def test_session_to_group(self):
m = Mentor(name='Snoke')
g1 = Group(name='Solo')
g2 = Group(name='Generals')
s1 = Student(name='Ray')
s2 = Student(name='Kylo')
s3 = Student(name='Hux')
db.session.add(m)
db.session.add(g1)
db.session.add(g2)
db.session.add(s1)
db.session.add(s2)
db.session.add(s3)
db.session.commit()
sesh1 = Session()
g1.add_session(sesh1)
db.session.add(sesh1)
db.session.commit()
g1.add_student(s1)
g1.add_student(s2)
g2.add_student(s3)
assert g1.has_session(sesh1)
assert sesh1.group_id == g1.id
