| #!/usr/bin/python3.8 |
| # |
| # Copyright 2020 The Fuchsia Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import unittest |
| |
| from typing import List |
| |
| import util |
| |
| |
| class TestUtil(unittest.TestCase): |
| |
| def test_exponential_backoff(self) -> None: |
| clock = util.FakeClock() |
| backoff = util.ExponentialBackoff( |
| clock, min_poll_seconds=1., max_poll_seconds=10., backoff=2.) |
| backoff.wait() |
| backoff.wait() |
| backoff.wait() |
| backoff.wait() |
| backoff.wait() |
| backoff.wait() |
| self.assertEqual(clock.pauses, [1., 2., 4., 8., 10., 10.]) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |
