def test_parents_to_students(self): u1 = User(username='******', email='*****@*****.**') u2 = User(username='******',email='*****@*****.**') db.session.add(u1) db.session.add(u2) db.session.commit() s1 = Student(name='Fin') s2 = Student(name='Ray') db.session.add(s1) db.session.add(s2) db.session.commit() u1.add_student(s1) u1.add_student(s2) assert u1.has_student(s1) assert u1.has_student(s2) assert s1.has_parent(u1) u2.add_student(s1) assert s1.has_parent(u2)