Fix broken expired_session fixture, add test for future

backend/linkpulse/tests/test_session.py

@@ -25,10 +25,16 @@ def session(user):
 
 @pytest.fixture
 def expired_session(session):
+    session.created_at = utc_now() - timedelta(hours=2)  # Required to bypass the constraint
     session.expiry = utc_now() - timedelta(hours=1)
+    session.save()
     return session
 
 
+def test_expired_session_fixture(expired_session):
+    assert expired_session.is_expired() is True
+
+
 def test_session_create(session):
     assert Session.get_or_none(Session.token == session.token) is not None