def test_bill_creation(self): # create users u1 = User(username='******', email='*****@*****.**') u2 = User(username='******', email='*****@*****.**') u3 = User(username='******', email='*****@*****.**') u4 = User(username='******', email='*****@*****.**') db.session.add_all([u1, u2, u3, u4]) db.session.commit() # create a bill to split b = Bill(title='New Bill', desc='some description', amount=250, payer=u3) db.session.add(b) db.session.commit() self.assertTrue(len(b.bill_details) == 1) self.assertTrue(b.bill_details[0].user == u3) participants = [u1, u2, u3, u4] shares = [50, 100, 75, 25] for participant, share in zip(participants, shares): b.add_participant(participant, share) db.session.commit() self.assertTrue(len(b.bill_details) == 4)