blob: fd5ac73f1e47274e829d4e50f56c474d659a6eeb [file] [log] [blame]
#!/usr/bin/python2
#
# Copyright 2015 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Unittests for server/cros/dynamic_suite/frontend_wrappers.py"""
import mox
import unittest
import common
from autotest_lib.server.cros.dynamic_suite import frontend_wrappers
class FrontendWrappersTest(mox.MoxTestBase):
"""Unit tests for frontend_wrappers global functions."""
def testConvertTimeoutToRetryBasic(self):
"""Test converting timeout and delay values to retry attempts."""
backoff = 2
timeout_min = 10
delay_sec = 10
max_retry = frontend_wrappers.convert_timeout_to_retry(backoff,
timeout_min,
delay_sec)
self.assertEquals(max_retry, 6)
def testConvertTimeoutToRetryLimit(self):
"""Test approaching a change in attempt amount."""
backoff = 2
delay_sec = 10
timeout_min_lower_limit = 42.499999
timeout_min_at_limit = 42.5
timeout_min_upper_limit = 42.599999
max_retry_lower_limit = frontend_wrappers.convert_timeout_to_retry(
backoff, timeout_min_lower_limit, delay_sec)
max_retry_at_limit = frontend_wrappers.convert_timeout_to_retry(
backoff, timeout_min_at_limit, delay_sec)
max_retry_upper_limit = frontend_wrappers.convert_timeout_to_retry(
backoff, timeout_min_upper_limit, delay_sec)
# Eight attempts with a backoff factor of two should be sufficient
# for timeouts up to 2550 seconds (or 42.5 minutes).
self.assertEquals(max_retry_lower_limit, 8)
self.assertEquals(max_retry_at_limit, 8)
# We expect to see nine attempts, as we are above the 42.5 minute
# threshold.
self.assertEquals(max_retry_upper_limit, 9)
def testConvertTimeoutToRetrySmallTimeout(self):
"""Test converting to retry attempts when a small timeout is used."""
backoff = 2
timeout_min = 0.01
delay_sec = 10
max_retry = frontend_wrappers.convert_timeout_to_retry(backoff,
timeout_min,
delay_sec)
# The number of attempts should be less than one using the formula
# outlined in the function, but, we always round up to the nearest
# integer.
self.assertEquals(max_retry, 1)
def testConvertTimeoutToRetrySmallDelay(self):
"""Test converting to retry attempts when the delay is small."""
backoff = 2
timeout_min = 30
delay_sec = 0.01
max_retry = frontend_wrappers.convert_timeout_to_retry(backoff,
timeout_min,
delay_sec)
# The number of retries shouldn't be too large despite the small
# delay as a result of backing off in an exponential fashion.
self.assertEquals(max_retry, 18)
if __name__ == '__main__':
unittest.main()