def test_vote_to_comment():
user = User("a")
comment = Comment("dummy")
assert comment.receive_vote_from(user) == user.vote_to_comment(comment)
def test_receive_vote_from():
comment1 = Comment(body, voted_users)
accept = voted_users + ["cccc"]
comment1.receive_vote_from("cccc")
assert comment1.voted_users == accept
