def test_invalid_access_token(self):
access_token = AccessToken(token='abcdef', expires_at=expires_at(hours=-1))
assert access_token.expires_in == 0
assert access_token.is_expired() == True
def test_access_token(self):
access_token = AccessToken(token='abcdef', expires_at=expires_at(hours=1))
assert access_token.expires_in <= 3600
assert access_token.is_expired() == False
