def test_timestamp_age(self, monkeypatch, backend):
f = Fernet(base64.urlsafe_b64encode(b"\x00" * 32), backend=backend)
# Create the token some time in the past.
ts = "1985-10-26T01:20:01"
current_time = calendar.timegm(iso8601.parse_date(ts).utctimetuple())
monkeypatch.setattr(time, "time", lambda: current_time)
token = f.encrypt(b'encrypt me')
# Check the age 10 seconds later.
ts = "1985-10-26T01:20:11"
current_time = calendar.timegm(iso8601.parse_date(ts).utctimetuple())
monkeypatch.setattr(time, "time", lambda: current_time)
assert f.age(token) == 10
# Check the age 59 seconds later.
ts = "1985-10-26T01:21:00"
current_time = calendar.timegm(iso8601.parse_date(ts).utctimetuple())
monkeypatch.setattr(time, "time", lambda: current_time)
assert f.age(token) == 59
# Check the age two minutes later.
ts = "1985-10-26T01:22:01"
current_time = calendar.timegm(iso8601.parse_date(ts).utctimetuple())
monkeypatch.setattr(time, "time", lambda: current_time)
assert f.age(token) == 120
