app: Flask = app
+        with self.__app.app_context():
             current_user: User | None = User.query\
                 .filter(User.username == username).first()
             assert current_user is not None
@@ -312,10 +312,6 @@ class BaseTestData(ABC):
             self.__journal_entries: list[dict[str, t.Any]] = []
             self.__line_items: list[dict[str, t.Any]] = []
             self._init_data()
-            db.session.execute(sa.insert(JournalEntry), self.__journal_entries)
-            db.session.execute(sa.insert(JournalEntryLineItem),
-                               self.__line_items)
-            db.session.commit()
 
     @abstractmethod
     def _init_data(self) -> None:
@@ -324,6 +320,18 @@ class BaseTestData(ABC):
         :return: None
         """
 
+    def populate(self) -> None:
+        """Populates the data into the database.
+
+        :return: None
+        """
+        from accounting.models import JournalEntry, JournalEntryLineItem
+        with self.__app.app_context():
+            db.session.execute(sa.insert(JournalEntry), self.__journal_entries)
+            db.session.execute(sa.insert(JournalEntryLineItem),
+                               self.__line_items)
+            db.session.commit()
+
     @staticmethod
     def _couple(description: str, amount: str, debit: str, credit: str) \
             -> tuple[JournalEntryLineItemData, JournalEntryLineItemData]: