def test_decrypt_at_time(self, backend):
f1 = Fernet(base64.urlsafe_b64encode(b"\x00" * 32), backend=backend)
f = MultiFernet([f1])
pt = b"encrypt me"
token = f.encrypt_at_time(pt, current_time=100)
assert f.decrypt_at_time(token, ttl=1, current_time=100) == pt
with pytest.raises(InvalidToken):
f.decrypt_at_time(token, ttl=1, current_time=102)
with pytest.raises(ValueError):
f.decrypt_at_time(token, ttl=None, current_time=100)
